Problem with capillary force
 

Hi there,
So i am trying to simulate a rotating vessel with capillary force . The results are fine up to a certain point , but then the time step increases dramatically and when i check the results in paraFoam, the results seem really strange . I ran the same simulation without the capillary force and there was no problem .
Does anybody know what the problem is ? by the way capillary angel is 45 degrees