• UF Sparse Matrix Collection
  • Matrix group: Averous
  • Click here for a description of the Averous group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Averous/epb3
  • Description: Plate-fin heat exchanger (large case) (DAE) David.Averous@ensigct.fr
  • download as a MATLAB mat-file, file size: 833 KB. Use UFget(290) or UFget('Averous/epb3') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Averous/epb3

    Averous/epb3 graph

    Matrix properties
    number of rows84,617
    number of columns84,617
    nonzeros463,625
    structural full rank?yes
    structural rank84,617
    # of blocks from dmperm1
    # strongly connected comp.1
    entries not in dmperm blocks0
    explicit zero entries0
    nonzero pattern symmetry 67%
    numeric value symmetry 3%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorD. Averous
    editorT. Davis
    date1998
    kindthermal problem
    2D/3D problem?yes

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))2,555,409 2,462,840
    Cholesky flop count3.4e+08 2.3e+08
    nnz(L+U), no partial pivoting5,026,201 4,841,063
    nnz(V) for QR, upper bound nnz(L) for LU4,591,899 3,153,281
    nnz(R) for QR, upper bound nnz(U) for LU9,402,754 7,456,201

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.