Post-processing through non-usual planes

Perconoux

Hi,

I have two questions about post-processing tools included in DualSPHysics :

I want to capture the positions of somes fixed and moving (not fluid) particles in a plane which is not aligned with (x,y), (y,z) or (x,z) planes. The "-onlypos:xmin:ymin:zmin:xmax:ymax:zmax" option of the "PartVTK" code seems not sufficient to perform this operation....is it possible to rotate the frame x,y,z in a specified direction after the processing ? is there existing solution ?

In the same way, I want to capture the heigh of the free surface in a plane which is not aligned with (x,y), (y,z) or (x,z) planes. The "-points " or "-pointspos " options of the "MeasureTool" code seem not sufficient to perform this operation... is there existing solution ?


Thank you in advance for your help.

Best Regards,
Perconoux

Alex

One solution is after creating your objects and fluid is rotating all of them.
And you will define gravity in the direction you want.
Hence your -onlypos:xmin:ymin:zmin:xmax:ymax:zmax will be in the positions you want while the whole system is aligned with gravity direction

Regards

Alex

Perconoux

Alex thank you for your comment.
However this solution is only valid before the processing, isn't it ?
Is there a solution feasible after the calculus ?

Best Regards,
Perconoux

Alex

Why is ony valid before the processing??
The modified gravity is valid for the whole simulation!!!!!!!!!!

Perconoux

Sorry my english is not very good: by "valid" I just wanted to ask if this solution (rotating objects and fluid with "drawrotate angx= angy= angz= /" or "rotate x= y= z= ang=/" in the _def.xml file) must be applied before the calculus or an existing similar operation can be applied during the post-processing ? In my case the gravity direction is not a problem because it is along z axis whereas i want to rotate my frame around z-axis. Is there a pre-defined function in post-processing codes for "frame changing" or it must be done manually by treating - for example - output data in .cvs file with a personal python code ?

Alex

I do not understand what you mean.

The solution I gave you is easy. You will simulate a rotated case (everything was rotated) with a modified gravity. In that way you can use -onlypos:xmin:ymin:zmin:xmax:ymax:zmax as it is.

If you do not like this option, you can just keep your system as it is, define -onlypos:xmin:ymin:zmin:xmax:ymax:zmax to include your are or volume and then treat the output data selecting only particles with the positions you desire

Regards

Alex