# Smooth of flow and ventricles
**URL:** https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263
**Category:** ParaView Support
**Tags:** vtk
**Created:** [November 16, 2023, 10:54am UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263 "2023-11-16T10:54:17Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@mar.premi](https://discourse.paraview.org/u/mar.premi)
#### Post date: [November 16, 2023, 10:54am UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/1 "2023-11-16T10:54:17Z")
Hi there,
I’m importing vtk data with velocity field and relative contours.
In the software before I made an interpolation and so I have a pretty ugly contours
I found the filter smooth to adjust the contour but there is some way to smooth also the flow out of the contours? Because if I use Smooth filter also for the 4dflow it smooth also the inside and I don’t want that.
Do you have any suggestions?
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### Author:  [@mar.premi](https://discourse.paraview.org/u/mar.premi)
#### Post date: [November 16, 2023, 10:58am UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/2 "2023-11-16T10:58:02Z")
Also do you know how to remove this?
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### Author:  [@Francois\_Mazen](https://discourse.paraview.org/u/Francois_Mazen)
#### Post date: [November 17, 2023, 11:34am UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/3 "2023-11-17T11:34:27Z")
Hi @mar.premi !
> [@mar.premi](#):
>
> it smooth also the inside
Maybe extract surface before applying your filter would avoid the inside smoothing?
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### Author:  [@mar.premi](https://discourse.paraview.org/u/mar.premi)
#### Post date: [November 17, 2023, 11:37am UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/4 "2023-11-17T11:37:50Z")
How can I do that? Do I apply it on the contour? But then how can I do?
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### Author:  [@mar.premi](https://discourse.paraview.org/u/mar.premi)
#### Post date: [November 17, 2023, 11:39am UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/5 "2023-11-17T11:39:33Z")
Can you give me the step? Thank you
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### Author:  [@Francois\_Mazen](https://discourse.paraview.org/u/Francois_Mazen)
#### Post date: [November 17, 2023, 12:44pm UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/6 "2023-11-17T12:44:49Z")
I may misunderstood your question. Contour are usually surfaces so there is no inside.
In case of your previous computation output a contour volume (not surface), you may apply the “Extract Surface” filter to remove the “inside” of this volume. The filter is available in the Filters menu, then Alphabetical.
Could you please share your data?
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### Author:  [@mar.premi](https://discourse.paraview.org/u/mar.premi)
#### Post date: [November 17, 2023, 2:02pm UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/7 "2023-11-17T14:02:02Z")
It is a close surface with a flow inside.
[1998753LV\_3dflow\_vec\_ph001.vtk](https://discourse.paraview.org/uploads/short-url/kr9mV0pmkST7QOoa9DTvO16r5f.vtk) (694.0 KB)
[1998753LV\_3dflow\_vec\_ph002.vtk](https://discourse.paraview.org/uploads/short-url/lHQ6VEHi5HmB9jkLq9a9SCuf5Xx.vtk) (683.4 KB)
[1998753LV\_3dflow\_vec\_ph003.vtk](https://discourse.paraview.org/uploads/short-url/cDDKf3rRXxcPBaS3J1NOQ6amFrd.vtk) (620.6 KB)
[1998753LV\_3dflow\_vec\_ph004.vtk](https://discourse.paraview.org/uploads/short-url/bEdTae9PoBE4AhE1KkYunpNEu52.vtk) (562.0 KB)
[1998753LV\_3dflow\_vec\_ph005.vtk](https://discourse.paraview.org/uploads/short-url/uf8VX5lzmLREGWUFn0Idj21xVjS.vtk) (501.0 KB)
[1998753LV\_3dflow\_vec\_ph006.vtk](https://discourse.paraview.org/uploads/short-url/XAQ63zx3OoXatS40ohaE3SNOJM.vtk) (378.4 KB)
[1998753LV\_3dflow\_vec\_ph007.vtk](https://discourse.paraview.org/uploads/short-url/qaUqRnyTrSuxQTxBF52FAqPbe8x.vtk) (325.3 KB)
[1998753LV\_3dflow\_vec\_ph008.vtk](https://discourse.paraview.org/uploads/short-url/juUnnOm41qbohlxhepSA338yv0V.vtk) (280.9 KB)
[1998753LV\_3dflow\_vec\_ph009.vtk](https://discourse.paraview.org/uploads/short-url/aCc3Oj84H9LNthiwnDOkxxX8xkJ.vtk) (245.3 KB)
[1998753LV\_3dflow\_vec\_ph010.vtk](https://discourse.paraview.org/uploads/short-url/5PCGx4ZLKjou2fNvq1S4uxy7VKj.vtk) (220.8 KB)
[1998753LV\_3dflow\_vec\_ph011.vtk](https://discourse.paraview.org/uploads/short-url/3ZwK1CqTLqIaLRT7fPxKmHnMfRw.vtk) (223.4 KB)
[1998753LV\_3dflow\_vec\_ph012.vtk](https://discourse.paraview.org/uploads/short-url/lmVbsfndSBJkoOHDPfdmgUSOYjr.vtk) (236.2 KB)
[1998753LV\_3dflow\_vec\_ph013.vtk](https://discourse.paraview.org/uploads/short-url/zZHrYTj2cklm9gPd7LEpVr0iCD2.vtk) (255.5 KB)
[1998753LV\_3dflow\_vec\_ph014.vtk](https://discourse.paraview.org/uploads/short-url/dwHwvrTe21OabYg1yJBfMBemHax.vtk) (278.0 KB)
[1998753LV\_3dflow\_vec\_ph015.vtk](https://discourse.paraview.org/uploads/short-url/znODJyuPmh9ud24A4lf6FSMJe5N.vtk) (344.8 KB)
[1998753LV\_3dflow\_vec\_ph016.vtk](https://discourse.paraview.org/uploads/short-url/rs2OX8MnzoBMqx4YJdP8eErw5Hx.vtk) (420.7 KB)
[1998753LV\_3dflow\_vec\_ph017.vtk](https://discourse.paraview.org/uploads/short-url/ggrYIfvuDbwQE7Le8qlM89KT5UL.vtk) (477.7 KB)
[1998753LV\_3dflow\_vec\_ph018.vtk](https://discourse.paraview.org/uploads/short-url/1qBw7tTkqHnPCafSeNmdH5ZeArL.vtk) (514.9 KB)
[1998753LV\_3dflow\_vec\_ph019.vtk](https://discourse.paraview.org/uploads/short-url/fO58rehYTQJfY3HBHk2fk6XfTMa.vtk) (597.0 KB)
[1998753LV\_3dflow\_vec\_ph020.vtk](https://discourse.paraview.org/uploads/short-url/pz7xdYgkK64m8akxdX9xdcYwRbV.vtk) (595.3 KB)
[1998753LV\_3dflow\_vec\_ph021.vtk](https://discourse.paraview.org/uploads/short-url/1JW8j2l5nuqtGXMEZ02m7AALQ5J.vtk) (587.6 KB)
[1998753LV\_3dflow\_vec\_ph022.vtk](https://discourse.paraview.org/uploads/short-url/uDU7KPhFWXKDPfOJ3zs5KV1Steg.vtk) (579.3 KB)
[1998753LV\_3dflow\_vec\_ph023.vtk](https://discourse.paraview.org/uploads/short-url/fZ1dQQcwn7pzCUJC77csK4ykL9U.vtk) (573.4 KB)
[1998753LV\_3dflow\_vec\_ph024.vtk](https://discourse.paraview.org/uploads/short-url/ufYWt1U14fWrsCV5Kuc66Jxdl10.vtk) (578.2 KB)
[1998753LV\_3dflow\_vec\_ph025.vtk](https://discourse.paraview.org/uploads/short-url/hk5xKARQFXlw1TIG7i3rn5uu72J.vtk) (583.3 KB)
[1998753LV\_LV\_Endo\_ph001.vtk](https://discourse.paraview.org/uploads/short-url/ksPY7NbZusTyz3tU9II0sJO5AGl.vtk) (167.6 KB)
[1998753LV\_LV\_Endo\_ph002.vtk](https://discourse.paraview.org/uploads/short-url/w13Drvbb96k0OfAHwQG43o5GJUM.vtk) (167.7 KB)
[1998753LV\_LV\_Endo\_ph003.vtk](https://discourse.paraview.org/uploads/short-url/mQC6HwclQQCtoIHW2AVN02Uwi0q.vtk) (167.6 KB)
[1998753LV\_LV\_Endo\_ph004.vtk](https://discourse.paraview.org/uploads/short-url/81NyEFx7vMgtk3Ardbz73ImWuI6.vtk) (167.5 KB)
[1998753LV\_LV\_Endo\_ph005.vtk](https://discourse.paraview.org/uploads/short-url/cvIw3XAVth7rvsPKJiJqdEWZ8RM.vtk) (167.3 KB)
[1998753LV\_LV\_Endo\_ph006.vtk](https://discourse.paraview.org/uploads/short-url/kquJ24aR6NGpVPG5HJ7Vt9tGTa1.vtk) (152.7 KB)
[1998753LV\_LV\_Endo\_ph007.vtk](https://discourse.paraview.org/uploads/short-url/hVDB14ct5he5kwug7F2LSnD0Kov.vtk) (152.6 KB)
[1998753LV\_LV\_Endo\_ph008.vtk](https://discourse.paraview.org/uploads/short-url/8DnNTsDGpSgKlEc6qef5h94yV29.vtk) (152.3 KB)
[1998753LV\_LV\_Endo\_ph009.vtk](https://discourse.paraview.org/uploads/short-url/f73YTiTKoitYhl4PFGAPBHLbyk5.vtk) (152.2 KB)
[1998753LV\_LV\_Endo\_ph010.vtk](https://discourse.paraview.org/uploads/short-url/qdLSBKz5ZLcdpl12M00ZJJ4Qe99.vtk) (152.2 KB)
[1998753LV\_LV\_Endo\_ph011.vtk](https://discourse.paraview.org/uploads/short-url/nMhlHs6remfDoiCTGWXAj3SNbrd.vtk) (152.2 KB)
[1998753LV\_LV\_Endo\_ph012.vtk](https://discourse.paraview.org/uploads/short-url/rsN7RAWPzT1qosohE2jiWM5QR7T.vtk) (152.2 KB)
[1998753LV\_LV\_Endo\_ph013.vtk](https://discourse.paraview.org/uploads/short-url/s9QzhOOBcTPdBecZUn87SuEs4uU.vtk) (152.2 KB)
[1998753LV\_LV\_Endo\_ph014.vtk](https://discourse.paraview.org/uploads/short-url/uubSl0ygm4xRtpE307H1xaIAHQq.vtk) (152.1 KB)
[1998753LV\_LV\_Endo\_ph015.vtk](https://discourse.paraview.org/uploads/short-url/9LcXNdBVdk8n4yNf24lAwg2Kz2f.vtk) (152.3 KB)
[1998753LV\_LV\_Endo\_ph016.vtk](https://discourse.paraview.org/uploads/short-url/6HmzYZ4f783cKjsav5KcaxiuMYQ.vtk) (152.4 KB)
[1998753LV\_LV\_Endo\_ph017.vtk](https://discourse.paraview.org/uploads/short-url/5YkDrMZojPfE1Z818IntjUwCnIM.vtk) (152.6 KB)
[1998753LV\_LV\_Endo\_ph018.vtk](https://discourse.paraview.org/uploads/short-url/sr8z0MIJmBCnPApegmRfv7iVWZQ.vtk) (152.6 KB)
[1998753LV\_LV\_Endo\_ph019.vtk](https://discourse.paraview.org/uploads/short-url/hLyukPC1ZIthKAQ6MeLD56B478n.vtk) (167.1 KB)
[1998753LV\_LV\_Endo\_ph020.vtk](https://discourse.paraview.org/uploads/short-url/5KJaItefARDzh9VKJBBR5ODngmW.vtk) (167.1 KB)
[1998753LV\_3dflow\_vec\_ph026.vtk](https://discourse.paraview.org/uploads/short-url/4zTZBj8oKXK6l0vQsoQCCSZ7TLT.vtk) (598.8 KB)
[1998753LV\_3dflow\_vec\_ph027.vtk](https://discourse.paraview.org/uploads/short-url/dvCNJbmfSRBb1J6656TntR3H5H.vtk) (642.4 KB)
[1998753LV\_3dflow\_vec\_ph028.vtk](https://discourse.paraview.org/uploads/short-url/aNhnaDQeeGDP4HgPrT39mCVBZdV.vtk) (722.7 KB)
[1998753LV\_3dflow\_vec\_ph029.vtk](https://discourse.paraview.org/uploads/short-url/vtD0wlVxoZ5phTHCNG7kRlIuACa.vtk) (751.0 KB)
[1998753LV\_3dflow\_vec\_ph030.vtk](https://discourse.paraview.org/uploads/short-url/xz6AUmHJuxGNLhwSzw2aJWq1IIy.vtk) (723.5 KB)
[1998753LV\_LV\_Endo\_ph021.vtk](https://discourse.paraview.org/uploads/short-url/xCdRX543C10nQurZ7Go5zP23T3N.vtk) (167.1 KB)
[1998753LV\_LV\_Endo\_ph022.vtk](https://discourse.paraview.org/uploads/short-url/18LU2WS60yXCL0sUQ2XiIM19UN5.vtk) (167.1 KB)
[1998753LV\_LV\_Endo\_ph023.vtk](https://discourse.paraview.org/uploads/short-url/eDVa3VSdApGc0SIQhjAUekOszBM.vtk) (167.1 KB)
[1998753LV\_LV\_Endo\_ph024.vtk](https://discourse.paraview.org/uploads/short-url/n9EdkzmMAb0bmfFi729xn5LZSXK.vtk) (167.2 KB)
[1998753LV\_LV\_Endo\_ph025.vtk](https://discourse.paraview.org/uploads/short-url/sTw0WKei0J4E5f9jCkItumS7v9G.vtk) (167.2 KB)
[1998753LV\_LV\_Endo\_ph026.vtk](https://discourse.paraview.org/uploads/short-url/cmFKkwhUoSZbxkwNhMBuFG0ZUZU.vtk) (167.3 KB)
[1998753LV\_LV\_Endo\_ph027.vtk](https://discourse.paraview.org/uploads/short-url/zlNbdarPipluGu88NqmW3GFbZXD.vtk) (167.4 KB)
[1998753LV\_LV\_Endo\_ph028.vtk](https://discourse.paraview.org/uploads/short-url/eedKzOlUZWYM8nqaLUY918hXfSs.vtk) (167.6 KB)
[1998753LV\_LV\_Endo\_ph029.vtk](https://discourse.paraview.org/uploads/short-url/wLqH8cpZLbzmD5mDtRpkS9DJlb4.vtk) (167.6 KB)
[1998753LV\_LV\_Endo\_ph030.vtk](https://discourse.paraview.org/uploads/short-url/gPAt0ee0gwuLKyEsFW6vIofFpw9.vtk) (167.5 KB)
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### Author:  [@Francois\_Mazen](https://discourse.paraview.org/u/Francois_Mazen)
#### Post date: [November 17, 2023, 4:27pm UTC](https://discourse.paraview.org/t/smooth-of-flow-and-ventricles/13263/8 "2023-11-17T16:27:18Z")
Thanks for data sharing, I can now understand your problem.
It looks like your have 2 datasets, one with the surface contour and one with points with values. You should merge both before applying the smoothing to get the expected results. I can’t do the merge in ParaView because the two dataset does not have the same number of points. So you may have to do it in your software or manually, for example using VTK python scripting.