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-   -   Fluid flow will affect with different diffusivity? (http://www.cfd-online.com/Forums/fluent/35479-fluid-flow-will-affect-different-diffusivity.html)

tseo January 17, 2005 01:41

Fluid flow will affect with different diffusivity?
 
Hello, I solved advection-convection equation with Navier-stokes equation for several different UDS diffusivity using FLUENT. I expected that the wall shear stress should be same even if the values of the UDS diffusivity are different, but the results are not. The advection-convection equation with fluid flow is one-way coupling, so the diffusivity does not affect the fluid flow. In fluent I set the numnber of user-defined scalar as 1 and the flux function is mass flow rate. Did I miss something? If you know the reason physically, please let me know. Thank you in advance.


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