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Post Laser Ablation - Cooling
Posted 17 juin 2015, 06:51 UTC−4 Heat Transfer & Phase Change, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.0 0 Replies
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I'm new to COMSOL, I'm currently working on a summer project trying to produce a 2D model of laser ablation. So far I have just looked into the heat transfer module and have kept all parameters as simple as possible ( 2 separate layers of metal of slightly different density) and using a boundary heat source with a square time function to act as the laser pulse.
I have used the heat transfer with phase change in order to mimic the ablation, in that when the temperature reaches T the density and conductivity change from the metal quantities to corresponding air quantities.
This all worked fine and has produced satisfactory results. However, after the laser pulse has ended I want to be able to observe the temperature profile while its cooling to see how the heat dissipates into the surrounding areas, but because the density change is temperature dependent once the metal begins to cool the 'air' in the ablation site turns back into 'metal'.
Is there any way to ensure that once the metal has been ablated and the density in that area changes to 'air' it remains that way, so while the ablated area is cooling the density and conduction properties remain as air and not switch back to metal once the boundary T is reached.
Thank you
Hello Alice Garrett
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