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Forum: OpenFOAM Running, Solving & CFD

May 19, 2021, 05:57

Replies: 20

Why we need rhoEqn.H in rhoPimpleFoam

Views: 3,285

Posted By Tobermory

Well, this hinges on how the following is treated...

Well, this hinges on how the following is treated by the two different thermo approaches:
rho = thermo.rho();
(see my schematic in #17 for the role that this plays during the pressure loop).
...

Forum: OpenFOAM Running, Solving & CFD

March 15, 2021, 09:53

Replies: 20

Why we need rhoEqn.H in rhoPimpleFoam

Views: 3,285

Posted By Tobermory

Correct - but this rho value gets overwritten...

Correct - but this rho value gets overwritten almost immediately when the rhoEqn is solved, so all it does is provide a better rho value for the source term in the rhoEqn, if there is one. I've...

Forum: OpenFOAM Running, Solving & CFD

March 11, 2021, 16:28

Replies: 20

Why we need rhoEqn.H in rhoPimpleFoam

Views: 3,285

Posted By Tobermory

Aaah - what confused me is that the definition...

Aaah - what confused me is that the definition (in the .C file) is empty for psiThermo:
void Foam::psiThermo::correctRho(const Foam::volScalarField& deltaRho)
{}

and only has any action for...

Forum: OpenFOAM Running, Solving & CFD

March 11, 2021, 13:22

Replies: 20

Why we need rhoEqn.H in rhoPimpleFoam

Views: 3,285

Posted By Tobermory

I always find it easier to draw out a flow...

I always find it easier to draw out a flow diagram ... this is what I think the main structure of rhoPimpleFoam is, with different "columns" for the different options of steady, unsteady, rhoSimple...

Forum: OpenFOAM Running, Solving & CFD

March 11, 2021, 10:05

Replies: 20

Why we need rhoEqn.H in rhoPimpleFoam

Views: 3,285

Posted By Tobermory

Edit On reflection, a zero residual does not...

Edit On reflection, a zero residual does not mean that the solver is doing nothing - refer to this post...

Forum: OpenFOAM Running, Solving & CFD

March 11, 2021, 09:56

Replies: 20

Why we need rhoEqn.H in rhoPimpleFoam

Views: 3,285

Posted By Tobermory

Tobi a few additions. Edit: agreed. ...

Tobi

a few additions.

Edit: agreed.

yes - absolutely - I had left out the discussion of SIMPLEC.

I don't think that I agree with this point. There is only one pressure field,...

Forum: OpenFOAM Running, Solving & CFD

March 11, 2021, 06:14

Replies: 20

Why we need rhoEqn.H in rhoPimpleFoam

Views: 3,285

Posted By Tobermory

Hi Tobi, I tried commenting on your YT video,...

Hi Tobi, I tried commenting on your YT video, but for some reason it would not show up ... maybe there is some delay for long posts? Anyway, let me drop my thoughts here instead/as well. I have...

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