Discussion Forum

What may help: go to "Community" on the COMSOL website. In "Community" go to "model exchange." In the search window (magnifying glass) type laser. Close to the top of the listing is a simulation of the laser as a moving heat source. Also what I find interesting and very valuable is a 3D guassian Maxwell representation for a laser. The gaussian distribution seems to be a reasonable way to represent Maxwell's equations for a laser. If you have the rf module, importing this model should not be a problem.

If you have only thermal and mechanical, there should be no problem in importing the moving heating source.

Your email shows version 4.2a. You should be able to get version 4.3.

I am struggling to do laser sintering myself. Perhaps a discussion would be useful. I am somewhat new to COMSOL myself.

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Arthur Rupel
arthur.rupel@us.army.mil

Hey Arthur,

Your advice was immensely useful :). I managed to set up a simple simulation based on the "laser heating - self guided tutorial".

What exactly are you struggling with? Maybe I can ask some of my colleagues which are more proficient with the program for help.

Cheers,

Boyan

This is a tough one:
1. em generating heat and structural deformations on an indiviudal and adjacent steel powder grains about 6 um.
There may be various phenomena involved: for example joule heating, the skin effect, the dominance in ferromagnetic grains to heating by the magnetic rather than electric fields., etc. Also what are the ideal frequencies for the laser for heating for these grains? My guess is to evaluate the natural frequencies of the grains and test these with similiar frequencies of the laser. If there are better methods, I would be interested.

2. The change of state of the grain during the heating, melting, and cooling processes. This again is a hard one.

Again I do not expect much since much of this is new.

Thanks,
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Arthur Rupel

Hi Arthur,

But does this "Laser Heating" package work on 4.1?
I tried, but it says ' ...created in a later version of comsol...'

thank you.
sankeerth.

Hello,

I am Meera Kunden and I am beginner of COMSOL user. I would like develop a heat transfer to a stationary double layered material using moving laser. The laser is moving in meander shape. Can any one please suggest me how to set the path for the laser in meander shape.

With regards;
Meera