Hi, every one,

I am simulating the slug flow in vertical tube by using VOF. The tube is 1m long and diameter of 10mm.I use the axisymmetry option in Fluent and make a 13*1000 grid. But in my simulating, I must set a very small time step, say 5E-5s, and for 1s simulating will cost 1 day. Does anyone have suggestions? And do you parralel cpmputer will do help with my case(because the grid number is not large)? Thanks in advance!! B. Zhao

hi...

plz try it...

pressure : presto coupling : piso

hoping you could increase the time step... have a nice day

Jay

Hi

Is there any reason why you should set such a small time step? you may want to use the second order upwind/quick method for the momentum solver.

aravind

Hi, Avavind,

Thanks for your answer. If I set a not-so-small time step, I will not get a reasonable result. I use the second upwind differential scheme for momentum solver.

Zhao