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FS 183 6: Chemical kinetics problems
PSMOG atmospheric polution study -- 4th output time step

from set FACSIMILE, from the Harwell-Boeing Collection

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Straight chemical kinetics problem from atmospheric pollution studies. This is an example at the large end of the range of spatially homogeneous problems from straight chemical kinetics calculations.


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Matrix Statistics

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Size Type
183 x 183, 1069 entries real unsymmetric
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
1000 183 418 399 1272
Column Data Row Data
Average nonzeros per column : 5.5
Standard deviation : 12

indexnonzeros
longest1 105
shortest30 1

Average nonzeros per row : 5.5
Standard deviation : 8.7

indexnonzeros
longest2 71
shortest139 1

Bandwidths Profile Storage
lower182 upper152
average |i-j|63 std.dev.50
minmaxave.std.dev.
lower bandwidth0 181 77 57
upper bandwidth0 151 57 53

Nonsymmetric skyline storage 24431

Heaviest diagonals
offset from main0 -1 1 -94 -83 -95 -93 -8 -101 -98
nonzeros183 26 14 12 9 8 7 6 5 5
accumulated percent18.3020.9022.3023.5024.4025.2025.9026.5027.0027.50

Top 10 out of 299 nonvoid diagonals.
Conditioning
Frobenius norm1.2e+09 condition number (est.)1.5e+11
2-norm (est.)1.2e+09 diagonal dominanceno


Set Information

Set FACSIMILE
Source: Alan Curtis, Computer Science and Systems Division, AERE Harwell.
Discipline:Chemical kinetics
Accession:August 1983


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Last change in this page: Wed Sep 22 13:33:38 US/Eastern 2004 [Comments: ]