@ Tero:
it works with Low-Reynolds k-epsilon. But when i investigate my real problem with a boundary heat source my results are a little bit strange.
@ all:
To be sure I can use the turbulent model I increased the length of my plate to 1m, thus I get a Reynolds number of 3.2491 * 10^6. For that length and an area of 1 m^2 I need a power of 4349 W to keep my plate at +4°C (inlet @ -30°C and 45m/s).
When I simulate it the end of my plate is at a temperature of ~ +240°C and the front is at ~ -20°C. So my question is, is it possible to validate my calculations. Because it is a logical result that the end of the plate is the warmest spot and the end the hottest. Maybe it is juast a meshing problem!?!?
One problem that I have is I can not use the COMSOL implementet material for AIR. When i try to use it I get different error massages or the error did not convergate. Currently I use constant (mean) values for air in the region of -30°C to +10°C.
I atteched the file, maybe someone would be so kind and have a look at it. I'm trying to verify my results scince almost one week :-(.
thx
it works with Low-Reynolds k-epsilon. But when i investigate my real problem with a boundary heat source my results are a little bit strange.
@ all:
To be sure I can use the turbulent model I increased the length of my plate to 1m, thus I get a Reynolds number of 3.2491 * 10^6. For that length and an area of 1 m^2 I need a power of 4349 W to keep my plate at +4°C (inlet @ -30°C and 45m/s).
When I simulate it the end of my plate is at a temperature of ~ +240°C and the front is at ~ -20°C. So my question is, is it possible to validate my calculations. Because it is a logical result that the end of the plate is the warmest spot and the end the hottest. Maybe it is juast a meshing problem!?!?
One problem that I have is I can not use the COMSOL implementet material for AIR. When i try to use it I get different error massages or the error did not convergate. Currently I use constant (mean) values for air in the region of -30°C to +10°C.
I atteched the file, maybe someone would be so kind and have a look at it. I'm trying to verify my results scince almost one week :-(.
thx
