Elmer Discussion Forum

You can also try to control Time Step when maxTemp is close to the threshold value, viewtopic.php?f=3&t=1681. May be Adaptive Timestepping option could be used.

Hi, may be these ideas could be useful: viewtopic.php?t=2216, with 'boundary max' operator and 'Heat Flux = Variable T_max'.
Regards.

Ok, so there are not surfaces on every side? Using Physical Surfaces approach only the defined surfaces are shown in GUI. And so available to set BC. I see it very comfortable for complex geometries. When I load into ElmerGUI cathode is surface 1 and 2, but anode is surface 3 Strange, according to ...

Hi,
To see volume mesh just click View-> Volume mesh in Elmer.

Hi,
by switching off the radiation I have found that radiation is not included in boundary sum on heater in my original case.

Hi,

I have used heat source (body force) instead of the fixed temperature on heater and the difference decried to about 1100 W.

What is the formula implemented in Elmer for calculating the heat exchange between a fluid and solid?

Here is my mesh (not very 'fluidic'):

Hi All, I have similar problems. The case is the air flow around heater (500degC). The walls of channel are modelled by solid bodies. c.png The convective flux is calculated by 'convective flux' operator, the fluxes on the solid faces by 'boundary sum' on 'temperature load'. The flux on internal fac...

Hi, I am modelig the bracket attached to the wall by one screw. It works as cantiliver. When the horizontal arm of the bracket is loaded, the upper part loses contact with the wall, what is taken into account by the 'Displacement Lower Limit' option set on the entire surface adjacent to the wall. Bo...

I have found exactly the same case:
viewtopic.php?t=3972
No ,,Gradp Discretization = Logical True'' is needed in my file.

May I ask the Administrator to delete this discussion?

Kevin, thank you for your interest.
I have doubt if the result is phisicaly reasonable. I would expect rather a more or less parabolic distrubution of the velocity in the diameter of pipe.