[hct]

I am running a steady state CFD of windflow over a process plant.

I would like to track the root-mean-square of vertical velocity or the standard deviation of vertical velocity fluctuations in FLUENT.

However, there is no such option in FLUENT.

Since we know that

U'=√(1(u_x'^2+u_y'^2+u_z'^2)/3)=√(2k/3) , where k = turbulent kinetic energy

and that for RANS model (what I am using) assumes isotropic reynold stresses (where u_x'=u_y'=u_z') , we can come to the following formula,

√(1(3u'^2)/3)=√(2k/3)
k=3u^2/2

Which means that if i am looking for a standard deviation of vertical velocity fluctuation value of 1.75m/s, I can look for a value of 4.59 J/kg in the turbulent kinetic energy plot.

Am I interpreting this correctly?