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wall shear stress in tecplot

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Old   April 21, 2014, 01:01
Default wall shear stress in tecplot
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Ali reza
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hello everyone
I want too see wall shear stress contours in tecplot.I have got the answers from openfoam and I have calculated wall shear stresses in openfoam so I expect to be able to see these contours when I load data from openfoam however I cant find any tab or menu which shows wall shear stressed that also have read from openfoam.
is there any idea?
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Old   September 9, 2016, 03:40
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Charles K.
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Hello 1988,

I know this post is old but I have exactly the same problem. Did you solve your problem and if yes, do you remember how?

Maybe someone else faced this problem too.

Cheers!
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Old   September 13, 2016, 07:09
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Quote:
Originally Posted by McCharles View Post
Hello 1988,

I know this post is old but I have exactly the same problem. Did you solve your problem and if yes, do you remember how?

Maybe someone else faced this problem too.

Cheers!
Hi
you should add a code like this to your 0 folder (based on your BCs)
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| =========                 |                                                 |
| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
|  \\    /   O peration     | Version:  2.2.0                                 |
|   \\  /    A nd           | Web:      www.OpenFOAM.org                      |
|    \\/     M anipulation  |                                                 |
\*---------------------------------------------------------------------------*/
FoamFile
{
    version     2.0;
    format      ascii;
    class       volVectorField;
    location    "0";
    object      wallShearStress;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 2 -2 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    outlet
    {
        type            calculated;
        value           uniform (0 0 0);
    }
    inlet
    {
        type            calculated;
        value           uniform (0 0 0);
    }
    defaultFaces
    {
        type            calculated;
        value           uniform (0 0 0);
    }
}


// ************************************************************************* //
and then after running the code and having results, write this commend in terminal:
Code:
wallShearStress
then it starts to calculate the wss and then when it is imported to tecplot it will have different name (for example enthalpy or etc) try to find them in the contour tab.

+you will have three WSS in tecplot for each direction and by adding this formula you can calculate WSS magnitude (Go to Data > Alter > Specify Equations and enter the following equation:
)
Code:
{WSS Magnitude} = sqrt({WSSx}**2+{WSSy}**2+{WSSz}**2)
Best
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Old   September 13, 2016, 07:14
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Charles K.
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Hello 1988,

thanks for your reply. Unfortunately, I already concluded my calculations. I used the command "wallShearStress" to postprocess the WSS in OpenFoam. Now I have a new file for each time step containing the calculated wall shear stresses, but Tecplot isn't able to regognize them... Is there no other way to import the WSS in tecplot afterwards?
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Old   September 13, 2016, 07:30
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Ali reza
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Quote:
Originally Posted by McCharles View Post
Hello 1988,

thanks for your reply. Unfortunately, I already concluded my calculations. I used the command "wallShearStress" to postprocess the WSS in OpenFoam. Now I have a new file for each time step containing the calculated wall shear stresses, but Tecplot isn't able to regognize them... Is there no other way to import the WSS in tecplot afterwards?
As far as I remeber it was possible to calculate averaged WSS based on a time dependent results. I mean it is possible to again add a function to tecplot to calculate averaged wall shear stress for a range of time steps.
hah I found averaged WSS contours by paraView (it was easy) as I had not found any way in tecplot to calculate these aounts.
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Old   September 15, 2016, 02:33
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Charles K.
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Yes, I did it in paraView too by choosing wallShearStress in the Variables-List and the desired surface.
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Old   September 17, 2016, 08:55
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Quote:
Originally Posted by 1988 View Post
hello everyone
I want too see wall shear stress contours in tecplot.I have got the answers from openfoam and I have calculated wall shear stresses in openfoam so I expect to be able to see these contours when I load data from openfoam however I cant find any tab or menu which shows wall shear stressed that also have read from openfoam.
is there any idea?
i did this and now i want to plot time-average wss based on axial positin on a curved tube
do you know how can i define the axial of a curved tube as the x ?
یعنی محور وای بشه مقادیر تنش برشی و محور ایکس بشه محور لوله خمیده

Last edited by navid.a; September 19, 2016 at 12:50.
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Old   September 23, 2016, 03:52
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Ali reza
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Hi Navid
watch this:
https://www.youtube.com/watch?v=9ckpOcNmk1w
best
Quote:
Originally Posted by navid.a View Post
i did this and now i want to plot time-average wss based on axial positin on a curved tube
do you know how can i define the axial of a curved tube as the x ?
یعنی محور وای بشه مقادیر تنش برشی و محور ایکس بشه محور لوله خمیده
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