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Pulsed Heat Source

Posted Nov 22, 2012, 7:23 a.m. EST Version 4.2a 1 Reply

Paul Morin
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Hello,

As someone new to COMSOL, I am need of help on how to implement a pulsed heat source. I currently have a circle on a micro beam acting as a heat source that corresponds to an infrared laser. I now wish to pulse that laser with a square-wave function. How do you take the function and apply it to the circular area as a heat source. Any help is appreciated!

Thanks,

Paul
1 Reply Last Post Nov 22, 2012, 3:49 p.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago Nov 22, 2012, 3:49 p.m. EST
Hi

if your circular zone is a boundary (surface in 3D) then add a surface flux, define a time dependent function (use the Definition rect function with smooth transitions, else the sover will have dicciculties. Then set your time stepping t strict or intermediate and give a few time steps during the pulse change phase so the solveer follows the pulse shape

--
Good luck
Ivar
Hi if your circular zone is a boundary (surface in 3D) then add a surface flux, define a time dependent function (use the Definition rect function with smooth transitions, else the sover will have dicciculties. Then set your time stepping t strict or intermediate and give a few time steps during the pulse change phase so the solveer follows the pulse shape -- Good luck Ivar

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