A new semi-implicit pressure-based solver considering real gas effect

Abstract

A new semi-implicit pressure-based solver considering the real gas effect is developed and tested. The advantage of the semi-implicit solver is that it can take a large time step, which makes the calculation speed faster than the classical density-based explicit solver. The comparison of the calculation speed between the explicit density-based solver and the new semi-implicit pressure-based solver is conducted by performing two-dimensional numerical simulations of a cryogenic nitrogen planar jet. Moreover, the developed pressure-based solver is validated by comparing the numerical results of a three-dimensional large-eddy simulation of a cryogenic nitrogen jet under the supercritical pressure condition with the experimental result. Results show that the developed pressure-based solver can calculate more than five times faster than the classical explicit density-based solver and accurately predict the jet behavior under the supercritical pressure condition.