Elmer Discussion Forum

Hi, Thanks everyone. I can change the current, but when I set the current to zero immediately, it's still flowing based on its previous value. When I set the boundary AV variables, the current flow is exactly what I want, but the magnetic field is felt only on the boundaries. I'll attach the current...

Hi Guys, Thanks for your reply. I still couldn't change current density with respect to time. I also tried with co-ordinate scaling 1. [1] Using Body Force: Body Force 1 Name="current density" Current Density 1 = Variable time Real MATC "1+sin(0.2*tx)" ! Current Density = 1e8 Cur...

For MGDynamics Solver under body force section, there are three current density components in x,y and z. Current Density 1, Current Density 2 and Current Density 3 For current in z direction for a straight rod Current Density 1 = 0 Current Density 2 = 0 Current Density 3 = 1e3 untitled.geo How to sp...

Hi Peter, I'm using Cent OS 7. I tried with real values too and I'm attaching a txt file with three test-cases for 1 A/mm^2 , 2 A/mm^2, 3 A/mm^2. As I said before Inductance is consistent for 1A, 2A but not 3A. test_case.txt ---------------------------------------------------------------------------...

Hi Guys,
Can anyone reply to the above post
viewtopic.php?f=3&t=5875&p=19415#p19415

Thanks.

Hi, I'm getting consistent inductance values for different current densities. However, this happens only if the current densities are powers of 2(J = 1, 2, 4, 8, etc.,). I'm not getting consistent inductance values when J= 1.1, 3, 6 etc., ( E= 0.5*L*(I*I) => L= (2*E)/(I*I) ) I'm attaching my sif fil...

Hi Guys, [1] I found this line under fem/tests/mgdyn_steady_wire2/ ( boundary stimulation) => AV = Real 5.542e-5 which is tuned for 1 Ampere. Boundary Condition 3 Name = "WireEnd" Target Boundaries(1) = 3 Coil End = Logical True AV {e} 1 = Real 0.0 AV {e} 2 = Real 0.0 ! Tuned to obtain cur...

Hi Guys, [1] I found this line under fem/tests/mgdyn_steady_wire2/ ( boundary stimulation) => AV = Real 5.542e-5 which is tuned for 1 Ampere. Boundary Condition 3 Name = "WireEnd" Target Boundaries(1) = 3 Coil End = Logical True AV {e} 1 = Real 0.0 AV {e} 2 = Real 0.0 ! Tuned to obtain cur...

What does 1,2,3 mean. How do i change these components if I want to input
current density as 2 nA/units*units .

Hi, I was able to calculate magnetic field energy and flux average SaveScalars: 1: res: eddy current power 0.000000000000E+000 SaveScalars: 2: res: magnetic field energy 3.981562920553E-031 SaveScalars: 3: res: magnetic flux average 4.566833176772E-021 SaveScalars: 4: res: magnetic flux density aver...