I've been trying to find information in some of the pdf's but I just can't figure this out and searching the forum a bit.

I started wondering about how I was able to export mass and volume from a 2d simulation? I did not specify any depth? This is my case:

Basically a box of fluid inside a box, and then a moving box in the middle.

Secondly my method for calculating the force acting on the moving box (in the middle) during movement is by using F = ma on the particles of the moving box, since I have the assumption that these particles have to get a acceleration to overcome the forces of water and do the prescribed sinusdioal motion. Any comments or better approach on this?

Kind regards, Ahmed

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## Comments

Volume = Area x Depth

So since I know the volume of the moving particles by exporting via PartVtk and that I know the area of the moving square, 0.01 m^2, I could calculate the depth. I ended up with a depth of 44 metres..

I am still confused how DualSPHysics can provide a volume in 2d (ie which depth it uses naturally, is it the 1 my I see in Freecad GUI?) but wanted to share some more of my thoughts if they were to help others in the future.