Article ejection

Hello,

do you mean ejecting an object from the underwater vehicle that is moving forward, right?
If so, Fine Marine has already seen such projects. And you can indeed do it using overset method, in 2 steps:

First simulation: the underwater vehicle is moving forward and the object is inside the underwater vehicle following the motion of this vehicle (important to already define 2 bodies and place the 2nd body in an overlapping domain).

Second simulation: once the first is converged, we can eject the object by giving its own motion. the difficulty here will be the time step and the cell size in the confined region in between the object and the vehicle.

Best regards,

Benoit

Hello Thank you ,

is there any example case that did in finemarine similar to this case that can be shared ?

we did the overset mesh for the geometry but confused setting up the solver.

2D_Submarine_Torpedo_Overset.tar.gz

Here is a test case attached.

It consists of 2 simulations, the second one being the restart of the first one.

If you run the simulation, you will notice that the forces are quite oscillatory in the second simulation. This is expected since the object is in a confined environment and a lot of physics happens in this region where overlapping meshes are present.

Best regards