vof model_finegrid_urgent plz help

garima chaudhary

Dear all,

I am facing a great issue regarding simulating a rotating cylinder using vof method. I did for 6 different grid sizes for a domain of size 8cm*2cm. THe different no of cells taken are 1600,2560,6400,10000,25600,40000 for this domain size . I observe that the last two finest grids give me very different velocity profiles as compared to other grids, also i think its not realistic , i am not able to make out wats the issue bcoz as we go on refining the grid size the solution shud converge which is not happening.

i AM TAKING an axisymmetric swirl case . my geometry consistes of a axisymmetric cylinder 8cm*2cm. the height of the cylinder is 8 cm and the radius is 2 cm.the cylinder is filled with water till a ht of 3 cm , the rest is air. at the top of the cylinder i hav taken pressure outlet boundary condition and the wall is rotaing at speed of 50 rad/sec.

i will be highly obliged if u kindly help me in resolving this issue , i need it urgently.

regards garima