Preconditioner for non linear mass matrix
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I have to solve an ODE system of the form:
M(y,t)*dydt = F(y,t)
The problem is, that it is very ill conditioned. I used the incomplete cholesky technique as a preconditioner for the system
M*dydt = F(y,t)
which worked very well! Now the problem is that I want to use the same technique for the space and time dependent matrix
M(y,t)
This takes very long to calculate this in advance because I need the inverse and power of the Matrix C:
C = RR^T
Is there a possibility to speed up this preconditioning or is there a faster approach?
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回答 (1 件)
felix svoboda
2019 年 7 月 15 日
Hey did you ever managed to solve this issue?
I am facing this very problem... it is taking ages :(
1 件のコメント
John D'Errico
2019 年 7 月 15 日
Please don't answer a question with just another question, or a "me too" response. Learn to use comments.
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