# Difference of two temperature fields between two openFOAM projects

**URL:** <https://discourse.paraview.org/t/difference-of-two-temperature-fields-between-two-openfoam-projects/17816>\
**Category:** ParaView Support\
**Created:** [November 15, 2026, 11:31am UTC](https://discourse.paraview.org/t/difference-of-two-temperature-fields-between-two-openfoam-projects/17816 "2026-11-15T11:31:57Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mushungus](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/m/7ea924/32.png) [@mushungus](https://discourse.paraview.org/u/mushungus)\
**Post date:** [November 15, 2026, 11:31am UTC](https://discourse.paraview.org/t/difference-of-two-temperature-fields-between-two-openfoam-projects/17816/1 "2026-11-15T11:31:57Z")

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Hi there,  
I am new to the functionality of the paraview program. I have two projects ng12 and ng6 with the same geometry but the number of elements in the grid is different. In this case, how can we obtain data on the difference between the two temperature fields of these projects to determine the error?  
I uploaded two projects to disk.

> **[Google Drive: Sign-in](https://accounts.google.com/v3/signin/identifier?continue=https:%2F%2Fdrive.google.com%2Fdrive%2Ffolders%2F1Wnqunp_T-K5_lU4exNFQDgB25Fu2ztDa?usp%3Ddrive_link&followup=https:%2F%2Fdrive.google.com%2Fdrive%2Ffolders%2F1Wnqunp_T-K5_lU4exNFQDgB25Fu2ztDa?usp%3Ddrive_link&osid=1&passive=1209600&service=wise&flowName=GlifWebSignIn&flowEntry=ServiceLogin&dsh=S-1995212237:1794742315776975)**
>
> Access Google Drive with a Google account (for personal use) or Google Workspace account (for business use).

 ![image](https://discourse.paraview.org/uploads/default/original/3X/0/d/0d2ae0009e1687591031bb910da394cf667fc230.jpeg)

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**Author:** ![Kenneth\_Moreland](https://discourse.paraview.org/user_avatar/discourse.paraview.org/kenneth_moreland/32/15033_2.png) [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)\
**Post date:** [November 15, 2026, 3:48pm UTC](https://discourse.paraview.org/t/difference-of-two-temperature-fields-between-two-openfoam-projects/17816/2 "2026-11-15T15:48:39Z")

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I couldn’t download your data because I don’t have permissions. The usual way to compare data on two volumes occupying the same space but with different grids is to first run **Resample With Dataset** to first interpolate the fields from one grid to the other. You can then use the **Append Attributes** to combine the fields of two (or more) pipeline objects into the same dataset. Finally, you can use the **Calculator** filter to compute difference metrics between the two fields.

You can find more information about this process in other posts such as this one: [Superposition effect - #17 by Kenneth\_Moreland](https://discourse.paraview.org/t/superposition-effect/10950/17)

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**Author:** ![mushungus](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/m/7ea924/32.png) [@mushungus](https://discourse.paraview.org/u/mushungus)\
**Post date:** [November 15, 2026, 4:12pm UTC](https://discourse.paraview.org/t/difference-of-two-temperature-fields-between-two-openfoam-projects/17816/3 "2026-11-15T16:12:50Z")

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I set the file permissions.  
Could you please try again?

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**Author:** ![Kenneth\_Moreland](https://discourse.paraview.org/user_avatar/discourse.paraview.org/kenneth_moreland/32/15033_2.png) [@Kenneth\_Moreland](https://discourse.paraview.org/u/Kenneth_Moreland)\
**Post date:** [November 15, 2026, 5:07pm UTC](https://discourse.paraview.org/t/difference-of-two-temperature-fields-between-two-openfoam-projects/17816/4 "2026-11-15T17:07:16Z")

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The link might be wrong. I still sends me to a login page and then a request for permissions.

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**Author:** ![mushungus](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/m/7ea924/32.png) [@mushungus](https://discourse.paraview.org/u/mushungus)\
**Post date:** [November 15, 2026, 5:29pm UTC](https://discourse.paraview.org/t/difference-of-two-temperature-fields-between-two-openfoam-projects/17816/5 "2026-11-15T17:29:36Z")

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\<https:// drive. google. com/drive/folders/1Wnqunp\_T-K5\_lU4exNFQDgB25Fu2ztDa\>

Maybe this will work?