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Flow laminar and stationary of water in a pipe |
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January 23, 2007, 23:16 |
Hello everybody,
For academ
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#1 |
New Member
Manuel Felipe Mejia De Alba
Join Date: Mar 2009
Posts: 10
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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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January 24, 2007, 03:12 |
I think the easiest way would
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#2 |
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Dragos
Join Date: Mar 2009
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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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January 24, 2007, 23:20 |
Thanks
I try and later as
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#3 |
New Member
Manuel Felipe Mejia De Alba
Join Date: Mar 2009
Posts: 10
Rep Power: 17 |
Thanks
I try and later ask questions |
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January 25, 2007, 20:27 |
Hi
Thanks in advance
whe
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#4 |
New Member
Manuel Felipe Mejia De Alba
Join Date: Mar 2009
Posts: 10
Rep Power: 17 |
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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January 26, 2007, 04:46 |
deltaT is not used in any of t
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#5 |
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Mattijs Janssens
Join Date: Mar 2009
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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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January 26, 2007, 04:51 |
All the time variable names in
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#6 |
Senior Member
Dragos
Join Date: Mar 2009
Posts: 648
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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. Dragos |
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March 24, 2007, 18:23 |
hi
I am trying to model simp
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#7 |
Guest
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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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