Distance function

odzaru · February 6, 2018, 08:58

Dear OpenFoam users,

I have a simple (but a bit confusing me

) purpose to study different approaches for wall distance computations, typically used in turbulence computations, but I have no idea where in Openfoam I have to start to compute or plot it.

Can it be computed without running RANS or LES model?

As far as I know there are three options to compute the wall distance in OpenFoam: using meshWave, Poisson or Eikonal euqation. The later one is of my interest.

Could anyone guide me with this please?

Thanks,
Dmitry

piu58 · February 6, 2018, 09:29

> Can it be computed without running RANS or LES model?

Yes, it is called DNS.

odzaru · February 6, 2018, 09:42

Well, sure, but seriously speaking I need to test the wall distance without running any NS solver.

February 6, 2018, 08:58	Distance function	#1
odzaru New Member Dmitry Join Date: Oct 2013 Posts: 5 Rep Power: 13	Dear OpenFoam users, I have a simple (but a bit confusing me ) purpose to study different approaches for wall distance computations, typically used in turbulence computations, but I have no idea where in Openfoam I have to start to compute or plot it. Can it be computed without running RANS or LES model? As far as I know there are three options to compute the wall distance in OpenFoam: using meshWave, Poisson or Eikonal euqation. The later one is of my interest. Could anyone guide me with this please? Thanks, Dmitry

February 6, 2018, 09:29		#2
piu58 Senior Member Uwe Pilz Join Date: Feb 2017 Location: Leipzig, Germany Posts: 744 Rep Power: 16	> Can it be computed without running RANS or LES model? Yes, it is called DNS. __________________ Uwe Pilz -- Die der Hauptbewegung überlagerte Schwankungsbewegung ist in ihren Einzelheiten so hoffnungslos kompliziert, daß ihre theoretische Berechnung aussichtslos erscheint. (Hermann Schlichting, 1950)

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February 6, 2018, 09:42		#3
odzaru New Member Dmitry Join Date: Oct 2013 Posts: 5 Rep Power: 13	Well, sure, but seriously speaking I need to test the wall distance without running any NS solver.