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-   -   Simulations Flow 3D over Flat plate (http://www.cfd-online.com/Forums/openfoam/117150-simulations-flow-3d-over-flat-plate.html)

baoaero May 3, 2013 05:04

Simulations Flow 3D over Flat plate
 
Hi all,
I am new user using OpenFoam,. I am making simulation flow steady over the flat plate 3D with dim ( c =0.2 m and l=0.7 m). What solver can i use for solving this proplem. I had tried many time but had many errors. I want to calculate the lift, drag cofficient on the flat plate but i don't know how do it? I wish i have help me for solving this proplem from all members of CFD online.
Thank you so much..

fumiya May 4, 2013 07:23

Hi,

For the steady simulations of incompressible, turbulent flow, you can use simpleFoam solver.
For the steady simulations of compressible, turbulent flow, you can use rhoSimpleFoam solver.

You can use the forceCoeffs function object to calculate the force coefficients.
and find the information about how to use it by doing the motorBike tutorial.

Best regards,
Fumiya

baoaero May 9, 2013 04:56

Dear Fumiya
I had done this proplem along your intructions and had result Cm 8.27999e-05 Cd 0.000173674 Cl 0.00082136. Conditions of Promblem: velocity inlet 1 m/s, nutida 0.001 at inlet and Zerogradient at other boundary, pressure equal 0 at outlet and ZeroGradient at outlet. At wall (flat plate) fix value
(0,0,0) velocity and Pressure is zeroGradient. Dimmentions of flat plate (0.4mx1mX0.01m). Model mesh 220.000 point.
I dont have much experience in CFD Calculations, I don't know that is Result is good or bad ? I dont know edit where part of problem for having good result?
Would you mind help solve this proplem? I am do my thesis for graduate university. With project "Simulation flow over Propeller". very difficult.
I wish i have your help.
Thank you very much.
Best regards,
Boundary condition
p
dimensions [0 2 -2 0 0 0 0];

internalField uniform 0;

boundaryField
{
wall
{
type zeroGradient;
}

symmetry
{
type symmetryPlane;
}

inlet
{
type fixedValue;
value uniform 0;
}

outlet
{
type fixedValue;
value uniform 0;
}
}
U
dimensions [0 1 -1 0 0 0 0];

internalField uniform (1 0 0);

boundaryField
{
wall
{
type fixedValue;
value uniform (0 0 0);
}

symmetry
{
type symmetryPlane;
}

inlet
{
type fixedValue;
value uniform (1 0 0);
}

outlet
{
type zeroGradient;
}
}
nuTida
dimensions [0 2 -1 0 0 0 0];

internalField uniform 0.001;

boundaryField
{
wall
{
type zeroGradient;
}
symmetry
{
type symmetryPlane;

}

inlet
{
type fixedValue;
value uniform 0.001;
}

outlet
{
type zeroGradient;
}
}
nut
dimensions [0 2 -1 0 0 0 0];

internalField uniform 0.001;

boundaryField
{
wall
{
type zeroGradient;

}
symmetry
{
type symmetryPlane;
}
inlet
{
type fixedValue;
value uniform 0.001;
}

outlet
{
type zeroGradient;

}

}

baoaero May 13, 2013 21:43

Dear all
who are you help me solve this Problem...It very difficult. I try many time but not success....I wish you can help me....
Thanks a lot...
Bao

fredo490 May 14, 2013 02:52

For a speed of 1m/s you can use simpleFoam (steady state, incompressible sover). With a very fine mesh (y+ of less than 1), you can use k-omega SST that will give you the best boundary layer solution.

If you don't know much about OpenFoam, you can try http://www.sim-flow.com/#
It is an "automatic" way to generate an OpenFoam case. Then you can study the files and try to understand the settings.

baoaero May 15, 2013 00:10

Dear all
I had done download simFlow sonfware. But i can not install into Unbutu 12.04LS (32bit). Would you mind can help me for install simFlow. I had done follow indtructions on website www.simFlow.com but not success because i can not run the file install after finishing dowload. (i tried many tiem but it was not run). I had check "Allow executing files as program" after double clik on file and IT NOT RUN.
I wish you can help me install SimFlow for studing in University? Thanks a lot...i glad to you...
Bao

JR22 May 15, 2013 08:23

I tried SimFlow, and the Windows version worked for me, the Ubuntu/Linux one didn't. Try contacting their support staff as it is a Beta and they are likely trying to figure out what goes wrong. Give them as much information as you can (i.e., your system details, the steps to reproduce your problem, and whatever logs or error messages that are appropriate).

AnetaC June 7, 2013 05:53

Dear DANG QUOC BAO,
please check FAQ and Q&A on www.sim-flow.com, there you will undoubtedly find the solution to your problem.


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