# Discussion Forum

## Help me please! how to draw the magnetic field lines in 3D, as

 Topics: 4.3a, Results and visualization
RSS feed   |   Turn on email notifications   |   8 Replies   Last post: May 19, 2014 1:33am UTC

Dima Ilchen

December 2, 2012 11:54pm UTC

Help me please! how to draw the magnetic field lines in 3D, as

Hi all!
I need to add the magnetic field lines (and possibly add metal bars between the head and emitter) to the model 2190 Absorbed Radiation (SAR) in the Human Brain.
PS Since I'm a beginner, then I ask (if possible) to provide input data for example.

Sergei Yushanov
Certified Consultant
AltaSim Technologies, LLC

December 3, 2012 2:58pm UTC in response to Dima Ilchen

Re: Help me please! how to draw the magnetic field lines in 3D, as

Dima,

Use the following steps to create magnetic stream lines:

1. Results>3D Plot Group
2. 3D Plot Group 1>Streamline
3. In the expression to plot, define Magnetic flux density vector {Bx,By,Bz}, or Magnetic field vector {Hx,Hy,Hz}
4. In the Streamline Positioning section, adjust streamline parameters to get nice plot for magnetic field lines

Good luck,

Sergei Yushanov

Dima Ilchen

December 3, 2012 11:09pm UTC in response to Sergei Yushanov

Re: Help me please! how to draw the magnetic field lines in 3D, as

Thank you!
But I've done it before. And the result was not granted me.
Maybe I'm doing something wrong?

Ralf Tschiesche

December 4, 2012 7:36am UTC in response to Dima Ilchen

Re: Help me please! how to draw the magnetic field lines in 3D, as

Hi!

Something like this? You can play a lot with 3D plots ;-)

Ralf

Ivar Kjelberg

December 4, 2012 7:47am UTC in response to Dima Ilchen

Re: Help me please! how to draw the magnetic field lines in 3D, as

Hi
You must define a region (boundary) from where COMSOL should seed the generate of the streamlines, typically some place close to your source. Or you select the Uniform density streamline

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Good luck
Ivar

Dima Ilchen

December 4, 2012 10:11pm UTC in response to Ralf Tschiesche

Re: Help me please! how to draw the magnetic field lines in 3D, as

Hi!

Something like this? You can play a lot with 3D plots ;-)

Ralf

Hi!
Yes I want that! But somehow nothing is drawn. =(
In the graphics tab - empty!

Ivar Kjelberg

December 5, 2012 6:33am UTC in response to Dima Ilchen

Re: Help me please! how to draw the magnetic field lines in 3D, as

Hi

check the sub nodes of your plot, something is not set-up correctly, or you are not pointing to the right data set, there can be many things.

Have you gone through the doc to understand what the different tab and entries do ? usually the most important are coming first (on the top)

--
Good luck
Ivar

Ralf Tschiesche

December 5, 2012 10:25am UTC in response to Dima Ilchen

Re: Help me please! how to draw the magnetic field lines in 3D, as

Hi!

I have cleared the solution to get a small file...you only have to re-run the simulation.

Ralf

Shan Huang

May 19, 2014 1:33am UTC in response to Dima Ilchen

Re: Help me please! how to draw the magnetic field lines in 3D, as

Hi!

Something like this? You can play a lot with 3D plots ;-)

Ralf

Hi!
Yes I want that! But somehow nothing is drawn. =(
In the graphics tab - empty!

hi, this happened to me too, how did you fix it?

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