Under Relaxation

Daniel

Hi,

I am modeling a land speed record car, but due to the size and capacity of the machines that I am using I can only apply about 2million cells to my models. This gives my high continuity values. In order to reduced these I have reduced the Under-Relaxation values to (Pressure to 0.2 from 0.3 and Momentum 0.4 from 0.7). These do reduce the continuity values but how does it do this? What am I actually changing. I have looked on the Fluent manual but it is rather complex.

Any help would be greatly appriciated. Dan