[nikos_fb16]

hi all,

i want to run a periodic channel with a fixed pressure gradient in channeloodles. In the transportProperties dictionary there is only an entry for Ubar but not for gradP.


In the file createGradP are the following lines:

IFstream gradPFile
(
runTime.path()/runTime.timeName()/"gradP.raw"
);


I am new to OpenFoam and to C++, do I have to create a file named gradP in my start time directory? If so, how must it look like.

Thanks for any answers, Nikos

[hadi]

Hi Nikolaos,

I am new to openFoam too, i am also running simulations using channelOodles solver, for my understanding to fix a pressure gradient, you have to modify channelOodles.C, by adding a linear pressure gradient that can be a constant added to the momentum equation in the streamwise direction, and then u calculate Ubulk that will oscillate around a mean value.
I didn't try it yet,so please anyone correct me if i am wrong.

Hadi