# Extracting surface

**URL:** https://discourse.paraview.org/t/extracting-surface/3226
**Category:** ParaView Support
**Created:** [December 23, 2019, 1:56pm UTC](https://discourse.paraview.org/t/extracting-surface/3226 "2019-12-23T13:56:39Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![vishruthdilip](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/v/f9ae1b/32.png) [@vishruthdilip](https://discourse.paraview.org/u/vishruthdilip)
#### Post date: [December 23, 2019, 1:56pm UTC](https://discourse.paraview.org/t/extracting-surface/3226/1 "2019-12-23T13:56:39Z")

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Hello all,

I am working with a CFD solver based on the finite point method. My results are Ensight case files. I basically have two results files. One that contains the geometry (BE\_model.case) and the other that contains the solution i.e the flow domain (model.case). I wish to extract a surface which is one of my outlets contained within the BE\_model.case file , and plot the mass flow across it.  
Could someone tell me how to do this?

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### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [January 6, 2020, 12:02pm UTC](https://discourse.paraview.org/t/extracting-surface/3226/2 "2020-01-06T12:02:24Z")

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Extract Selection ?