# Output Fz in 3DH1D simulations

**URL:** https://forum.nektar.info/t/output-fz-in-3dh1d-simulations/26
**Category:** General
**Created:** [September 17, 2026, 7:20am UTC](https://forum.nektar.info/t/output-fz-in-3dh1d-simulations/26 "2026-09-17T07:20:22Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![gaoak](https://forum.nektar.info/letter_avatar_proxy/v4/letter/g/94ad74/32.png) [@gaoak](https://forum.nektar.info/u/gaoak)
#### Post date: [September 17, 2026, 7:20am UTC](https://forum.nektar.info/t/output-fz-in-3dh1d-simulations/26/1 "2026-09-17T07:20:22Z")

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In a channel flow, the wall shear stress is in the z direction, but FilterAeroForces only output Fx and Fy components. Can we extend this force ouput to z direction?