MFIX-Exa: Performance prediction of multiphase energy conversion devices

Conference · Tue Apr 19 00:00:00 EDT 2022

OSTI ID:1866221

Musser, Jordan ^[1]; Almgren, Ann ^[2]; Porcu, Roberto ^[3]; Rangarajan, Deepak ^[3]; Wang, Hengjie ^[2]; Fullmer, William D. ^[3]

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1. NETL
2. Lawrence Berkeley National Laboratory (LBNL)
3. NETL Site Support Contractor, National Energy Technology Laboratory

MFIX-Exa targets the high-fidelity CFD-DEM model in which particles are unresolved by the fluid grid (typically using a fluid mesh approximately twice the particle diameter) but discrete particle dynamics including collisions are resolved with a simple linear-spring dashpot model. The fluid field is solved with a modern low Mach number formation of a cell-centered, nodal-pressure approximate projection method using a Godunov scheme . Physics capabilities include: complex geometries via embedded boundaries (EBs), open and closed system ideal gas equations of state, species transport and heterogeneous chemi- cal reactions. MFIX-Exa is built on the AMReX software framework, the ECP Block-Structured Adaptive Mesh Refinement (AMR) Co-Design Center, which allows the code to be portable and performant.Further integration into the ECP ecosystem includes HYPRE linear solvers and Ascent for in situ visualization. Current project efforts focus on scaling up realistic simulations to the KPP of the challenge problem: NETs 50kW chemical looping reactor, shakedown and scaling on JSLE and OLCF TDS systems and reaching for any remaining performance improvements.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• OSTI ID: 1866221
• Country of Publication: United States
• Language: English