Numerical investigation of heat transfer in mixing layers of turbulent flow of compressible fluid in cubic geometry using large eddy simulation

In this article, the focus is on compressible fluid, which has not been simulated in geometry with very large dimensions and high speed. Also, the method of large eddies has higher accuracy in turbulent flow modeling than other numerical simulation methods.The desired geometry is a cube with dimensions of 30 meters, and we have performed the simulation in two spatial and temporal modes separately for 100 seconds. The inputs are different in different modes so for the spatial mode, we have considered two inputs in the same direction with different speeds, and for the time mode, we have considered two inputs in opposite directions and with the same speeds. The general results obtained from this simulation showed that when the inlets are next to each other and the vortices' opposition is greater, we see more turbulence, kinetic energy and strength of the vortices and their larger size. But in the temporal mode, because the inputs are far from each other, the confrontation was not done well, so we observed less strength of eddies and smaller eddies and little spread compared to the spatial mode.