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C |
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C /==========================================================\ |
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C | CG2D.h | |
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C | o Two-dimensional conjugate gradient solver header. | |
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C |==========================================================| |
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C | The common blocks set up here are used in the elliptic | |
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C | equation inversion. They are also used as the interface | |
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C | to the rest of the model. To set the source term for the | |
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C | solver set the appropriate array below. To read the | |
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C | solution read from the appropriate array below. | |
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C \==========================================================/ |
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C-- COMMON /CG2D_R/ DEL**2 Laplacian operators |
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C aW2d - East-west operator. |
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C aS2d - North-south operator. |
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C pW - East-west off-diagonal term of preconditioner. |
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C pS - North-south off-diagonal term of preconditioner. |
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C pC - Main diagonal term of preconditioner. |
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COMMON /CG2D_R/ |
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& aW2d, |
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& aS2d, |
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& pW, pS, pC |
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Real aW2d (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real aS2d (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real pW (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real pS (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real pC (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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C-- COMMON /CG2D_WK_R/ Work array common block |
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C cg2d_q - Intermediate matrix-vector product term |
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C cg2d_r - " |
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C cg2d_s - " |
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C cg2d_x Solution vector |
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C cg2d_Ax Laplace operator on the solution (used to check |
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C the result). |
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C cg2d_b Right-hand side vector |
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COMMON /CG2D_WK_R/ |
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& cg2d_q, cg2d_r, cg2d_s, cg2d_x, cg2d_Ax, cg2d_b |
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Real cg2d_q(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real cg2d_r(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real cg2d_s(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real cg2d_x (1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real cg2d_Ax(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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Real cg2d_b(1-OLx:sNx+OLx,1-OLy:sNy+OLy) |
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