In DNS/LES simulation of a helium plume in air, Mach=0.01, strong buoancy, is 2/3div(u) term in stress tensor important for turbulence development ?

We are using a code where the divergence of velocity is neglected in the stress tensor for a low Mach approximation. We inject a pure helium plume in an air cavity. In PIV experiments the flow is...

11 October 2018 8,936 5 View