[ITSY]

Greetings all.
I'm a new user in OPENFOAM and my apologies at the beginning for asking a question if it is too simple.

I'm interested in calculating a full-scale vessel's frictional and wave resistance.
Based on the tutorials I have found, I can calculate the total resistance force by adding the wall share stress function to controlDict. However, I'm interested in waves and frictional resistance separately.

1- May I know if such a separation/calculation is possible in OpenFoam or not?
If so, Can I find some clue or a tutorial for this?

Many thanks for any help in advance.

[JNSN]

Hi,


you can write out the forces acting on your ship with the forces function object. See an example in the system/controlDict of DTCHull tutorial. The function object writes out friction and pressure forces.

How to obtain the wave resistance from the pressure force then depends on the method you prefer, e.g. by an additional doubleBody simulation etc...


Best,
Jan

[ITSY]

Originally Posted by JNSN

Hi,


you can write out the forces acting on your ship with the forces function object. See an example in the system/controlDict of DTCHull tutorial. The function object writes out friction and pressure forces.

How to obtain the wave resistance from the pressure force then depends on the method you prefer, e.g. by an additional doubleBody simulation etc...


Best,
Jan

Thanks a lot for your reply.
I have used the DTCHull tutorial with some minor changes to be able to run it ie adding pcorrFinal to "fvSolution". As you said, it works and I can get the viscous and pressure force (Thanks for the hint).

Regarding the conversion of the pressure to wave resistance, I didn't get it exactly. Do you mind explaining a little bit more?

Thanks
ITSY