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Flow laminar and stationary of water in a pipe

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Old   January 24, 2007, 00:16
Default Hello everybody, For academ
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Manuel Felipe Mejia De Alba
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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
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Old   January 24, 2007, 04:12
Default I think the easiest way would
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I think the easiest way would be to use simpleFoam and change in constant/turbulenceProperties:
turbulenceModel laminar;

Dragos
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Old   January 25, 2007, 00:20
Default Thanks I try and later as
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Manuel Felipe Mejia De Alba
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Thanks

I try and later ask questions
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Old   January 25, 2007, 21:27
Default Hi Thanks in advance whe
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Manuel Felipe Mejia De Alba
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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
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Old   January 26, 2007, 05:46
Default deltaT is not used in any of t
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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)
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Old   January 26, 2007, 05:51
Default All the time variable names in
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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.

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Old   March 24, 2007, 19:23
Default hi I am trying to model simp
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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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