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How to set the direction of an incident wave?

Posted 8 oct. 2010, 04:38 UTC−4 4 Replies

Xue Li
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Hello,

I am a beginner in Comsol .I don't know how to set the direction of an incident wave and I am looking forward eagerly to someone who can help me.

In comsol 4.0a ,the default direction of the incident wave is expressed by "-temw.nx,-temw.ny".What do these symbols mean?If I want to re-set the direction, what format should I follow ?

Thank you very much!
4 Replies Last Post 3 nov. 2010, 02:43 UTC−4
Irfan
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Posted: 1 decade ago 8 oct. 2010, 22:26 UTC−4
If you are using scattering boundary, then direction is represented by k. such as under menu for k, z=-1 means wave is propagating towards -ve Z direction and set x,y=0. you can have Ex=1 or Ey=1 for plane wave. I think this setting is a good start for you, and you can play along.

Irfan
If you are using scattering boundary, then direction is represented by k. such as under menu for k, z=-1 means wave is propagating towards -ve Z direction and set x,y=0. you can have Ex=1 or Ey=1 for plane wave. I think this setting is a good start for you, and you can play along. Irfan
Xue Li
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Posted: 1 decade ago 31 oct. 2010, 03:19 UTC−4


Thank you very much for your help!
Thank you very much for your help!
Avineet Ponde
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Posted: 1 decade ago 1 nov. 2010, 15:45 UTC−4
Hello,

Can you please let me know how to set the beam at an angle to say x axis?

Your help would be appreciated.

Thank you
Hello, Can you please let me know how to set the beam at an angle to say x axis? Your help would be appreciated. Thank you
liuyun lee
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Posted: 1 decade ago 3 nov. 2010, 02:43 UTC−4

Hello,

Can you please let me know how to set the beam at an angle to say x axis?

Your help would be appreciated.

Thank you
[/QUOTE
first, you can define a constant theta,in boudary condition,if in a 2D model,there are two blank positions in wave direction k, you write down k0_...*cos(theta) and k0-...*cos(theta),theta is the angle of incident wave, "..." is standed for diffirencent application mode.
[QUOTE] Hello, Can you please let me know how to set the beam at an angle to say x axis? Your help would be appreciated. Thank you [/QUOTE first, you can define a constant theta,in boudary condition,if in a 2D model,there are two blank positions in wave direction k, you write down k0_...*cos(theta) and k0-...*cos(theta),theta is the angle of incident wave, "..." is standed for diffirencent application mode.

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