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timediscrete initial conditions.
Posted 17 set 2012, 18:13 GMT-4 Version 4.2 1 Reply
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Hello,
I used to work with comsol few months ago. I nomore work with because I have nomore accessto the machine, but at the end I was dealing with the timediscrete solver and faced a problem. If it happens I work again with, it would be nice if I knew how to deal with such a problem:
If two coupled equations are discretized and each one involve u(t), u(t-1), and u(t-2), then the solver might not be able to run because there are too much unknowns for the system, because we only specify u at t=0 by applying for example: a source on boundaries.
How one can specify u(0) AND u(1), in order to solve the first steps of the solver??? (basically I would like to set them to 0 everywhere)
Thanks
I used to work with comsol few months ago. I nomore work with because I have nomore accessto the machine, but at the end I was dealing with the timediscrete solver and faced a problem. If it happens I work again with, it would be nice if I knew how to deal with such a problem:
If two coupled equations are discretized and each one involve u(t), u(t-1), and u(t-2), then the solver might not be able to run because there are too much unknowns for the system, because we only specify u at t=0 by applying for example: a source on boundaries.
How one can specify u(0) AND u(1), in order to solve the first steps of the solver??? (basically I would like to set them to 0 everywhere)
Thanks
1 Reply Last Post 18 set 2012, 10:23 GMT-4
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Posted:
1 decade ago
hello, up,
my question is quite simple indeed, is there any possibility to specify the fields u(0) and u(1) by myself?
my question is quite simple indeed, is there any possibility to specify the fields u(0) and u(1) by myself?