Dear Comsolians,
I was finally able to draw the problem in 3D in Comsol :), am also a beginner, lol.
The way I have modeled the coils is that they do not form a complete closed loop, thus I assigned "External current density" as a form of excitation. Does this work?
When I was reading the documentation about "Multi-turn Coils" it said that the coils must terminate on external boundary? What is an external boundary and do I need to model closed loops for the currents to get a solution, because currently they are just open to the air?
Then I just added the mesh node and solved the problem, but unfortunately after 4days the problem did not converge :(.
NB: PC properties - Intel Core(TM) i5-2400 CPU@3.10Ghz 3.10GHz
Memory: 4GB on a 64 bit Windows 7 OS with graphics card NVIDIA Quadro 600.
Initially I had tried to mesh the thin soft iron region which is 0.3556mm in the middle with a normal mesh and the poles which are 20mm in depth with also a normal mesh, and the surrounding air with a coarse/coarser mesh, and I had the same convergent issues.
I think the transition from a thickness of 0.3556mm to 20mm introduces meshing issues.
I also have a lot filleted edges and this makes these regions to have a high element density.
So how do I model the coils and mesh the problem?
Regards and please find attached the model
John Wanjiku
I was finally able to draw the problem in 3D in Comsol :), am also a beginner, lol.
The way I have modeled the coils is that they do not form a complete closed loop, thus I assigned "External current density" as a form of excitation. Does this work?
When I was reading the documentation about "Multi-turn Coils" it said that the coils must terminate on external boundary? What is an external boundary and do I need to model closed loops for the currents to get a solution, because currently they are just open to the air?
Then I just added the mesh node and solved the problem, but unfortunately after 4days the problem did not converge :(.
NB: PC properties - Intel Core(TM) i5-2400 CPU@3.10Ghz 3.10GHz
Memory: 4GB on a 64 bit Windows 7 OS with graphics card NVIDIA Quadro 600.
Initially I had tried to mesh the thin soft iron region which is 0.3556mm in the middle with a normal mesh and the poles which are 20mm in depth with also a normal mesh, and the surrounding air with a coarse/coarser mesh, and I had the same convergent issues.
I think the transition from a thickness of 0.3556mm to 20mm introduces meshing issues.
I also have a lot filleted edges and this makes these regions to have a high element density.
So how do I model the coils and mesh the problem?
Regards and please find attached the model
John Wanjiku