Matrix: Botonakis/thermomech_dK

Description: FEM problem, temperature and deformation of a steel cylinder

Botonakis/thermomech_dK graph
(undirected graph drawing)

Botonakis/thermomech_dK

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  • Matrix group: Botonakis
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  • download as a MATLAB mat-file, file size: 24 MB. Use UFget(2260) or UFget('Botonakis/thermomech_dK') in MATLAB.
  • download in Matrix Market format, file size: 36 MB.
  • download in Rutherford/Boeing format, file size: 32 MB.

    Matrix properties
    number of rows204,316
    number of columns204,316
    nonzeros2,846,228
    structural full rank?yes
    structural rank204,316
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetry 67%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorI. Botonakis
    editorT. Davis
    date2009
    kindthermal problem
    2D/3D problem?yes

    Notes:

    TC and TK are for temperature, dM and dK for deformation

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD14,644,661
    Cholesky flop count3.8e+09
    nnz(L+U), no partial pivoting, with AMD29,085,006
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD25,867,207
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD49,149,338

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.