COMSOL modeling of toroidal flow
I'm having lots of difficulty modeling toroidal flow in COMSOL. What I'm eventually getting at is a simulation of a semicircular canal, but am attacking the problem one step at a time.
The most fundamental model would just be cylindrical flow that wraps around in a circle, w/o no inlet/outlet i.e. a toroid.
Then I try to impart an initial radial velocity so that I can generate video watching the flow decline due to viscous forces at the wall. I've also tried to create a force field that varies w/ radius (toroid centered at (0,0) ).
Both methods error me to no end. Some solvers at least converge, but the results look whacky.
Any tips? Maybe a better way to model it would be a regular cylinder where the inlet's conditions were dtermined by the outlet's...?