Analyzing Convection vs. Diffusion
Does anyone know of a practical way to "turn off" the convective flux and just have diffusive transport? Effectively I'd like to run a diffusiononly model...
Thanks Emmanuel 
Re: Analyzing Convection vs. Diffusion
Turn off the solution of momentum terms.

Re: Analyzing Convection vs. Diffusion
strange idea?! Diffusion is one term inside the momentum equations of NavierStokes. No momentum: no convection, but also no diffusion.
Peter 
Re: Analyzing Convection vs. Diffusion
Do you want to deactivate convection in all equations, or just one? There isn't a builtin general way to do it for all equations, but for scalars you can choose the "diffusion" transport method. If you were ambitious you could perhaps build on this to get diffusiononly solutions for all equations, but that's very hard.

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