[john myce]

Originally Posted by gu1

** In fact, I am curious, how do you calculate the y+ for these cases of natural convection?

I await your reply.

Hi,

For the y+ I used a post processing command line to run after the end of the solver.

mpirun -np 12 buoyantSimpleFoam -postProcess -latestTime -func yPlus

You can also declare the resolution of the yPlus in the controlDict file to run it automatically :

yPlus
{
type yPlus;
libs (fieldFunctionObjects); // v1912, it has been changed regarding the version
writeControl writeTime;
writeControl timeStep;
writeInterval 100;
}

For the nut, k, omega ... I found that the guy which created the tutorial buoyantCavity (buoyantSimpleFoam), use the mean root square of the velocity (Urms in the publication) measured by Betts et al. (P.L. Betts, I.H. Bokhari / Int. J. Heat and Fluid Flow 21 (2000) 675±683) Experiments on turbulent natural convection in an enclosed tall
cavity. In the publication they did not say how they calculate/measured this term.

I do not know if everyone is doing this or there is an alternative way for natural convection case.

Cheers.