# boolian operation of two files
**URL:** https://discourse.paraview.org/t/boolian-operation-of-two-files/8596
**Category:** ParaView Support
**Created:** [December 8, 2021, 4:20pm UTC](https://discourse.paraview.org/t/boolian-operation-of-two-files/8596 "2021-12-08T16:20:43Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@hulli](https://discourse.paraview.org/u/hulli)
#### Post date: [December 8, 2021, 4:20pm UTC](https://discourse.paraview.org/t/boolian-operation-of-two-files/8596/1 "2021-12-08T16:20:43Z")
Hi all,
It might be easy, but I did not succeed … I have two vtk files loaded. One is a 3D volume mesh, CFD data from openfoam. The second one is a Isosurface that I computed with matlab and exported that one into vtk. Both files are accepted by paraview without any errors.
But how can I use the isosurface to intersect it with the 3D mesh from openfoam. I tried clipping using the scalar entry, however I can not access the data from the volume. Append data did also not help. Basically, I want a boolean operation of the openfoam mesh. Thank you sooo much for any help
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [December 8, 2021, 4:27pm UTC](https://discourse.paraview.org/t/boolian-operation-of-two-files/8596/2 "2021-12-08T16:27:45Z")
Not easy and not trivial with ParaView I’m afraid.
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### Author:  [@hulli](https://discourse.paraview.org/u/hulli)
#### Post date: [December 8, 2021, 4:29pm UTC](https://discourse.paraview.org/t/boolian-operation-of-two-files/8596/3 "2021-12-08T16:29:09Z")
ok thank you anyway