Elmer Discussion Forum

Hello Elmer community, I'm trying to solve a transient dynamic coupled with an Acoustic analisy. Is it possibles? Is the Helmholtz solver a transient one? My workflow is more or less like this: 1) perform a Dynamic transient analisys 2) follow an Acoustic analisys taken as input the boundary displac...

Hello Elmer community, I'm trying to solve a transient dynamic coupled with an Acoustic analisy. Is it possibles? Is the Helmholtz solver a transient one? My workflow is more or less like this: 1) perform a Dynamic transient analisys 2) follow an Acoustic analisys taken as input the boundary displac...

Hello everyone, I am simulating an induction welding process. The magnetostatic analisys runs well as you can see from the attached picture. Now I change to the "WhitneyAVHarmonicSolver" with the following setting: ... omissis ... Solver 4 Equation = "WhitneyHarmonicSolver" Proce...

yes many thanks, now it works: Body Force 4 Current Density 1 = Variable Coordinate 2, Time; Real MATC "-tx(0)*ia*atan((tx(1)-2)*(pi/2)/taui)/(pi/2)" Current Density 2 = Variable Coordinate 1, Time; Real MATC "tx(0)*ia*atan((tx(1)-2)*(pi/2)/taui)/(pi/2)" Current Density 3 = 0 End...

Hi Elmer community, I would like to impose a current density as variable of time in a coil. I would like to do this to in order to simulate the exponential increasing current in the coil as its time constant. This time constant is taui=11.2[ms]=0.0112[s] Is it correct to assign this body load to the...

hello everyone, I'm trying to evaluate the eddy current in the stator of a micro generator. Please have a look to the attached picture. The question is: how is possible to simulate the coil? At the moment the ring of the coil is only representative footprint. Actually the coil is a 470 copper wire r...

Thank you very much Peter. I used H-B curve and now saturation is resolved. Just another question, in order to work well, in the material definition I have to set also the keyword "relative permeability". The magnetic permeability is not given from the first 2 points of the H-B curve? here...

Hi all, do you know if it is possible to define a non linear relative permeability material in MGDynamics WhitneyAVSolver? I would like to simulate an iron core saturation via the permeability as function of magnetic flux density B[T]. es. : Material 3 Name = FeDC05 Density = 7860 Electric Conductiv...

In the attached image you could find a step computation at 0.001089 [s] correspond to a magnet position of 40deg. Shortly after the computation crash in divergence. At the moment I increased electrical conductivity for air and non conducting magnet with the hope to help convergence (before I had air...

hello everybody, after a few succefully trials in steady state magnetic analisys with Whitney element I switched to transient analisys. I'm trying to simulate a two pole cylindrical magnet that rotate about the Z axis with a rotatio speed of about 6120 rpm. In my input file I define these variables:...