energy balance fipost

Ralf Kroeger

i have problems in calculating an integral energy balance of a simple 2D problem solved with fidap. simplified description:

---------------------------------------------------- edge1

|||||||||||||||||||||||||||||||||||||||||| solid ||||||||||||||||||||||||||||||||||||||||||||||||||

---------------------------------------------------- edge2

in ~ ~ ~ ~ ~ ~ ~ ~ ~ fluid ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ out

---------------------------------------------------- edge3

|||||||||||||||||||||||||||||||||||||||||| solid ||||||||||||||||||||||||||||||||||||||||||||||||||

---------------------------------------------------- edge4

fluid flows from left to right through plane 2D duct surrounded by solids

edge1: BCFLUX (heat,const)

edge4: adiabatic

turbulent, standard k-eps

the solution has converged to velc=1e-4

y+ values at edge2 are between 30 and 100 for momentum and energy

problem in fipost:

- the summation of the calculated temperature fluxes across "edge1" and "in" and "out" do not sum up to zero ?

- the flux(temperature) from edge2 into solid and fluid are not equal ?

does anyone know an explanation or did run into similar problems?