How to selecting the turbulence specification method
 

Hello, how to choose the turbulence specification method

- my project specification
- Sudden contraction 90*
- 5/5 m/s inlet
- Turbulence flow
- 2D geometry

In boundary condition, for inlet part

How to choose turbulence specification method

It's just a matter of which parameters you actually know and find most convenient. At the end of the day, what actually gets specified is the values of your transport variables: k and epsilon, k and omega, and so on. If you want to learn how to do it the correct way, then choose k and epsilon (or omega, or whatever) and input these values directly. When you go and try to estimate k and epsilon, you'll find that you more-often-than-not use turbulence intensity and some type of length scale because these are more universal parameters that you can translate between different geometries very easily whereas k and epsilon are scale specific.