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Heat Source Expanding with time!
Posted 3 feb 2013, 09:25 GMT-5 Heat Transfer & Phase Change, Geometry Version 4.3a 1 Reply
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I have a model for EDM process in which I need to put an heat source which would be expanding with time. But it shows error if I give time dependent position of a point under boundary conditions. Laser example shows a moving heat source but how can I build a heat source expanding with time???
Thanks
Thanks
1 Reply Last Post 3 feb 2013, 11:46 GMT-5
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Posted:
1 decade ago
Hi
if you have a transient solver you can define a function (Model - Definitions - Functions) that depends on the time. If the area is constant you need only to multiply the Heat source flux / power density value by the time, appropriately, but if your surface heating is also expanding with time, you might use a Gaussin function over the coordiates that depends on time.
Note COMSOL has a particular way to normlaise it's default Gaussian function, it's in the help but today, you must still do a search over the help to find the correcct formula
--
Good luck
Ivar
if you have a transient solver you can define a function (Model - Definitions - Functions) that depends on the time. If the area is constant you need only to multiply the Heat source flux / power density value by the time, appropriately, but if your surface heating is also expanding with time, you might use a Gaussin function over the coordiates that depends on time.
Note COMSOL has a particular way to normlaise it's default Gaussian function, it's in the help but today, you must still do a search over the help to find the correcct formula
--
Good luck
Ivar