Parallel performance study for simulation of multi-phase flows with phase change development, parallelization and analysis of in-house CFD codes

Abstract

MPI based parallelization strategy incurring minimum modification in the 3D in-house serial code and good parallel performance is the focus of this work. The objective of this work is to analyze the parallel performance of multi-phase problem with phase change using the standardized parallelization technique of domain decomposition that incurs minimum modification in the code. The computational domain is mapped over a distributed memory parallel architecture using uni-directional domain decomposition. The overlapping boundary control volumes communicate with each other using MPI. The parallel performance of this parallelization methodology is studied briefly on classical problem like — simple 3D lid-driven cavity problem which stands as the benchmark for flow solver. Further, parallel performance is studied on 3D single mode film boiling, a multi-phase flow problem involving phase change. Presently, the work doesn't attribute to deal with load balancing issue and concentrates on minimum modification of the serial code and the parallel performance associated with it.