Usage of fvm and fvc
Can anyone help me to understand how to use fvm and fvc?
Here in the forum I found one helpfull thread:
Let's take an example, the U-equation in piso-Foam:
An other approach
I think, I understand the difference between explicit (fvc) and implicit derivative (fvm). If I have an equation like u=x*x, u can be calculated easily, it is fvc. An implicit equation is the example (2.12) [A][x] = [b]. Back to dU/dt.
I may write dU/dt = u(t)-u(t-1). Explicit. fvc. Wrong. --> How do I know when to use which namespace?
Thanks a lot for your help!
When calculating U, the field B is kept constant. If it is constant, it may be calculated/readed easily (explicitly) = fvc.
=> So whenever there is a U in the UEqn, I have to write fvm, if it is not fvc. Can someone confirm that or say it better?
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