Phase change from powder to liquid and back to solid

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Hi everyone, I am simulating Laser Powder Bed Fusion (LPBF) process and have modelled powder layer as a continuous-scale. I have coupled heat transfer in solid and fluids with laminar flow. I want to know how I can model the phase change for powder as it will first melt to liquid and then will solidify into solid. I want to know how to do this in COMSOL. Using phase change would convert back it to the same material. So, how to make it one way such that it first converts the powder into liquid and later liquid is converted to solid. More information: Properties like density, thermal conductivity and specific heat capacity of powder layer properties is defined as an average of air and solid based on volume fraction.


1 Reply Last Post 11.07.2025, 19:23 MESZ
Edgar J. Kaiser Certified Consultant

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Posted: 2 days ago 11.07.2025, 19:23 MESZ

You might consider to do it in two steps. First melt the powder and use this result as start for the second solidification step.

Cheers Edgar

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
You might consider to do it in two steps. First melt the powder and use this result as start for the second solidification step. Cheers Edgar

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