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-   -   Steadystate incompressible laminar Newtonianfluids solver (http://www.cfd-online.com/Forums/openfoam-pre-processing/62213-steadystate-incompressible-laminar-newtonianfluids-solver.html)

anja January 27, 2006 10:01

Hi, does someone know, whet
 
Hi,

does someone know, whether there is a solver for:
steady-state, incompressible, laminar, Newtonian-fluids

Thanks a lot,
Anja

eugene January 27, 2006 10:34

Sure, just run simpleFoam and
 
Sure, just run simpleFoam and switch the turbulence model to laminar.

anja January 27, 2006 15:34

And how do I have to do that?
 
And how do I have to do that? (I really can need the advice)

Thanks again

anja January 27, 2006 15:38

And what about the change from
 
And what about the change from non-Newtonian fluids of simpleFoam to Newtonian fluids?

eugene January 28, 2006 05:15

simpleFoam uses Newtonian flui
 
simpleFoam uses Newtonian fluid by default.
Open the "turbulenceProperties" file in the "constant" sub-directory and change the turbulence model from "RNGkEpsilon" to "laminar".

anja February 1, 2006 09:33

And afterwards turbulence off?
 
And afterwards turbulence off?

And what about all the other files in which parameters for the turbulent calculation are used?

eugene February 1, 2006 09:58

Sure switch turbulence off if
 
Sure switch turbulence off if you like. The rest should just work.

brooksmoses February 1, 2006 21:24

As an alternate solution, I en
 
As an alternate solution, I ended up writing a small variant of simpleFoam for my own work that does exactly what you want -- incompressible, Newtonian, steady-state, laminar flow -- without any additional "features" like turbulence or viscosity models.

It's a pretty trivial combination of parts from the existing OpenFOAM applications, so I can't really claim any ingenuity in creating it, but to save you the trouble of recreating it I've put a copy online here: http://dpdx.net/software/openfoam/st...w_1.0.0.tar.gz .

There's a README.txt file in the .tar.gz file that covers what bits go where to install it.

anja February 23, 2006 10:09

Okay, one more question on tha
 
Okay, one more question on that topic.
Why do I need a time-step for a steady-state solver?

hjasak February 23, 2006 10:17

It's not a time step, just an
 
It's not a time step, just an iteration counter - you can set the deltaT to whatever you like. I usually use 1.

Enjoy,

Hrv

anja March 23, 2006 06:43

Hi, I'm still using simpleF
 
Hi,

I'm still using simpleFoam as laminar solver. The problem is that the calculation takes that long. I've already changed the solver for p to AMG.
Is there any suggestion for the endtime in the controldict?


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