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: Zihan Wang Applicant's institution: ANL Applicant's division: Energy Systems Project Name: dual-fuel-sprays Project title: High-fidelity modeling of gasoline and diesel sprays in a Chrysler dual-fuel engine Associated funding: DOE - Office of Vehicle Technologies Other Systems: Chrysler Group LLC, Convergent Science Inc. Science: We have previously shown that Diesel Micro Pilot (DMP) combustion mode in a gasoline/ Diesel dual-fuel engine is promising to achieve both lower soot and NOx emissions over a wide range of engine load and speed. Under DMP conditions, gasoline is directly injected in the cylinder. Its spray pattern is critical to gasoline/ air mixing before ignition. The diesel fuel is the igniting source for the gasoline/ air mixture. Hence it is critical to understand both gasoline and diesel injection and mixture formation characteristics. This involves predicting the spray penetration and radial distribution accurately. Such information is available from x-ray radiography experiments performed at Argonne Advanced Photon Source. This x-ray dataset will be used to develop good correlations for gasoline and Diesel spray modeling set-up. With the use of parallel processing and highly-scalable CFD solvers, Large Eddy Simulation (LES), which directly resolves the large scales in the flow field, is able to provide more detailed local flow structures and “cycle-to-cycle” variations in both gasoline and diesel spray events. Project description: The project is divided into three major tasks to be performed in 12 months in collaboration with Chrysler Group LLC and Convergent Science Inc.: Task 1: Traditional Reynolds-Averaged Navier-Stokes (RANS) method will be applied to study non-evaporating gasoline and diesel sprays. Previously studied grid-convergence criteria will be implemented. Simulation results such as spray penetration, projected spray density, and Transverse Integrated Mass (TIM) will be validated against experimental measurements. Task 2: Large Eddy Simulation (LES) method with a couple of available sub-grid models will be applied to study spray events under the same conditions as Task 1. Previously studied grid-convergence criteria specific to LES will be implemented. Results will be compared to both RANS results and experimental measurements. Task 3: Sensitivity analysis on important spray parameters and ambient conditions and injection pressures will be investigated. Influence of spray model constants will be studied. The specific methods used for the multi-phase, reacting flow simulations with moving boundaries will include: 1) Finite volume schemes 2) LES (dynamic structure) and RANS turbulence models used 3) Detailed chemical kinetic models for diesel fuels 4) CONVERGE software is being used - ~120 licenses available 5) Scales well up-to 64 processors 6) Detailed spray models used for different spray processes Project URL: Requested allocation: 499000 Q1: 125000 Q2: 125000 Q3: 125000 Q4: 124000 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