Hello Fortunate Ogene,  the  (Error: Divergence detected in AMG solver: k ) error with VOF that you have encountered in your simulation is a  common error in Fluent Platform.  It has many reasons; so my recommendation is to check all the items related to your simulation for examples grid system, initial & boundary condition, UDF (if it is used) and other related parameters.  Hope it will be helpful for you. Additionally, I would like to recommend you to visit CFD online where you may find much more advice related to your problem. Anyway, Good luck. 

Usually this error happens when you give incorrect inputs. Please check your inputs thoroughly. There may be some missing or inconsistency in the inputs. e.g. scaling or dimension specifications etc.

Dear Fortunate Ogene,

Is it a discrete phase simulation coupled with turbulence (SKE)? Is the model working correctly with SKE (k-epsilon) turned off?

I may be of some help here...however, I need more details about your simulation.

Best regards,

Shaswat Saincher

Hi Fortunate Ogene,

employ finer meshes to solve this problem