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-   -   Flow laminar and stationary of water in a pipe (http://www.cfd-online.com/Forums/openfoam-solving/59772-flow-laminar-stationary-water-pipe.html)

manuel January 24, 2007 00:16

Hello everybody, For academ
 
Hello everybody,

For academic purposes, I try to carry out a model of flow laminar and stationary of water in a pipe.

what should i use solver to solve my model, icoFoam, simpleFoam, turbFoam etc.
And which modifications i have to do.

beforehand thanks
I apologize for my questions, I am self-taught in CFD

dmoroian January 24, 2007 04:12

I think the easiest way would
 
I think the easiest way would be to use simpleFoam and change in constant/turbulenceProperties:
turbulenceModel laminar;

Dragos

manuel January 25, 2007 00:20

Thanks I try and later as
 
Thanks

I try and later ask questions

manuel January 25, 2007 21:27

Hi Thanks in advance whe
 
Hi

Thanks in advance

when i will do the model simple foam , i have some questions:

What i have put in the control dict, respect the time: starTime, endTime and deltaT, if the model is stady-state?

What value of K, epsilon, R nuTilda, i have to use at the walls, the in and out, so i do the model with the wedge condictions, about that only there is one wall and one inlet and autlet.

what value i have to do in the dict turbulenceProperties aside the laminar in the turbulenceModel?

I apologize for my questions, I am self-taught in CFD

Manuel

mattijs January 26, 2007 05:46

deltaT is not used in any of t
 
deltaT is not used in any of the equations. The time is purely an iteration counter so set e.g.

deltaT = 1
startTime = 0
endTime = number_of_wanted_iterations

in turbulenceProperties set 'turbulence' to off. The choice of K,eps,R becomes irrelevant since they are not used in any calculation (they probably are not read as well)

dmoroian January 26, 2007 05:51

All the time variable names in
 
All the time variable names in the controlDict will represent instead the iteration number.
Since you don't solve a turbulent flow, you don't need to specify anything for k, epsilon, R, nuTilda, because they are not computed; just remove those files from the time directory.

Dragos

liamm March 24, 2007 19:23

hi I am trying to model simp
 
hi
I am trying to model simple laminar pipe flow in both openfoam and ansys cfx. I have completed the simulation however to get the same answer on openfoam as i do in cfx i have to do over three times the number of iterations. is there anything i can do with the solver settings to speed this up? they are all left at there default settings.
I am using simplefoam with the turbulence turned off

and is it possible to graph the convergence of the results through each iteration?

Thanks
Liam


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