[m5m5kh]

Hi foamers
I used groovyBC as boundary condition for wall of my case.but I have a problem.I modifed the heat flux on the wall but when temperature of the upper region of furnace is still 298K and the outer temperature is 298K too.so I expected to see zero gradient on the wall but there is a flux in paraFoam
it show me temprature at walls 0 while the lowest temperature is 298 in my boundary conditions.
I attached my case figure.
any help would be appreciated.

type groovyBc;
variables "h=1.12;k=0.065;Tinf=298;";
gradientExpression "h/k*(T-Tinf)";
fractionExprssion "0"; // 0 for neumann boundary condition
value uniform 298;

regards
Mohsen

[m5m5kh]

no idea!!!!!!!!!!

[gschaider]

Originally Posted by m5m5kh

Hi foamers
I used groovyBC as boundary condition for wall of my case.but I have a problem.I modifed the heat flux on the wall but when temperature of the upper region of furnace is still 298K and the outer temperature is 298K too.so I expected to see zero gradient on the wall but there is a flux in paraFoam
it show me temprature at walls 0 while the lowest temperature is 298 in my boundary conditions.
I attached my case figure.
any help would be appreciated.

type groovyBc;
variables "h=1.12;k=0.065;Tinf=298;";
gradientExpression "h/k*(T-Tinf)";
fractionExprssion "0"; // 0 for neumann boundary condition
value uniform 298;

regards
Mohsen

a) you have a typo in fractionExpression
b) Paraview doesn't know anything about groovyBC so the values it displays on the boundary might be wrong
c) for finding problems always use the Cell-values in Paraview. The point values are something it interpolates from the real values and might as well be a problem of Paraview

[gschaider]

Originally Posted by m5m5kh

no idea!!!!!!!!!!

I think it is a bit strange to expect an immediate answer

a) because this is a voluntary community service
b) it is a weekend

[m5m5kh]

Hi Bernhard
I'm sorry for ruining your weekend you are right
apologies

regards
Mohsen