Hi, I try to modify the kEp
I try to modify the kEpsilon model and I wanted to access k_.oldTime() - the application compiled and ran - but the value k_.oldTime() was always the current k_ value.
k_ is defined as:
you can try
Info << "k_.oldTime()" << endl;
Info << "k_" << endl;
to see what I mean.
hope you have an idea ...
Which solver are you using - i
Which solver are you using - is it simpleFoam by any chance ;)
Have a look at system/fvSchemes and tell me what differencing scheme is used ok k (is it steadyState by any chance)?
The code MUST be correct on this if you are time-stepping; otherwise all my calculations would be wrong.
Hi, you are right I forgot
you are right I forgot about the turbulent kinetic energy equation: there is an ddt(k_) - so it should work(means the code stores the previous k_ somewhere).
But where is the problem then? - because k_ is calculated it changes every timestep - but when I try to access k_.oldtime() directly from the kEpsilon subroutine (I am not using the build in ddt function - not because I don't want to because I don"t know how to specify my variable to accomplish that) I get the value of the current k back.
The same thing !works! for U_ so I really think it is something about variable definition or I am missing an include because evidently in the ddt subroutine k_.oldTime() is returning a value.
I am using turbFoam and a "CrankNicholson 0.5" ddt scheme.
hope you got some ideas
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