# How to set a physical field in grid nodes and cells
**URL:** https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933
**Category:** ParaView Support
**Created:** [November 30, 2020, 11:09am UTC](https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933 "2020-11-30T11:09:43Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@E.Gaubesh](https://discourse.paraview.org/u/E.Gaubesh)
#### Post date: [November 30, 2020, 11:09am UTC](https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933/1 "2020-11-30T11:09:43Z")
Hello,
I just started learning ParaView so need your help.
I needed to create a 2D grid model and set the physical fields (temperature distribution, density, etc.) in the nodes and cells of this grid.
I created a grid (Sources -\> Fast Uniform Grid).
I think that I should use ‘Add Field Arrays’ filter to add temperature values for each cell and node but I don’t understand how to create data array file with this values.
I will be grateful for any help!
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### Author:  [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [November 30, 2020, 11:11am UTC](https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933/2 "2020-11-30T11:11:29Z")
Nope, this is not the way to go.
How do you want to specify the values, from files ? Which format ?
ParaView is not a meshing tools, so this may not be an easy task.
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### Author:  [@\_Marco](https://discourse.paraview.org/u/_Marco)
#### Post date: [November 30, 2020, 3:35pm UTC](https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933/3 "2020-11-30T15:35:55Z")
Hi @E.Gaubesh,
If you are using Python, and feel comfortable working in that environment, I could send you some basic python script that fills user-defined arrays (any size) and converts them into netcdf: easily readable in PV.
I have done something similar for a project I am working on.
Ciao
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### Author:  [@E.Gaubesh](https://discourse.paraview.org/u/E.Gaubesh)
#### Post date: [November 30, 2020, 6:47pm UTC](https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933/4 "2020-11-30T18:47:45Z")
Hi,
Yes, I’m using Python.
Thank you for answer.
It would be nice if you could send them.
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### Author:  [@E.Gaubesh](https://discourse.paraview.org/u/E.Gaubesh)
#### Post date: [November 30, 2020, 6:50pm UTC](https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933/5 "2020-11-30T18:50:46Z")
Oh, I think I understand what you mean.
Shall I use \*.vtk file to run in PV? or something else?
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### Author:  [@\_Marco](https://discourse.paraview.org/u/_Marco)
#### Post date: [November 30, 2020, 7:59pm UTC](https://discourse.paraview.org/t/how-to-set-a-physical-field-in-grid-nodes-and-cells/5933/6 "2020-11-30T19:59:02Z")
Sent your per private message. Good luck.