# Wall\_shear\_stress on Field Files

**URL:** https://discourse.paraview.org/t/wall-shear-stress-on-field-files/15340
**Category:** ParaView Support
**Created:** [September 2, 2024, 8:18pm UTC](https://discourse.paraview.org/t/wall-shear-stress-on-field-files/15340 "2024-09-02T20:18:10Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Pranay\_006](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/p/c5a1d2/32.png) [@Pranay\_006](https://discourse.paraview.org/u/Pranay_006)
#### Post date: [September 2, 2024, 8:18pm UTC](https://discourse.paraview.org/t/wall-shear-stress-on-field-files/15340/1 "2024-09-02T20:18:10Z")

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I am trying to extract wall shear stress or gradient dU/dy across the airfoil profile using gradient and methods proposed in [Manipulation of field files - ParaView Support - ParaView](https://discourse.paraview.org/t/manipulation-of-field-files/14774/4) and [Calculation of Drag, Wall shear stress, Lift - ParaView Support - ParaView](https://discourse.paraview.org/t/calculation-of-drag-wall-shear-stress-lift/15329). However I am unable to process the mesh. It would be helpful if you can tell me

1. To plot the dU/dy across the airfoil surface.
2. Get the product of dU/dy \* mu \* surface normals by performing generate surface normals and use the value of the gradient.

Link to example field files: [Re10000](https://fraunhofer-my.sharepoint.com/:f:/g/personal/sai_pranay_padakanti_iwes_fraunhofer_de/EnkRZbHw09VLvTI6elfo_McBVKEMRE1uTNJuJ2B8EXUJJQ?e=VnBjeu)

Thank you  
Pranay