geomechanical model for C02 sequestration
Name Emilia_923
Group Janna
Matrix ID 2542
Num Rows 923,136
Num Cols 923,136
Nonzeros 40,373,538
Pattern Entries 41,005,206
Kind Structural Problem
Symmetric Yes
Date 2011
Author C. Janna, M. Ferronato
Editor T. Davis
Structural Rank 923,136
Structural Rank Full true
Num Dmperm Blocks 14,425
Strongly Connect Components 14,425
Num Explicit Zeros 631,668
Pattern Symmetry 100%
Numeric Symmetry 100%
Cholesky Candidate yes
Positive Definite yes
Type real
Download MATLAB Rutherford Boeing Matrix Market
Authors: Carlo Janna and Massimiliano Ferronato                 
Symmetric Positive Definite Matrix                              
# equations:  923136                                            
# non-zeroes: 41005206                                          
Problem description: Geomechanical problem                      
The matrix Emilia_923 is obtained from a structural problem     
discretizing a gas reservoir with tetrahedral Finite Elements.  
Due to the complex geometry of the geological formation it was  
not possible to obtain a computational grid characterized by    
regularly shaped elements.  The problem arises from a 3D        
discretization with three displacement unknowns associated to   
each node of the grid.  Some further information may be found in
the following papers:                                           
1) M. Ferronato, G. Gambolati, C. Janna, P. Teatini.            
"Geomechanical issues of anthropogenic CO2 sequestration in     
exploited gas fields", Energy Conversion and Management, 51, pp.
1918-1928, 2010.                                                
2) C. Janna, M. Ferronato. "Adaptive pattern research for block 
FSAI preconditionig". SIAM Journal on Scientific Computing, to