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: Shashi Aithal Applicant's institution: ANL Applicant's division: CELS Project Name: Wind_turbine_LES Project title: High-fidelity LES simulation of wind-turbine flow-fields Associated funding: Other Systems: Science: The project is focused on the application and validation of a novel filtered turbulence model (DLRM) to the fluid dynamic simulation of the wind-turbine wake, in order to predict its characteristics (pressure coefficient as a function of time and power generated). Results of the DLRM model will be compared with results obtained from the RANS k-omega SST and from the WALE LES model and with experimental PIV measurements, that are available on the same geometry. Project description: We intend to use OpenFoam 2.2-x as the computational tool for this project. OpenFOAM (OF) is a parallel, finite-volume multi-physics open-source CFD code capable of modeling a wide-range of problems of interest to DoE. One of the strengths of OpenFOAM is that new solvers and utilities can be created by its users. In this project, new moving mesh-strategies and turbulence models (RANS, LES and hybrid LES/RANS) will be applied to study fluid-flow characteristics in the near-wake region of wind-turbine blades. The performance and scalability of OF has been extensively studied. Scaling studies on dsmcFoam and dieselFoam have shown good scalability. Small DSMC cases (1 million cells) have shown good scalability up to 192 cores on Fusion. DieselFoam has shown good scalability up to 512 cores with about 500K cells on Fusion. For fluid-flow cases, it is seen that roughly 50K cells are required per core on Blues to achieve good strong scaling. For this set of wind-turbine simulations, a typical case would have around 80 million-cells. Based on our previous experience good strong scaling can be obtained up to 1600 cores on Blues for such a problem. Several different case-studies are planned for this year. A full 80-M cell case is expected to need about 80-100K core-hours. We intend to study code scaling and performance with coarse grids initially before conducting full-scale production simulations. The anticipated core-hour usage is about 400K. There will be 3-4 members on this project. Industry partnership: Project URL: Requested allocation: 400000 Q1: 50000 Q2: 150000 Q3: 150000 Q4: 50000 Justification: Storage requirements: 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