[mo_na]

Hi all,

I am simulating a pitching floater in a wave flume with ihFoam and a moving mesh. To validate my simulation I want to compare my results with pressure measurements, that were taken in experiments.
I got the positions of the pressure sensors on the body. The problem is that the body will move during the simulation, so these locations won't stay the same in reference to the global coordinate system..
Does anyone have an idea how to get the pressure (in several locations) on the moving body either using the probe or the sample function?

Cheers,
Mona

[jmdf]

Hi,

I don't have that many experience with sampling, however I have a suggestion.
If you create a cellZone, faceSet, or something like that, using topoSet and then probe the zone you created instead of a point, could it work?

I suppose that when you create a cellZone it "follows" when the mesh moves. Not sure if this works but let me know, despite it does or not.

[mo_na]

Hi João,

thanks for your answer! I will definitely try that and let you know if it works!

[mo_na]

Hey everyone,

if you are using a dynamic mesh, this is actually quite easy.
You just need to use

fixedLocations     false;

and the probe will move with the mesh, so it will stay in the same place in relation to the body.

I now have this in my controlDict and it works fine:

probes
{
// Where to load it from
functionObjectLibs ( "libsampling.so" );

type        probes;

// Name of the directory for probe data
name        probes;

// Fields to be probed
fields (
        p
       );

probeLocations
(
(0.490739 0 -0.29552)
(0.418913 0 -0.30492)
(0.29715 0 -0.198471)
(0.272609 0 -0.136329)
(0.42495 0 -0.31246)
(0.489783 0 -0.297302)
(0.335867 0 -0.23989)
);

fixedLocations false;
}