August 2012 - Allocations-admins - mailman3.cels.anl.gov

[LCRC Accounts] Project Request: spray-modeling
by accounts＠lcrc.anl.gov 22 Aug '12

22 Aug '12

Hello, A new project on the LCRC cluster has been requested. Please forward the information on to the LCRC Allocation sub-committee. Applicant's name: Sibendu Som Applicant's institution: ANL Applicant's division: Energy Systems Project Name: spray-modeling Project title: Development of a near nozzle spray modeling approach Associated funding: DOE - Office of Vehicle Technologies Other Systems: Convergent Science Inc., Cummins Engine Company Science: The flow inside the nozzle is critical to the near nozzle flow development which in turn influences engine performance and emission characteristics. In the past decade, there has been significant increase in interest for improving the performance and emission characteristics of compression ignition (CI) engines using different nozzle orifice geometries and alternative fuels. However, the lack of modeling tools to accurately predict the influence of in-nozzle flow on spray and combustion development has partly decelerated its (combination of nozzle geometries and alternative fuels) large-scale implementation into the existing infrastructure. The proposed objectives of this project are aimed at further enhancing the predictive capabilities of the near nozzle spray model. The nozzle flow, spray, and combustion model developments will be performed using the commercial code called CONVERGE. This tool is being used by several transportation OEMs such as Ca terpillar Inc., Chrysler LLC., Cummins Inc., Ford Motor Company, etc. Hence, these developments will readily facilitate improvements in nozzle orifice design and choice of fuel blends. Project description: The project is divided into 5 major tasks to be performed in 3 years in collaboration with Convergent Science Inc., and Cummins Engine Company: Task 1: Development and validation of a nozzle flow model to account of transient effects such as needle movement, needle off-axis motion, rail pressure fluctuations etc. Task 2: Further advancement of KH-ACT (Kelvin Helmholtz – Aerodynamic Cavitation Turbulence) primary breakup model to calculate more accurately relevant length and time-scales for the cavitation, turbulence, and aerodynamically induced breakup processes. Task 3: In the past nozzle flow and spray simulations have been statically coupled. A dynamic coupling approach will be developed so that the nozzle flow simulations can influence the spray development and vice versa. This is quite complicated since the length and time scales associated with nozzle flow processes are significantly different from spray processes. Task 4: An one equation non-viscosity dynamic structure model large eddy simulation (LES) based turbulence modeling approach will be implemented in CONVERGE. Grid-convergence on critical spray parameters will be evaluated with the implemented LES models. Task 5: Implementation of an Eulerian-Lagrangian spray model: While dynamic coupling of the nozzle flow and KH-ACT models will enhance the accuracy of spray simulations, a transition between the Eulerian and Lagrangian phases must take place at the nozzle exit with this approach. Moving the transition point downstream allows for a more natural bridge between the coupled simulations as the liquid fuel is modeled in an Eulerian framework on both sides of the nozzle exit. A specific challenge of this task is developing an algorithm to convert the Eulerian liquid to Lagrangian parcels outside of the dense spray region. Project URL: http://www.transportation.anl.gov/engines/multi_dim_model_home.html Requested allocation: 495000 Q1: 125000 Q2: 125000 Q3: 125000 Q4: 120000 Justification: The requester has used undetermined amount hours of their initial startup project. In addition to approving an initial amount, please specify a Category and Subcategory for this project. For a list of the current selection of approved categories, please see: https://wiki.lcrc.anl.gov/wiki/Processes/Categories Once the Allocation committee has approved the project, please go to the Project Management page to create it: https://accounts.lcrc.anl.gov/projects.php Thank You, The LCRC Accounts System

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[LCRC Accounts] Yearly Allocation Request from foam-EngineProcesses
by accounts＠lcrc.anl.gov 22 Aug '12

22 Aug '12

Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Sibendu Som Project Name: foam-EngineProcesses Division: ES Project title: Assessment of OpenFOAM for different Engine-Process Applications Associated funding: DCG-LDRD, DOE-Vehicle Technologies Office Other Systems: Science: This project will use an Eulerian-Lagrangian Computation Fluid Dynamics (CFD) open source code called OpenFOAM to model various internal combustion engine processes like engine full-cycle and gas-exchange, sprays and gaseous jets behavior, nozzle internal flow, mixture formation, combustion and exhaust emissions. The goal is to assess the performance of OpenFOAM for varied engine-process applications. Scalability of OpenFOAM for different applications will also be tested. Project description: CFD problems in general are not linearly scalable because of the need for high inter-processor communication. This results in loss of computational efficiency. Performance monitoring tools will be used extensively to understand computation and communication patterns for various physical models (turbulence, transport properties), chemistry mechanisms (varying number of species and reactions) and grid-sizes. Based on these studies, different domain decomposition approaches will be assessed for optimum load-balancing among different processors. Strong and weak scalability for various problem-sizes will thus be assessed. Project URL: http://www.transportation.anl.gov/engines/multi_dim_model_home.html Current FY Hours Used: undetermined amount New FY Requested allocation: 495000 Q1: 125000 Q2: 125000 Q3: 125000 Q4: 120000 Justification: Thank You, The LCRC Accounts System

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[LCRC Accounts] Project Request: polar_interfaces
by accounts＠lcrc.anl.gov 22 Aug '12

22 Aug '12

Hello, A new project on the LCRC cluster has been requested. Please forward the information on to the LCRC Allocation sub-committee. Applicant's name: Alejandro Rebola Applicant's institution: ANL Applicant's division: MSD Project Name: polar_interfaces Project title: Polar Interfaces for Enhanced Ionic Conductivity Associated funding: US Department of Energy, Office of Science-Basic Energy Sciences Division of Materials Sciences and Engineering Other Systems: NERSC (120,000) Science: LaGaO3 (LGO) is one of the most remarkable ionic conductors discovered in the last years. When either doped with Mg or Sr, the ionic conductivity of LGO reaches values of 0.1 S/cm, at an even lower working temperature (1073 K) than that of yttria stabilized zirconia (Y/ZrO2). However, one of the disadvantages of doping is that interactions between dopant ions and their charge-compensating defects can lead to the formation of clusters capable of “trapping” the migrating species. In order to avoid the drawbacks of doping and to achieve enhanced ionic transport in LGO -where oxygen vacancies are the dominant carriers- we propose the use of polar interfaces as a way to induce a vacancies enrichment layer in LGO. We plan to model polar interfaces comprising LGO and other perovskites with a matching lattice parameter, such as CaHfO3 (CHO). By creating negatively charged interfaces, and by using perovskites composed by single valence elements, we expect the formation of oxygen vacancies as compensating defects to be a very likely compensation mechanism. Calculations in order to asses the different compensating mechanisms, formation and activation energies of oxygen vacancies, as well as other quantities of interest will be performed within the Density Functional Theory formalism and by using state of the art computational software. Project description: The calculations outlined below will be performed by using the VASP and Quantum Espresso codes. According to our experience, these codes scale up to ~48 cores in the type of calculations considered in the present proposal. In order to investigate the properties of negative LGO/CHO interfaces, the following calculations will be performed: 1) Calculations for LGO and CHO bulk systems. Relaxations for both internal and lattice parameters will be performed in both bulk structures before modeling the interface. Defect formation energies for both vacancies and interstitials will be calculated in each material for different supercell sizes in order to ensure convergence. This part of the calculation would require a total of 10,000 core-hours. 2) Polar LGO/CHO interfaces are going to be considered for different number of LGO and CHO unit cells in order to determine critical thickness for defect formation. Systems with and without defects are going to be considered. In the latter different locations and configurations are going to be calculated in order to find the most stable ones. Given the size of the largest supercells to be considered (~300 atoms) and the different possible configurations for defects (vacancies, interstitials, cation substitution), this part of the calculation would require -according to our previous experience in similar systems- a total of 250,000 core-hours, approximately. 3) Once determined the most stable configuration for defects, a Nudge Elastic Band (NEB) calculation will be performed in order to determine the activation energy for oxygen vacancies in the LGO/CHO heterostructure. NEB calculations, since the require optimizations over several images, are usually costly. Our previous experience indicates that this could be done with a total of 50,000 core-hours. 4) Finally, single point calculations at a denser k-point grid and with a higher cutoff will be performed in order to obtain density of states, band structure, potential profiles and more accurate defect formation energies. This part of the calculation is not very demanding and could be done with a total of 10,000 core hours, approximately. In conclusion, we estimate that in order to accomplish our project it will be necessary a total of 320,000 core-hours, approximately. Project URL: Requested allocation: 320000 Q1: 100000 Q2: 100000 Q3: 100000 Q4: 20000 Justification: The requester has used undetermined amount hours of their initial startup project. In addition to approving an initial amount, please specify a Category and Subcategory for this project. For a list of the current selection of approved categories, please see: https://wiki.lcrc.anl.gov/wiki/Processes/Categories Once the Allocation committee has approved the project, please go to the Project Management page to create it: https://accounts.lcrc.anl.gov/projects.php Thank You, The LCRC Accounts System

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[LCRC Accounts] Yearly Allocation Request from biodiesel-combustion
by accounts＠lcrc.anl.gov 22 Aug '12

22 Aug '12

Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Sibendu Som Project Name: biodiesel-combustion Division: ES Project title: Computation Fluid Dynamics Modeling of Petrodiesel and Biodiesel Associated funding: LDRD Project Other Systems: Science: This project will use an Eulerian-Lagrangian Computation Fluid Dynamics (CFD) software called CONVERGE to model various diesel engine processes like internal nozzle flow, spray behavior, combustion and emission processes. The goal is to capture the differences between diesel and biodiesel fuels from a CFD standpoint since computer based modeling is more cost effective than performing full scale laboratory experiments. Project description: The project is dived in two parts: In the first part, engine processes will be modeled using petrodiesel. The spray data obtained from Advanced Photo Source at Argonne and single-cylinder engine performance and emission data from CAT cell will be used to further develop and validate spray and combustion models in CONVERGE and perform parametric studies. The major motivation is to develop more predictive and robust sub-models for capturing diesel engine processes. In the second part, fundamental studies will be performed to establish flame stabilization and lift-off characteristics of biodiesel using CONVERGE. A new surrogate (consisting of methyl decanoate, methyl 9 decenoate, n-heptane) fuel will be used for modeling the combustion characteristics of biodiesel. Comparison will be performed between inner nozzle flow, non-evaporating and evaporating spray, combustion characteristics, engine performance and emission characteristics of biodiesel and petrodi esel. Biodiesel fuel obtained from different feedstocks such as Soy, Cuphea, Rape-seed will be modeled. Blends of biodiesel with diesel fuel will also be simulated. The CONVERGE software has been observed to scale well up to 96 processors and full-cycle engine simulations. Project URL: http://www.transportation.anl.gov/engines/multi_dim_model_home.html Current FY Hours Used: undetermined amount New FY Requested allocation: 495000 Q1: 150000 Q2: 150000 Q3: 100000 Q4: 95000 Justification: Thank You, The LCRC Accounts System

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[LCRC Accounts] Yearly Allocation Request from cfd_enginemodeling
by accounts＠lcrc.anl.gov 22 Aug '12

22 Aug '12

Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Sibendu Som Project Name: cfd_enginemodeling Division: ES Project title: Computation Fluid Dynamics Modeling of Diesel Engine Processes Associated funding: DOE – Office of Vehicle Technologies Other Systems: Science: This project will use an Eulerian-Lagrangian Computation Fluid Dynamics (CFD) software called CONVERGE to model various diesel engine processes like internal nozzle flow, spray behavior, combustion and emission processes. The goal is to develop predictive nozzle flow, spray, combustion, and turbulence models for compression ignition engine fuels. Project description: The project is divided into three major phases: 1)Cavitation modeling: A two-phase cavitation modeling approach using the homogeneous relaxation method will be developed and implemented in CONVERGE. Extensive validation of the new model will be performed against experimental data available in literature. 2)Spray Modeling: Traditional Eulerian-Lagrangian spray modeling approaches are hampered by the fact that the results are not grid-independent. Grid-convergent spray modeling approaches will be developed and validated against experimental data from the Engine Combustion Network. The simulations will be performed in a constant volume combustion vessel since it is a more effective crucible for model validation 3)Turbulence Modeling: Traditionally engine simulations have been performed using the Reynolds Average Navier Stokes Equations (RANS) approach. RANS employs filtering in time to derive the governing equations for the mean state. Turbulent interactions over the full range of dynamic scales are averaged to make the calculations affordable for engineering analysis. Only the largest energy containing features in a flow are resolved and no information exists to describe broadband small-scale interactions. Thus, computational requirements for RANS are relatively low and the most affordable. However, case-by-case calibration of models is required, and stochastic processes such as cycle-to-cycle variations cannot be captured in RANS. Large Eddy Simulation (LES) directly resolves the large scale unsteady motions that account for the bulk spatial transportation, while smaller scales of the flow are removed through a filtering operation and treated by using subgrid scale (SGS) models fo r reduced computational cost. By resolving the large-scale turbulence, LES can significantly improve the accuracy of flow predictions compared to RANS. A dynamic structure based LES model will be developed and the results will be compared against RANS. The CONVERGE software has been observed to scale well up to 96 processors and full-cycle engine simulations. Project URL: http://www.transportation.anl.gov/engines/multi_dim_model_home.html Current FY Hours Used: undetermined amount New FY Requested allocation: 495000 Q1: 125000 Q2: 125000 Q3: 125000 Q4: 120000 Justification: Thank You, The LCRC Accounts System

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[LCRC Accounts] Yearly Allocation Request from Lattice-QCD
by accounts＠lcrc.anl.gov 22 Aug '12

22 Aug '12

Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Donald Sinclair Project Name: Lattice-QCD Division: HEP Project title: Lattice simulations of Conformal and Walking Technicolor. Associated funding: DOE Other Systems: NERSC Cray XT6, "Hopper" NERSC Cluster, "Carver" NICS Cray XT5, "Kraken" Science: We are using our simulation methods developed for lattice QCD to study extensions of the standard model of High Energy Physics, in which the Higgs sector is strongly interacting, and the Higgs fields are composites. This has become all the more relevant with the recent report of the discovery of a Higgs-like particle at the LHC at CERN. We are particularly interested in QCD-like theories whose pions play the role of the Higgs field in giving masses to the W and Z gauge bosons. Such theories are called Technicolor theories. We are particularly interested in Walking Technicolor theories, whose slowly evolving couplings evade some of the technical difficulties associated with the phenomenology of Technicolor and Extended Technicolor theories. Our initial studies are of the thermodynamics of such theories, since these provide a simple way of measuring the scales of confinement and of chiral symmetry breaking. Our previous work on N_t=4,6,8 lattices (for 2 flavours) has indicated that larger N_t's are needed to access continuum physics. For 3 flavours, our work on N_t=4,6 and preliminary work on N_t=8 lattices also suggest the need for larger N_t's. Project description: We perform simulations to evaluate the functional integrals of QCD-like theories formulated on a discrete space-time lattice, to enable determination of the non-perturbative aspects these theories. These include the properties of these theories at non-zero temperature, including the scales of confinement and chiral symmetry breaking, and such zero temperature properties as spectra (including the Higgs mass), decay constants and the running of the gauge coupling constant. We are particularly interested in those theories where the coupling constant evolves very slowly, since these are candidate 'Walking Technicolor' theories. Related to these are theories with an infrared fixed point (conformal field theories). Our first goal is to differentiate between these two different types of behaviour for candidate theories. We are performing simulations of QCD-like theories which are models for Walking or Conformal Technicolor. We have been studying theories which are essentially QCD but with colour-sextet rather than colour-triplet quarks. We hope to measure the running of the QCD coupling constant. For 2 or 3 flavours, 2-loop perturbation theory predicts an infrared fixed point. For 2 flavours, it is possible that a chiral condensate forms before this fixed point is reached. If so, the fixed point is avoided, the theory is confining, and chiral symmetry breaks spontaneously. However, there is a region where the coupling constant evolves very slowly. These are the properties required for a walking technicolor theory. Simulations we have performed so far at finite temperature suggest that this theory might walk. This is an ongoing program at NERSC. We are also running small-lattice simulations of the 3-flavour theory, which we expect to have conformal, rather than walking behaviour on Fusion, for comparison. If we are correct, the properties of the 2 and 3 flavour theories should look rather different. In addition to finishing these 3-flavour runs on Fusion, we plan to extend some earlier 2-flavour work on Fusion on a 24^3*8 lattice to compare with our work at NERSC on 16^3*8 lattices. These 24^3*8 runs will be of a much more limited scope than those on 16^3*8 lattices, and are needed to check that finite size effects are under control. Our sextet quark codes are based on our earlier triplet quark codes and use the RHMC simulation method. The Rational Hybrid Monte Carlo (RHMC) is a stochastic molecular dynamics algorithm. The functional integral of QCD is written as a partition function of a classical field theory evolving in a fictitious time. The determinant of the Dirac operator raised to a fractional power is calculated by introducing bosonic fields (pseudofermions), and sandwiching this Dirac operator raised to minus said fractional power between them. This fractional power of the Dirac operator is approximated to machine accuracy by a rational approximation. After defining this this theory on a discrete space-time lattice, the inversions required by the partial-fraction expansion of the rational approximation are performed using Krylov space methods, in particular a multi-shift extension of the conjugate gradient algorithm. A global Metropolis Monte-Carlo accept/reject step applied at the end of each trajectory removes discretization errors introduced by the numerical integration of these stochastic equations of motion. We parallelize the code by assigning a fixed number of adjacent lattice sites to each MPI task. Network bandwidth ultimately limits how small a chunk of the lattice can be assigned to each task. Experience with benchmarking this code on a variety of lattice sizes indicates that we should expect a performance of approximately 3 Gflops/core for a 24^3*8 lattice running on 192 cores, i.e. around 550 to 600 Gflops. In each case we have checked, this per core performance remains nearly constant as the number of cores is varied, so that maximum throughput is achieved at the largest number of cores allowed by the current implementation (in this case 192). Project URL: http://www.hep.anl.gov/dks Current FY Hours Used: undetermined amount New FY Requested allocation: 975000 Q1: 350000 Q2: 300000 Q3: 200000 Q4: 125000 Justification: The per core performance for the 24^3*8 runs is approximately 3 Gflops on 192 cores. Althought we have not performed such a detailed analysis as for the 24^3*12 lattice, we expect at worst a linear speedup from the minimum number of cores (8) to the maximum number of cores (192). We note that the single node environment -- size and shape of the sublattice and communication pattern -- is identical for these 2 lattice sizes, which is why a separate performance analysis is unnecessary. This code has been running effectively on Fusion since it was released to the user community. We will be concentrating on the 2-flavour runs on 24^3*8 lattices with m=0.0025 on Fusion. Each run is expected to take approximately 60 wallclock-hours, and we are budgeting for 80 such runs. We are not providing detailed scaling analysis, since this was provided in previous years, and the code is unchanged. The main enhancement we have planned for this year is to rearrange the task to node assignments to assign a 24^2*4*2 section of the lattice to each node, rather than the default 24^2*8*1 section, by setting MPICH_RANK_REORDER_METHOD=3 and providing an appropriate MPICH_RANK_ORDER file. This will reduce the communication overhead. Any reduction of CPU time obtained by this enhancement will be used to finish our current project on a 16^3*8 lattice using 128 cores. Thank You, The LCRC Accounts System

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[LCRC Accounts] Yearly Allocation Request from cfd_rcmmodeling
by accounts＠lcrc.anl.gov 22 Aug '12

22 Aug '12

Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Michael Johnson Project Name: cfd_rcmmodeling Division: ES Project title: Computation Fluid Dynamics Modeling of RCM performance Associated funding: DOE funding Other Systems: Science: This project will use an Eulerian-Lagrangian Computation Fluid Dynamics (CFD) software called CONVERGE to model various Rapid Compression Machine (RCM) geometries. The goal is to accurate simulate the RCM operation in order to optimize system geometries, accurately predict heat loss, and model new system performance. Project description: The project is dived in three parts: In the first part the known geometry of the ANL RCM will be studied. Initially, model validation will be done with both coarse and fine meshes without crevices. This will be compared to hand calculations and will use various system parameters. Then creviced piston geometries will be studied and results compared to previous work to validate the approach. The second part will be the development and validation of a physics based heat loss model applicable across a range of system parameters and geometries. Initial work will be checked against previous work, then extended to include new geometries and RCM trajectories. Finally, the third part will be using Converge to optimize new system components to ensure proper functioning of the new equipment. Project URL: http://www.transportation.anl.gov/ Current FY Hours Used: undetermined amount New FY Requested allocation: 50000 Q1: 12500 Q2: 12500 Q3: 12500 Q4: 12500 Justification: Thank You, The LCRC Accounts System

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Re: [allocations-admins] [LCRC Accounts] Yearly Allocation Request from SHARP-IF
by John Valdes 21 Aug '12

21 Aug '12

FYI, resubmitted request with corrected request values. John On Tue, Aug 21, 2012 at 03:45:09PM -0500, accounts(a)lcrc.anl.gov wrote: > Hello, > > A yearly allocation for the LCRC cluster has been requested with the > following updated information: > [...] > > New FY Requested allocation: 400000 > Q1: 80000 > Q2: 100000 > Q3: 100000 > Q4: 120000 >

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[LCRC Accounts] Yearly Allocation Request from SHARP-IF
by accounts＠lcrc.anl.gov 21 Aug '12

21 Aug '12

Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Rui Hu Project Name: SHARP-IF Division: NE Project title: SHARP ??? Intermediate Fidelity Modeling Associated funding: DOE-Nuclear Energy Other Systems: Science: An intermediate fidelity (IF) modeling method is being pursued under NEAMS Reactor IPSC (SHARP) for a fast-running, modest-fidelity, whole-core transient analyses capability. The approach is essential for design scoping and engineering analyses and could lead to improvements in the design of the new generations of reactors and to the reduction of uncertainties in safety analysis. The IF method relies on RANS based turbulence modeling approach and advanced system modeling methods to represent the fluid flow and heat transfer physics. Project description: The system analysis code and the RANS-based commercial CFD code STAR-CCM+ are incorporated into the SHARP framework for a multi-scale analysis of Sodium Fast Reactors. In the previous fiscal year, the feasibility of performing coupled SAS/STAR-CCM+ simulations of protected loss-of-flow accident was demonstrated. In that effort, the outlet plenum was modeled by STAR-CCM+ and the rest of the primary coolant system and the secondary system were simulated by SAS, and the flow and temperature conditions at the interface were exchanged between the two codes as boundary conditions. Recently, a new system analysis code, SAS11 is being developed to simulate the integrated multi???physics performance of the entire power plant. It still relies on lumped parameter representations of the fluid mechanics, structural mechanics, and heat transfer physics. However, the physics models, numerical methods, and the software structure have been greatly improved from the legacy code SAS4A/SASSYS-1. In the planned activities for FY13, the SAS11 code will be used for whole-plant simulations of SFR systems. Its validity to model protected loos-of-flow and unprotected loss-of-flow accidents will be examined. Additionally, it will be coupled with CFD code STAR-CCM+ for the same transient simulations, in which the two codes simulate different domains of the system and the flow and temperature conditions at the interface will be exchanged between the two codes as boundary conditions. Furthermore, the CFD code STAR-CCM+ will be used for design evaluations of reactor systems or experimental facilities. Notably, the natural convection shutdown test facility that is currently being built will be examined by CFD simulations. This type of simulations is essential for the design of the instrumentation system. Also, the pre-test simulation results will be compared against to the experimental results as a validation study of the CFD code. At Argonne, the CFD code STAR-CCM+ are routinely applied to simulations that use more than 100 cores, and good parallel performance has been observed. As problem size increases, i.e. for finer meshes and for large pin bundles, larger numbers of cores would be utilized and based on data from the developers good parallel performance will continue to be expected. On the other hand, SAS11 is a new development. The parallelization will be provided by the underlying MOOSE framework which is built on PETSc. The scalability of MOOSE has been demonstrated by other MOOSE-based applications. The system code usually relies on coarse representation of the system thus does not require significant amount of computing resources. Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 400000 Q1: 80000 Q2: 100000 Q3: 100000 Q4: 120000 Justification: Thank You, The LCRC Accounts System

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[LCRC Accounts] Yearly Allocation Request from SHARP-IF
by accounts＠lcrc.anl.gov 21 Aug '12

21 Aug '12

Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Rui Hu Project Name: SHARP-IF Division: NE Project title: SHARP – Intermediate Fidelity Modeling Associated funding: DOE-Nuclear Energy Other Systems: Science: An intermediate fidelity (IF) modeling method is being pursued under NEAMS Reactor IPSC (SHARP) for a fast-running, modest-fidelity, whole-core transient analyses capability. The approach is essential for design scoping and engineering analyses and could lead to improvements in the design of the new generations of reactors and to the reduction of uncertainties in safety analysis. The IF method relies on RANS based turbulence modeling approach and advanced system modeling methods to represent the fluid flow and heat transfer physics. Project description: The system analysis code and the RANS-based commercial CFD code STAR-CCM+ are incorporated into the SHARP framework for a multi-scale analysis of Sodium Fast Reactors. In the previous fiscal year, the feasibility of performing coupled SAS/STAR-CCM+ simulations of protected loss-of-flow accident was demonstrated. In that effort, the outlet plenum was modeled by STAR-CCM+ and the rest of the primary coolant system and the secondary system were simulated by SAS, and the flow and temperature conditions at the interface were exchanged between the two codes as boundary conditions. Recently, a new system analysis code, SAS11 is being developed to simulate the integrated multi‐physics performance of the entire power plant. It still relies on lumped parameter representations of the fluid mechanics, structural mechanics, and heat transfer physics. However, the physics models, numerical methods, and the software structure have been greatly improved from the legacy code SAS4A/SASSYS-1. In the planned activities for FY13, the SAS11 code will be used for whole-plant simulations of SFR systems. Its validity to model protected loos-of-flow and unprotected loss-of-flow accidents will be examined. Additionally, it will be coupled with CFD code STAR-CCM+ for the same transient simulations, in which the two codes simulate different domains of the system and the flow and temperature conditions at the interface will be exchanged between the two codes as boundary conditions. Furthermore, the CFD code STAR-CCM+ will be used for design evaluations of reactor systems or experimental facilities. Notably, the natural convection shutdown test facility that is currently being built will be examined by CFD simulations. This type of simulations is essential for the design of the instrumentation system. Also, the pre-test simulation results will be compared against to the experimental results as a validation study of the CFD code. At Argonne, the CFD code STAR-CCM+ are routinely applied to simulations that use more than 100 cores, and good parallel performance has been observed. As problem size increases, i.e. for finer meshes and for large pin bundles, larger numbers of cores would be utilized and based on data from the developers good parallel performance will continue to be expected. On the other hand, SAS11 is a new development. The parallelization will be provided by the underlying MOOSE framework which is built on PETSc. The scalability of MOOSE has been demonstrated by other MOOSE-based applications. The system code usually relies on coarse representation of the system thus does not require significant amount of computing resources. Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 112000 Q1: 80000 Q2: 10000 Q3: 10000 Q4: 12000 Justification: Thank You, The LCRC Accounts System

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