# is shear stress calculated by paraview tangential?

**URL:** https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529
**Category:** ParaView Support
**Tags:** opengl, exodus, python, releases, proposal
**Created:** [July 17, 2023, 5:04pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529 "2023-07-17T17:04:37Z")
**Posts on this page:** 9
**Page:** 1

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### Author: ![Ahmadna94](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/a87d85/32.png) [@Ahmadna94](https://discourse.paraview.org/u/Ahmadna94)
#### Post date: [July 17, 2023, 5:04pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/1 "2023-07-17T17:04:37Z")

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In my post-processing workflow with ParaView, I am calculating shear stress on each point using the velocity field. I would like to confirm whether the shear stress calculated by ParaView represents the tangential component of shear stress. Could someone please provide a reference or documentation that supports this?

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### Author: ![cory.quammen](https://discourse.paraview.org/user_avatar/discourse.paraview.org/cory.quammen/32/11193_2.png) [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [July 21, 2023, 5:55pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/2 "2023-07-21T17:55:29Z")

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Hi @Ahmadna94 . What filter in ParaView are you using the compute shear stress?

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### Author: ![Ahmadna94](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/a87d85/32.png) [@Ahmadna94](https://discourse.paraview.org/u/Ahmadna94)
#### Post date: [July 21, 2023, 5:59pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/3 "2023-07-21T17:59:42Z")

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Hi dear Cory Quammen, the WallShearStress filter for a 2D slice on a solid surface. As I understand it calculated based on tangential velocity field on the surface. but once I extract data as a csv, I face by Values in x and y direction for shear stress. I’m want to know if the amplitude of x-y values would be the tangential value of shear stress on each point of surface or no?

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### Author: ![cory.quammen](https://discourse.paraview.org/user_avatar/discourse.paraview.org/cory.quammen/32/11193_2.png) [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [July 21, 2023, 8:07pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/4 "2023-07-21T20:07:43Z")

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I’m sorry, I don’t see a Wall Shear Stress filter in ParaView downloaded from [www.paraview.org/download](http://www.paraview.org/download). Where did you obtain your ParaView, and what version is it?

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### Author: ![olearypatrick](https://discourse.paraview.org/user_avatar/discourse.paraview.org/olearypatrick/32/9_2.png) [@olearypatrick](https://discourse.paraview.org/u/olearypatrick)
#### Post date: [July 21, 2023, 8:10pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/5 "2023-07-21T20:10:28Z")

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Are you using this [https://www.cfd-online.com/Forums/openfoam-post-processing/73307-paraview-wall-shear-stress.html](https://www.cfd-online.com/Forums/openfoam-post-processing/73307-paraview-wall-shear-stress.html)

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### Author: ![Ahmadna94](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/a87d85/32.png) [@Ahmadna94](https://discourse.paraview.org/u/Ahmadna94)
#### Post date: [July 21, 2023, 8:13pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/6 "2023-07-21T20:13:39Z")

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I have done a CFD simulation using OpenFOAM and doing post-processing with paraview. Have a look at the attached screenshot.

 ![Screenshot from 2023-07-21 22-12-16](https://discourse.paraview.org/uploads/default/original/2X/5/5a0b9d7040c66db52ac9fde4a51837ce792be5fc.png)

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### Author: ![Ahmadna94](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/a87d85/32.png) [@Ahmadna94](https://discourse.paraview.org/u/Ahmadna94)
#### Post date: [July 21, 2023, 8:15pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/7 "2023-07-21T20:15:39Z")

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It is almost the same, Just I had set wall shear stress as a variable to calculate before doing the simulation.

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### Author: ![olearypatrick](https://discourse.paraview.org/user_avatar/discourse.paraview.org/olearypatrick/32/9_2.png) [@olearypatrick](https://discourse.paraview.org/u/olearypatrick)
#### Post date: [July 21, 2023, 8:17pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/8 "2023-07-21T20:17:44Z")

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I would post your question on the openfoam cfd question site. I believe it’s their function object or internal function.

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### Author: ![Ahmadna94](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/a/a87d85/32.png) [@Ahmadna94](https://discourse.paraview.org/u/Ahmadna94)
#### Post date: [July 21, 2023, 8:21pm UTC](https://discourse.paraview.org/t/is-shear-stress-calculated-by-paraview-tangential/12529/9 "2023-07-21T20:21:08Z")

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Thank you for your kind help. As I see, it is a question for many researchers.