[rystokes]

HI,

I'm trying to study shear rate in a simulation by generating the velocity gradient value in cfx. This value should have a dimension of inverse second. However, when I plot the magnitude of velocity gradient , I didn't find any unit there. So what's the definition of the variable "velocity gradient " in cfx?

Another question is about a variable， taking "velocity u. gradient" as an example, is it defined this way please?

velocity u. gradient=sqrt[(partial u/partial x)^2+(partial u/partial y)^2+(partial u/partial z)^2]?


Thanks a lot for your help in advance~!