[Paraview] Interpolation error in paraview

[HongchaoWang]

I'm just wondering what interpolation scheme is used for data manipulation
in Paraview?

 

I'm using Paraview 5.2.0. I want to measure the velocity very close to a
wall surface so that I can obtain the wall shear stress. However, I found
the velocity measured using Paraview is different from the results I have
obtained using the postprocessing tool in OpenFoam. Compared with the
analytical solution which is already known in my case, Paraview result is
worse and is 10% smaller than the analytical solution while the OpenFoam
result agrees with the analytical solution very well. With finer mesh, the
difference between the Paraview and OpenFoam results becomes smaller, so I
believe the difference is due to the interpolation error.

 

Anyone who has experience on this problem? Is there any advanced
interpolation scheme that I can use in Paraview?

 

 

Many thanks,

Wilson  

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