water entry

Hi,

Yes, you can perform such simulation. :-)

Overset is not mandatory because the entire domain could follow the missile (like in Tutorial 3 Advanced), but it is much better to use it to preserve the free surface clean in the far field since the missile is rotating as well.

We have already done it a couple of times, but I am not aware of any public validation case from our customers. In the past, we just created a dummy case to illustrate the project for a torpedo ejection from a submarine. You can find it attached. In this project, the missile is leaving water to the air, so it is the opposite of what you are willing to do but the numerical setup is exactly the same.

Best regards,

Benoit2_domains_backup_24-06-2022_17h-40m-06s.zip

Thank you for the case setup :-)

can we do this in a single simulation, & for 3d case the setup is same ?

to_send.zip

Can you please check the case setup that i did for water entry at 0 deg & reset the setup in case it is wrong

Thank you.

Hi,

You setup is basically correct. Here your cylinder will rotate around the Reference point (0,0,0) and it is above the water line. So you are not going to simulate water entry here. It will just rotate in the water. Maybe you want to put the Tz solved to let it fall?

Best regards,

Benoit

Yes my cylinder should fall into the water at 40m/s for this my setup is correct right?

I see that all your DOF are fixed except Rz. How can it fall in the water? It will just rotate around (0,0,0). It can indeed hit the water thanks to the rotation but the object will continue to rotate forever.

Thank you for the info :-)

Thank you for the info :-)

You're welcome!

FYI, you are allowed to contact your local support. A dedicated team can also answer your questions, maybe even faster that what we can do here. :-)