How to determine the k and epsilon values of turbulence k-epsilon model？

MFiX How to
#1

Hello, researcher! I encounter a problem in the value of k and epsilon in the k-epsilon model. I studied the relevant documents of the website, did not find the value of k, epsilon relevant content. How are these two values determined? Furthermore, what is the difference between the k and epsilon values of the (IC
) initial condition and the (BC) boundary condition? Is the value of the boundary condition the maximum? Looking forward to solving this problem! Thank you!

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#2

These are model parameters which it is up to you to specify. I suggest you look at some references for the K-epsilon model, starting here K-epsilon models -- CFD-Wiki, the free CFD reference

#3

Thanks for the advice, very helpful for me.

#4

I was about to ask about the same myself actually, as I haven’t got this to work at all on simulations with liquids, only gases. Is this an actual limitation? I get the same initial error always, no iteration is done, so I figure there must be something fundamentally wrong. I have been hesitating to post this as a possible bug.

#5

@kjetilbmoe - more details please! What have you tried and what errors are you seeing?

#6

Perhaps better to do this it in a different thread. My experience is only that I’ve got it to work in a TFM case with air, but not with water. Haven’t tried it out more than that.