[elowfoam]

I am struggling to understand conceptually how to handle the turbulent dissipation rate (epsilon), for example in the k-epsilon RANS framework. I understand that epsilon is a calculated value per element, however in engineering design, it is often useful to know the total turbulent dissipation rate for a single device (e.g. static mixer).

In order to get the total turbulent dissipation rate from CFD for an entire static mixer, can I take an average of epsilon (m2/s2) over the entire region of fluid surrounding the device? It should not be a delta correct? Perhaps I am thinking about epsilon in the wrong way. Any advice would be appreciated.

Thanks!

[LuckyTran]

Originally Posted by elowfoam

In order to get the total turbulent dissipation rate from CFD for an entire static mixer, can I take an average of epsilon (m2/s2) over the entire region of fluid surrounding the device?

?????


You just integrate it over the volume (i.e. summation)

[elowfoam]

Thank you!