%-------------------------------------------------------------------------------
% UF Sparse Matrix Collection, Tim Davis
% http://www.cise.ufl.edu/research/sparse/matrices/Janna/Serena
% name: Janna/Serena
% [gas resevoir simulation for CO2 sequestration]
% id: 2541
% 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:   1,391,349                                           
% # non-zeroes: 64,531,701                                           
% Problem description: structural problem                            
%                                                                    
% The matrix Serena is obtained from a structural problem            
% discretizing a gas reservoir with tetrahedral Finite Elements.     
% The medium is strongly heterogeneous and characterized by a        
% complex geometry consisting of alternating sequences of thin       
% clay and sand layers.  Some further information may be found       
% in the paper:                                                      
%                                                                    
% 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.         
%-------------------------------------------------------------------------------
