%-------------------------------------------------------------------------------
% SuiteSparse Matrix Collection, Tim Davis
% https://sparse.tamu.edu/Grueninger/windtunnel_evap3d
% name: Grueninger/windtunnel_evap3d
% [3D wind tunnel evaporation, Christoph Grueninger, Univ. Stuttgart]
% id: 2815
% date: 2017
% author: C. Gr\"uninger
% ed: T. Davis
% fields: name title A id date author ed kind notes b Zeros
% kind: computational fluid dynamics problem
%-------------------------------------------------------------------------------
% notes:
% Wind tunnel evaporation, Christoph Grueninger, Univ. Stuttgart           
%                                                                          
% Source: Christoph Grueninger, pr at grueninger.de                        
% Stuttgart Research Centre for Simulation Technology,                     
% Univ. of Stuttgart, Germany                                              
%                                                                          
% Matrix files: windtunnel-evaporation-(2|3)d-time4-newton1.mat            
% Right-hand sides: windtunnel-evaporation-(2|3)d-time4-newton1-rhs.mat    
%                                                                          
% == Background ==                                                         
% The matrix origins from a simulation of soil-water evaporation from a    
% water-filled sand box to air in a pipe. It is based on a coupled         
% Navier-Stokes/Darcy model. The Navier-Stokes model features one fluid    
% phase, the Darcy model two fluid phases. Each fluid phase may be composed
% of two components, in addition, non-isothermal processes are considered. 
% A cell-centered finite volume method (FVM) is combined with a marker and 
% cell (MAC) scheme. The coupled problem is compiled in one monolithic     
% system and solved using Newton's method. The given matrix occurs at the  
% 4th time-step in the 1st Newton step.                                    
%                                                                          
% == Publication and software==                                            
% The related model and the software is described in:                      
%   Christoph Gr\"uninger, Thomas Fetzer, Bernd Flemisch, Rainer Helmig:   
%   "Coupling DuMuX and DUNE-PDELab to investigate evaporation             
%   at the interface between Darcy and Navier-Stokes flow"                 
%   SimTech Technical Report 2017 - 1, 2017.                               
%   doi: 10.18419/opus-9360                                                
%   https://elib.uni-stuttgart.de/handle/11682/9377?mode=simple            
%                                                                          
% abstract:                                                                
% An implementation of a coupled Navier-Stokes/Darcy model based on        
% different Dune discretization modules is presented. The Darcy model is   
% taken from DuMuX, the Navier-Stokes model is implemented on top of       
% Dune-PDELab, and the coupling is done with help of Dune-MultiDomain      
% together with some project-specific auxiliary code. The Navier-Stokes    
% model features one fluid phase, the Darcy model two fluid phases. Each   
% fluid phase may be composed of two components, in addition,              
% non-isothermal processes are considered. The coupling between free and   
% porous-medium flow uses a sharp interface between both subdomains and    
% conserves mass, momentum, and energy by accounting for the corresponding 
% fluxes across the interface. A cell-centered finite volume method (FVM)  
% is combined with a marker and cell (MAC) scheme. It solves the coupled   
% problem in one monolithic system using a Newton method and a direct      
% linear solver.  Numerical results demonstrate the basic functioning and a
% lab-scale reference application.                                         
%                                                                          
% The software to reproduce the matrices is available as open source:      
% https://git.iws.uni-stuttgart.de/dumux-pub/Grueninger2017b               
%-------------------------------------------------------------------------------
