Hello, A yearly allocation for the LCRC cluster has been requested with the following updated information: Submitter/PI: Shashi Aithal Project Name: PETSc-Foam Division: CELS Project title: Investigation of robust, scalable solvers for OpenFoam Associated funding: Other Systems: Science: OpenFOAM (OF) is a multi-physics open-source solver code capable of modeling a wide-range of problems of interest to various divisions at ANL. One of the strengths of OpenFOAM is that new solvers and utilities can be created by its users. In this project, we intend to investigate fast, robust, scalable solvers for problems involving moving boundaries and combustion. The goal is to study various methodologies for load-balancing and solvers for large-scale simulations. Project description: OF is parallel, finite-volume CFD code which will be used for this project. Scaling studies on dsmcFoam and dieselFoam have shown good scalability. Small DSMC cases (1 million cells) have shown good scalability up to 192 cores. DieselFoam has shown good scalability up to 512 cores with about 500K cells. We will continue use OpenFoam-dev (a variant of OF2.3-x) as the computational tool with our own in-house developments. Various algorithms for efficient domain decomposition and solution methods for combusting mixtures will be investigated for optimal performance and robustness. New mesh-motion strategies, turbulence models and higher resolution studies are planned. It is seen that about 50000 cells/core is required for good linear scaling with OF with the problems we are working on. Typical simulations with about 1.5 million cells take about 1000 core hours. This year we plan to work on code development for additional physics and testing of these new developments. The main plans for this year include the following 1) Integrating chemFoam solver currently capable of single-cell (PSR) chemistry calculations with the flow-solver for multi-dimensional reacting flow simulations in realistic engines. Standard mechanisms such as gasoline (874 species, 3811 reactions) will be tested with the moving mesh problem for simplified engine geometries. 2) VOF modeling of the primary breakup of sprays in next generation injectors including effects of needle valve opening and closing 3) Investigation of improvements in OF solvers for reduction of numerical dissipation. This year we plan to run some larger simulations (about 15 million cells) along with smaller problems to test the above developments. We anticipate about 10 smaller runs (1000 core-hours) and about 1-2 10,000 core-hour jobs/month, totaling about 30,000 core-hours/month or 360000 core-hours/year. Industry partnership: None Project URL: Current FY Hours Used: undetermined amount New FY Requested allocation: 360000 Q1: 50000 Q2: 130000 Q3: 50000 Q4: 130000 Justification: Storage requirements: Thank You, The LCRC Accounts System