Discussion Forum

its important..anyone? i need help

Hi

well chose MF, stationary , draw your magnet (centred at 0,0,0), surround it by a sphere of radius >3-4 times your magnet, add a 1/10 radius shell on your sphere (in v4 you have the layer) call it a Infinite Element layer, add a "Ampers's Law 2" and select the magnet. Set the Magnetic field tab to Magnetisation and type M =1E6[A/m] (or whatever you need) for one direction. Do not forget to add the material air: sigma = 1, epsilon_r=1, mu_r=1 and the magnet sigma =1, epsilon_r =1, mu_r =1.1 (or whatever material properties that fit)

Then solve, you may test with or without a Inf Elements. To integrate the flux you might either Data set cut surface and integrate over it, or you add a dummy body(ies) of "air to define your relevant surfaces, and then you might pick the boundaries and integrate over them. By the way use spherical Infinite elements! this with a sphere is not the default

But this yo should have managed by your own if you had done some of the simple examples in the Model library, no ?

--
Good luck
Ivar

Thanks, I was trying really hard to understand what you wrote but I can't get it workign my model. I didn't even understand what you wrote, sorry.

But I have model made in inventor on which i want to carry out the simulation on.

The CAD model is attach. Can you please help me step by step how to perform the test?

What I want to do is simple, 400 degree celicus to be on top of the piston head. The bars sticking out in the bottom of piston are the magnets. I want to see the the change in magnetic field, flux density and strength of magnetic field about 10 centimeter away from the central axis of the pistion. I have to calculate induced voltage.

I need to test the simulation with different permanent magnets.

Can someone please help me

see the pic for exactly what i'm trying to do... please help me on it.

I want to integrate the flux over the circular solid around the piston

You can see the save files below [attachment]

I'm doing the tutorials. Ill come back if I have any problem so don't bother replyign just yet

Okay,, I just to find out can I calculate the current through induction by telling comsol that the permanent magnetic is moving up and down vertical motion at lets say 20 times in a second and traveling total distance of lets say X meters in one vertical movement. So it basically travels 2 times X to complte one cycle.

actually i need help making it.. please help me