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Heat flux as a piecewise function
Posted Jun 5, 2012, 2:41 a.m. EDT 2 Replies
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Hello,
i´m currently having a problem on declaring a temperature as a piecewise function. Ì´m using Heat Transfer in Fluids modul, where I added a Temperature to my lower boundary, that is constant in time. What I need is a heat source, that is for instance for 0<t<20 sec is 100 W and after that is 0. Is something like that possible nad how?
Thx in advance!
i´m currently having a problem on declaring a temperature as a piecewise function. Ì´m using Heat Transfer in Fluids modul, where I added a Temperature to my lower boundary, that is constant in time. What I need is a heat source, that is for instance for 0<t<20 sec is 100 W and after that is 0. Is something like that possible nad how?
Thx in advance!
2 Replies Last Post Jun 5, 2012, 7:29 a.m. EDT
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Posted:
1 decade ago
Hi
define an analytical or a pievevise function in the "Definition" section then use it in the BC field with a call to time "t[1/s]", perhaps premultiplied by an amplitudes with correct units
for example
Q0*rect1(t[1/s])
with Q0 = 5[W/m^2] or whatever defined in a parameter, or from another study as a variable
and rect1() an operator you define in the Definition function nodes
--
Good luck
Ivar
define an analytical or a pievevise function in the "Definition" section then use it in the BC field with a call to time "t[1/s]", perhaps premultiplied by an amplitudes with correct units
for example
Q0*rect1(t[1/s])
with Q0 = 5[W/m^2] or whatever defined in a parameter, or from another study as a variable
and rect1() an operator you define in the Definition function nodes
--
Good luck
Ivar
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Posted:
1 decade ago
Thanx a lot! :)