Momentum Source Convergence
Hi. I'm trying to simulate air flow through a fan by adding a general momentum source to a subdomain, however I am having convergence problems.
Convergence of vmomentum eventualy causes divergence of u,w momentum equations (at about maxvmom= 1e02). (using upwind, timestep auto. but reducing t results in same) Seems the worst residuals are right at the boundaries of the subdomain where the source is added (1e02). But Grid refinement seems not to help. Overall velcity field looks realistic (vmax approx 5m/s). Anyone have any experience / problems / ideas with adding momentum sources?  axial component: 500 * parabolic_distribution r component: 0 theta comp: 0 Momentum source component: 1e+05 NOT redistributed in Rhie Chow < seems to do nothing NOT incl. Coeff. in Rhie Chow < seems to do nothing Rotation Axis: GlobalY  
Re: Momentum Source Convergence
You should not be using the upwing scheme. Are you sure your source size calculations are accurate? Manual contains a good section on dealing with convergence issues "Advice on flow moddeling".

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