d4bde033a4
'mex_ip_simple' now returning an indirection array/data array pair (akin to G.cells.facePos and G.cells.faces(:,1)) to account for wells.
88 lines
2.9 KiB
Matlab
88 lines
2.9 KiB
Matlab
function varargout = mex_compute_press_flux(varargin)
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%Derive pressure and flux from hybrid system using compiled C code.
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%
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% SYNOPSIS:
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% [v, p] = mex_compute_press_flux(BI, lam, connPos, conns, F, L)
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%
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% PARAMETERS:
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% BI - Inner product values. Typically computed using function
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% 'mex_ip_simple'.
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%
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% lam - Interface pressure values. One scalar value for each face in
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% the discretised reservoir model.
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%
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% connPos - Indirection map of size [G.cells.num,1] into 'conns' table
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% (i.e., the connections or DOFs). Specifically, the DOFs
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% connected to cell 'i' are found in the submatrix
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%
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% conns(connPos(i) : connPos(i + 1) - 1)
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%
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% conns - A (connPos(end)-1)-by-1 array of cell connections
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% (local-to-global DOF mapping in FEM parlance).
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%
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% F - Second-to-last return value from 'mex_schur_comp_symm'.
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%
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% L - Last return value from 'mex_schur_comp_symm'.
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%
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% NOTE:
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% The (connPos,conns) array pair is expected to be the output of function
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% 'mex_ip_simple'.
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%
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% RETURNS:
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% v - A SUM(nconn)-by-1 array of half-contact fluxes, ordered by cells.
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%
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% p - A NUMEL(nconn)-by-1 array of cell pressure values.
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%
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% NOTE:
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% This function is the MEX'ed equivalent to the post-processing of
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% function 'schurComplementSymm'. Note furthermore that this function
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% can only be used in conjunction with function 'mex_schur_comp_symm'.
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%
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% EXAMPLE:
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% G = computeGeometry(processGRDECL(makeModel3([100, 60, 15])));
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% K = logNormLayers(G.cartDims, [10, 300, 40, 0.1, 100]);
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% rock.perm = bsxfun(@times, [1, 100, 0.1], K(:));
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% rock.perm = convertFrom(rock.perm(G.cells.indexMap, :), ...
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% milli*darcy);
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%
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% [BI, connPos, conns] = mex_ip_simple(G, rock);
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%
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% nconn = diff(connPos);
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%
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% [i, j] = blockDiagIndex(nconn, nconn);
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% [S, r, F, L] = mex_schur_comp_symm(BI, connPos, conns);
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%
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% SS = sparse(double(conns(i)), double(conns(j)), S);
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% R = accumarray(conn, r);
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%
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% lam = SS \ R;
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%
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% t0 = tic;
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% [v, p] = mex_compute_press_flux(BI, lam, connPos, conns, F, L);
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% toc(t0)
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%
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% SEE ALSO:
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% mex_ip_simple, mex_schur_comp_symm.
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%{
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#COPYRIGHT#
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%}
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% $Date$
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% $Revision$
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buildmex CFLAGS="\$CFLAGS -Wall -Wextra -ansi -pedantic ...
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-Wformat-nonliteral -Wcast-align -Wpointer-arith ...
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-Wbad-function-cast -Wmissing-prototypes -Wstrict-prototypes ...
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-Wmissing-declarations -Winline -Wundef -Wnested-externs ...
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-Wcast-qual -Wshadow -Wconversion -Wwrite-strings ...
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-Wno-conversion -Wchar-subscripts -Wredundant-decls" ...
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...
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-O -largeArrayDims -DCOMPILING_FOR_MATLAB=1 ...
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mex_compute_press_flux.c hybsys.c ...
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-lmwlapack -lmwblas
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% Call MEX'ed edition.
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[varargout{1:nargout}] = mex_compute_press_flux(varargin{:});
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end
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