Memory error in thermal simulation

Hello Inigo;

Can you please go through Flux supervisor and activate Dynamic memory and try again. In addition to that, is it possible to add the error message Flux returned ? You can may be attach the flile with extension .report

Regards

Hello, I have put the dynamic memory but I get the same error again. I dont understand how the simulation needs all that memory. What can be the reason of asking for so much memory? I put the report attached

I have managed to simulate the model reducing the quality of the mesh but there are not trustable results due to the bad quality of the mesh so I am looking for where I make the mistake. When I improve the mesh the simulation blocks and takes too much time.

Helli Inigo;

If you have a heavy model (lot of mesh nodes) and you don't have lot of memory you may have this issue. It is important to work on the mesh, to have finer mesh where needed only (airgaps, round shape area, and skin effect) so you can reduce the number of elements.

If in addition to that, you are considering the eddy current, the mesh in 3D will switch from 1st order to 2nd order automatically, it means that you will have more nodes, and then you need more numerical memory to solve.

Regards 

Hello

How can I do to not consider eddy currents? 

Hello;

The eddy current can be computed by defining a given region as solid conductor, the material of this region should have an electric resistivity.

Regards 

I dont think that is the problem because is a thermal simulation what I wanted to do. I have define two regions in the simulation one for the core what containds the iron losses and the material and another region for the coils with their losses and material. Should I divide the coil region into more regions or is okay defined like that? 

Another question is about the region face. I have defined the region face. Do you know where I can trustable find the convection h and radiation emissivity and absortion coefficient values of air? 

Hello Inigo;

If it is only a thermal application, yes you can decrease the mesh, however, if there are eddy current somewhere in you transformer, they are actually a hit source, so may be it is better to take them into account.

The losses soulde be given for the displayed part of the transformer, if you display half of the coil for instance, you should use halve of the coil losses.

For the boudary conditions, please have a look on the litterature, but the best way in this case, is to compute them thanks to a fluidic software like Altair AcuSolve (Introduction to AcuSolve (altair.com)).

Best regards 

Hello again Inigo;

To have more visibility on your questions in the forum, I encourage you to have one question for each subject. This one several questions were asked in the same thread, and actually they have no linke with memory management.

Regards