[Bando]

Hello

Consider the following situation: CFD analysis of a nozzle flow with double-precission Star-CCM+. The mass flow is calculated on a planesection at the throat.
All equations are discretized by second order methods. The mass flow itself is calculated in the way that both density and velocity at the throat section are mass flow averaged values, that i multiplicate by the known throat area.

So my question is...how can i estimate the uncertainty of the mass flow?

Thinking about it i would assume that the result is also of second order, double-precission as all variables are estimated to that order. But of course this is then depending on the unknown mesh error?

So...any hints?

Merken