%-------------------------------------------------------------------------------
% UF Sparse Matrix Collection, Tim Davis
% http://www.cise.ufl.edu/research/sparse/matrices/Janna/Emilia_923
% name: Janna/Emilia_923
% [geomechanical model for C02 sequestration]
% id: 2542
% date: 2011
% author: C. Janna, M. Ferronato
% ed: T. Davis
% fields: name title A id date author ed kind Zeros notes
% kind: structural problem
%-------------------------------------------------------------------------------
% notes:
% 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  
% appear.                                                         
%-------------------------------------------------------------------------------
