[solved] ExtractBlock filter in Paraview not showing many items

[Will2]

I'm new to using the CFD workbench and have been learning how to use it with all the time I have at home.

I've gotten a few simulations to work at this point.

My main question is I tried to follow this video on how to compute aerodynamic forces with paraview using this tutorial: https://www.youtube.com/watch?v=J944HOj_4b0 When I add the ExtractBlock filter to filter out the wing surface it is not listed under Block Indices. Only internalMesh is listed. I suspect I have to add this data manually in the mesh case but I'm not sure.

A secondary minor question is how to bring back the residuals chart after opening a saved document.

Any help would be appreciated and I hope everyone is doing as well as they can at this point.

Will

Forgot this:
OS: Ubuntu 18.04.4 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.
Build type: Release
Branch: unknown
Hash: c2818d9159385d23b182dc7167af2d4bacbee94c
Python version: 3.6.9
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/Canada (en_CA)

[thschrader]

When computing forces with paraview I activate the face of interest (the wing)
and use the filters as shown in the picture (in this order).

Filter “GenerateSurfaceNormals”: activate the “Compute Cell Normals” option
Filter “Calculator”: in Attribute mode switch to cell data
Filter "integrate variables": after apply, activate cell results in spreadsheet.

In the calculator-filter you must multiply the pressure result with the fluid-density to get the correct force.
Openfoam calculates a normalized pressure, see definition of dimensions in p-file after case writing.

Bring back the residuals:
I save the residual-plot as a picture-file.

paraview_filters.JPG (67.85 KiB) Viewed 1042 times

[Will2]

Thanks! that was super useful and worked like a charm!

You're the best!