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Analyzing Convection vs. Diffusion

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Old   March 17, 2008, 15:03
Default Analyzing Convection vs. Diffusion
Emmanuel Resch
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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 diffusion-only model...

Thanks Emmanuel
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Old   March 17, 2008, 23:02
Default Re: Analyzing Convection vs. Diffusion
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Turn off the solution of momentum terms.
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Old   March 25, 2008, 15:35
Default Re: Analyzing Convection vs. Diffusion
Peter Specht
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strange idea?! Diffusion is one term inside the momentum equations of Navier-Stokes. No momentum: no convection, but also no diffusion.

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Old   March 27, 2008, 15:55
Default Re: Analyzing Convection vs. Diffusion
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Do you want to deactivate convection in all equations, or just one? There isn't a built-in 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 diffusion-only solutions for all equations, but that's very hard.
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