How to evaluate length scale for a pipe flow
 

Hi I want to use the turbulence intensity and length scale in my turbulence specification method but I do not know how to estimate the length scale value? knowing that I have a 3D pipe with diameter 0.0985 m?

Regards Kb

Re: How to evaluate length scale for a pipe flow
 

Hi

The length scale is usually the length of the opening, which is the diameter in your case.

Re: How to evaluate length scale for a pipe flow
 

Hi AAA thanks to the reply. If it the diameter what you think should I multiply it then by 0.07 or no? I saw in the manual that length scale=0.07 * l? what you say?

Re: How to evaluate length scale for a pipe flow
 

Hi

You are right (I was wrong!). Since you have a pipe flow, the turbulence length scale is the pipe diameter multiplied by 0.07.

Regards

AAA