[Getdp] Heat of fusion

Christophe Geuzaine cag32 at case.edu
Sun Mar 5 01:44:57 CET 2006


David Felsenthal wrote:
> I am doing a non-linear thermal model. The heat of fusion is of course a
> large non-linearity. When doing a dynamic model I can do a crude
> approximation with a jump in the sensible heat over a small temperature
> range. It's kind of ugly though. To get reasonable results I need to 
> have the rho*c vary by about 300:1 over a range of 1 degree for a 
> problem whose range is 20 degrees.
> 
> I can make it work but I have convergence problems due (I think) to the 
> large variations in the value of rhoc over temperature.
> 
> Is there a better way of dealing with this issue, or should I just 
> accept long computation times?
> 

Do you simply use functional iteration (IterativeLoop), or do you use a 
Newton-Raphson iteration (IterativeLoop + JacNL)?


> Thanks again,
> David
> 
> 
> 
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-- 
Christophe Geuzaine
Assistant Professor, Case Western Reserve University, Mathematics
http://www.case.edu/artsci/math/geuzaine



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