using compressible options in incompressible flow

Kali Charan Nayak

I have a quick question. If one uses total engery with variable desity option CFX takes it as compressible flow. But in reality the mach number is <0.15. Is the solution acceptable? Will there be numerical problem? Please comment..

Also in the domain if at certain places Ma<0.2 and an other places Ma>0.3, what options to use in the CFX solver and how/why they are correct.

Thanks in advance. Kali