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Gaussian beam as a heat source

Posted 18.10.2013, 05:21 GMT-4 Plasma Physics, Heat Transfer & Phase Change, Materials Version 4.3b 0 Replies

Wiktor Bourée
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Hi,

I need some help! I am using the Heat Transfer in Solids model with Time-Dependent solution (3D simulation).

My heat source at the top of my device should me similar to a laser light of 50mW with a radius of the beam of 2.5mm. The laser beam has a gaussian shape. I set two functions gp1(x) and gp2(y) with a standard deviation of 2.5mm (same as the radius of my beam).

I defined the Boundary Heat Source as follows: 0.058[W/m^2]*gp1(x)*gp2(y)

- When going to Results>Derived Values> Surface Integration, I have a value of 0.04469 but it should be my inital power of 0.050W. Why? Is there another way to define the heat source I desribed above?

Thanks in advance for your help.
Wiktor
0 Replies Last Post 18.10.2013, 05:21 GMT-4
COMSOL Moderator

Hello Wiktor Bourée

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