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Modelling of Fluid flow during laser welding! Help Needed!

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Old   April 9, 2009, 13:21
Exclamation Modelling of Fluid flow during laser welding! Help Needed!
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Nadim Sanjakdar
Join Date: Apr 2009
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Hello "Scientists"!

I'm trying to simulate the fluid flow in the molten pool during laser welding using Fluent (i am only a beginner) and i need some help with the following problems:

- Laser Heat source: does any one have a UDF that describes Gaussian laser heat surface source? or if not, can anyone help me with that?
- if we want to model Pulse Laser heat source, what do we do?
- Do we use the steady or unsteady model?
- do we include the energy and the flow in the calculations directly or we do the energy first as an initial condition?
- Using the VOF model requires the presence of 2 identified phases but when we are using the melting/solidification model we then only have the liquid-solid metal material defined according to the temperature, therefore how can we use the VOF model with this problem? and if so, how can we simulate the surface deformation?

I'd appreciate it if anyone answers some of my questions!~

Thank you all!


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