CAEdevice wrote:The limit I have is that I am not able to extract the pressure differential and to write it in a log (as it happens with the areo forces).
Sorry about not having taken up on your earlier query on this. To extract the pressure differential, please do the following:
- Start ParaView;
- Open the openFoam file;
- Only select the boundary condition (in the part option) that you want to calculate the surface integral of pressure on;
- Apply a calculator filter;
- Set a new field "Pressure = 1.2 * p" (the pressure calculated and output by openFoam is normalised by the density);
- Apply the Surface Integral Filter;
- the surface integral of pressure is reported under Pressure.
Change the selected boundary condition to extract the value at the other surface.
CAEdevice wrote:Another issues for a beginner is the manage the double start (preliminary run). What about starting directly from the second stage?
You can, but it just takes longer to establish, hence more iterations...