- #1
- 893
- 483
Hey all!
I am trying to understand the terms in the source-side of the k-epsilon transport equations. My only reference on this so far has been the wikipedia article (in my defense, it's not in Landau! the gospel has forsaken me
). If you have a reference that goes into gory detail on the transport equations, that'll probably answer my questions.
But my specific questions are:
1) How is the double contraction of the strain rate tensor related to "production of k (or epsilon)"? My gut reaction is that eddy viscosity times strain rate is Reynolds stress, and Reynolds stress contracted with strain rate is somehow like a "turbulent work" thingy, but I'd like to know more. Also that doesn't explain the term in the epsilon transport equation.
2) How is ##\epsilon^2/k## related to the rate of decay of ##\epsilon##? I get the dimensions are right, but is that all there is to it?
3) How is ##\epsilon## different from ##\omega## in the k-omega model?
I am trying to understand the terms in the source-side of the k-epsilon transport equations. My only reference on this so far has been the wikipedia article (in my defense, it's not in Landau! the gospel has forsaken me
). If you have a reference that goes into gory detail on the transport equations, that'll probably answer my questions.But my specific questions are:
1) How is the double contraction of the strain rate tensor related to "production of k (or epsilon)"? My gut reaction is that eddy viscosity times strain rate is Reynolds stress, and Reynolds stress contracted with strain rate is somehow like a "turbulent work" thingy, but I'd like to know more. Also that doesn't explain the term in the epsilon transport equation.
2) How is ##\epsilon^2/k## related to the rate of decay of ##\epsilon##? I get the dimensions are right, but is that all there is to it?
3) How is ##\epsilon## different from ##\omega## in the k-omega model?