[shiro44]

Hi everybody. I was wondering how can i manually calculate the value of the height of the first cell near a wall (y) , not using the equation that relates y and y+. Is there a direct method using Paraview?

[Tobermory]

Yes; here's one way. Start by writing the cell coordinates out as a field:

postProcess -func writeCellCentres -time 0

Now start up paraFoam and you will see that there are 4 new fields that are available to load: C (vector, cell centre coord), Cx (scalar, cell centre x-coord), Cy & Cz. If you load these in, then you can get paraview to label your vertices with the coordinates, as follows:

1. Get an appropriate view of your mesh
2. Turn on Camera Parallel Projection (on the LHS properties pane)
3. Activate Select Points On (press d key, or click one of the little icons at the top of the window - the one with the points and the arrow)
4. select a point on the boundary
5. turn on Add Selection (the little icon with a + sign and an arrow, again at the top of the window), then select another point (d, or the same icon as before) - on the other side of the same cell. If you can't find the icons, then hold ctrl while you select the nect point and it will do the same thing - add to the selection.
6. Over on the right side of the Paraview window, you should have a Selection Display Indicator pane. If it's not visible, toggle it on with the menu bar View drop down. In that pane, click on the "point labels" drop down and select either C, or perhaps Cz.

and bingo! Your points are labelled with their coords. It's pretty useful for basic level checking of the mesh.