[chrissotirkos]

Hi,
i am experiencing difficulties solving my 2d ehl case using udfs. The codes based on the original thesis are the same (correct) but when i implement them in fluent, setting my dynamic zones for the dynamic mesh(the udf which is define_grid_motion is to simulate the elastic deformation of the top roller) and press calculation i get an error: fl process could not be started. the problem seems thst is in the first itteration at the first node of the top roller gives height equal to zero( which is not possible) for the lubricant film. its like the udf doesnt recognise the rollers coordinates or something. does anyone have an idea where the problem might be?