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June 16, 2013, 23:00 |
sparse martix in unstructured grid
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#1 |
Senior Member
Mehdi Baba Mehdi
Join Date: Jan 2011
Posts: 158
Rep Power: 15 |
hi friends;
Coefficient matrix in NS equations (Turbulence model equations and ...) are extremely large, and if it is defined as A(E,E) (E: number of cells), computer can not compile this huge data. one way is using the methods were introduced in dealing with sparse matrix [1] (CDS,CRS, ... ). now I want to know whether or not specific methods have been introduced which are suitable for CFD particularly in unstructured Grid? thank you so much in advance. [1] Templates for the Solution of Linear Systems: Building Blocks for Iterative Methods", Ch. 4, available in: http://www.siam.org/books |
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June 17, 2013, 22:23 |
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#2 |
Senior Member
Chris DeGroot
Join Date: Nov 2011
Location: Canada
Posts: 414
Rep Power: 17 |
Yes, sparse matrix representations are absolutely mandatory for CFD problems. I have developed in a number of CFD codes and certainly we store our matrices in a sparse format, e.g. Yale sparse matrix format.
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June 18, 2013, 02:37 |
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#3 | |
Senior Member
Mehdi Baba Mehdi
Join Date: Jan 2011
Posts: 158
Rep Power: 15 |
Quote:
Thank you so much. do you know which method is more suitable for CFD, particularly in unstructured grid which does not have a regular data structure or is not a banded matrix? |
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June 18, 2013, 10:55 |
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#4 | |
Senior Member
Chris DeGroot
Join Date: Nov 2011
Location: Canada
Posts: 414
Rep Power: 17 |
Quote:
I typically use the Yale format, but I am sure others are suitable. |
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June 18, 2013, 22:13 |
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#5 |
Senior Member
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any sparse matrix storage form is suitable for the cfd computation.
for example, coordiniate form, csr form, csc form, and the other. you can download the sparskit from http://www-users.cs.umn.edu/~saad/software/ to find transformation between different matrix form. |
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