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-   -   mass-weighted avg VS. Area weighted avg. (http://www.cfd-online.com/Forums/fluent/32773-mass-weighted-avg-vs-area-weighted-avg.html)

co2 December 27, 2003 19:45

mass-weighted avg VS. Area weighted avg.
 
I have a simple incompressible turbulent flow in a 2D geometry. 1 inlet and 2 outlets.

After getting steady state converged solution, i found out that at a particular outlet i found out that area-weighted avg of velocity magnitude is = 0.836687 m/s

while mass-weighted avg = 0.8434061 m/s

why is the difference ? I was thinking for an incompressible flow the two should be pretty close.

ashu December 28, 2003 12:23

Re: mass-weighted avg VS. Area weighted avg.
 
Run the case a) with double precision b) more iterations and see if both match....


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