Apply heat souce on moving gas/liquid interface?

cfdkc · April 23, 2014, 13:50

Hi all,

I am using Ansys CFX to simulate laser weld molten pool flow. The laser heat needs to be applied on the gas/liquid metal interface, which is moving as liquid metal evaporates. My question is how to track the interface and apply the heat source there? Can the interface location be accessed as an internal variable, similar to gas.vf and liquid.vf?

Thanks for your help.

cfdkc

ghorrocks · April 24, 2014, 03:51

Some ideas:

You could model the laser with a radiation model. Then the heating would occur at the correct place when you have set the absorbance, reflectivity and everything else.

You could assume the surface occurs when the volume fraction is between 0.1 and 0.9 (for example). This approach only works if your interface is well defined.

April 23, 2014, 13:50	Apply heat souce on moving gas/liquid interface?	#1
cfdkc New Member Join Date: Apr 2014 Posts: 1 Rep Power: 0	Hi all, I am using Ansys CFX to simulate laser weld molten pool flow. The laser heat needs to be applied on the gas/liquid metal interface, which is moving as liquid metal evaporates. My question is how to track the interface and apply the heat source there? Can the interface location be accessed as an internal variable, similar to gas.vf and liquid.vf? Thanks for your help. cfdkc

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April 24, 2014, 03:51		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,712 Rep Power: 143	Some ideas: You could model the laser with a radiation model. Then the heating would occur at the correct place when you have set the absorbance, reflectivity and everything else. You could assume the surface occurs when the volume fraction is between 0.1 and 0.9 (for example). This approach only works if your interface is well defined.