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If condition in coupled PDEs
Posted 6 juin 2012, 17:38 UTC−4 Version 4.2 2 Replies
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I am solving 9 coupled-Nonlinear PDEs. How can I add an "If condition" to dependent variables? (e.g constrained their value to change in a specific domain, 0 and 1)
(if x>1 then x=1 and if x<0 then x=0)
(if x>1 then x=1 and if x<0 then x=0)
2 Replies Last Post 12 juin 2012, 10:43 UTC−4
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Posted:
1 decade ago
Hi
check the doc on the if() operator, or use Bolean expressions
--
Good luck
Ivar
check the doc on the if() operator, or use Bolean expressions
--
Good luck
Ivar
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Posted:
1 decade ago
Thank you,
but I do not know where to put these IFs. I have 9 PDEs(g) and each of them has its own Gama and f. I add some if at the end of f part (force part) but it says Syntax error.
Should I add these IFs in Constraints part?
but I do not know where to put these IFs. I have 9 PDEs(g) and each of them has its own Gama and f. I add some if at the end of f part (force part) but it says Syntax error.
Should I add these IFs in Constraints part?