[simulate1]

hi
how can i compute average temperature in whole 3d domain?
and
whats the conception of mass weighted average over deafault interior in report surface integral?

[LuckyTran]

In the GUI go to reports=> volume integrals
select temperature as your field variable
choose your cell zone(s)

On report type choose the one that fits your definition of "average" temperature. Many averages are available except for the simple number average.

The mass-weighted average surface integral is actually a "mass-flow" or "mass-flux" weighted average. This type of averaging is very important if you want to make analogies to certain physical quantities since fluxes of energy, enthalpy, momentum are transported by the velocity, and certain quantities also depend on the mass. e.g. the bulk temperature is a mass-flow weighted average temperature, average ennthalpy flux or average total pressure & total temperature should all be computed from mass-flow weighted averages.