[lt.quibbler]

Hello, dear foamers!

I've faced a very interesting problem using interFoam 2.1.x for the prediction of the resistance for Kriso Container Ship (KCS).

On relatively high Froude numbers ( 0.22 - 0.28 ) solver gives very good results compared to the experiment, but when I diminish the Froude number the results get worse.

For example, the coefficient for the total resistance on Froude number 0.1 is twice higher
than it should be. And it is so due to high values of pressure force, which is in this case 70-100 percent of the viscous force and oscillating.

When I tried to use pimpleFoam ( for 1-phase problem with symmetry plane) on the same Froude number for the same ship I got correct result. The error for resistance is about 10 percent.

Has anybody faced similar problems?
I just want to know if it is my fault or it is a well-known problem.

Thanks in advance!