Could anyone let me know when to use a mass-weighted average. I'm calculating average value of scalar dissipation rate. Is it suitable?
We use mass and area weighted depending on what's needed.
For an outlet temperature (flow boundary) I'd use mass weighted. On a wall surface for temperature I'd use area weighted.
Can't we use in a reverse way?
Abu Bakar khan
Please explain, I'm not sure what you mean.
I mean to say that is it ok if I am using an area-weighted average for flow boundary and the mass-weighted average for wall surface
You can use those. However, how will area average account for a small region that's going very quickly when checking the mean temperature or species passing though a plane?
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