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*DECK KINT03
SUBROUTINE KINT03(MAXKN,ISPLH,NBMIX,NEL,LL4,SGD,SIDE,ZZ,VOL,MAT,
1 KN,R,RH,RT,F2,F3)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Multiplication of a matrix by a vector in mesh-corner finite
* difference approximation (hexagonal geometry). Special version for
* Trivac.
*
*Copyright:
* Copyright (C) 2010 Ecole Polytechnique de Montreal
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version
*
*Author(s): A. Hebert
*
*Parameters: input
* ISPLH type of mesh-splitting: =1 for complete hexagons; .gt.1 for
* triangle mesh-splitting.
* NBMIX number of material mixtures.
* NEL total number of finite elements.
* LL4 order of system matrices.
* SGD cross section per material mixture.
* SIDE dide of an hexagon.
* ZZ height of each hexagon.
* VOL volume of each element.
* MAT mixture index assigned to each element.
* KN element-ordered unknown list.
* R unit matrix.
* RH unit matrix.
* RT unit matrix.
* F2 vector to multiply.
*
*Parameters: output
* F3 result of the multiplication.
*
*-----------------------------------------------------------------------
*
*----
* SUBROUTINE ARGUMENTS
*----
INTEGER MAXKN,ISPLH,NBMIX,NEL,LL4,MAT(NEL),KN(MAXKN)
REAL SGD(NBMIX),SIDE,ZZ(NEL),VOL(NEL),R(2,2),RH(6,6),RT(3,3),
1 F2(LL4),F3(LL4)
*----
* LOCAL VARIABLES
*----
INTEGER ILIEN(6,3),IJ17(14),IJ27(14),IJ16(12),IJ26(12),IJ1(14),
1 IJ2(14)
REAL RH2(7,7)
DOUBLE PRECISION RR,VOL1,RTHG(14,14)
DATA ILIEN/6*4,2,1,5,6,7,3,1,5,6,7,3,2/
DATA IJ16,IJ26 /1,2,3,4,5,6,1,2,3,4,5,6,6*1,6*2/
DATA IJ17,IJ27 /1,2,3,4,5,6,7,1,2,3,4,5,6,7,7*1,7*2/
*----
* COMPUTE THE HEXAGONAL MASS (RH2).
*----
IF(ISPLH.EQ.1) THEN
LC=6
DO 20 I=1,2*LC
IJ1(I)=IJ16(I)
IJ2(I)=IJ26(I)
20 CONTINUE
DO 41 I=1,LC
DO 40 J=1,LC
RH2(I,J)=RH(I,J)
40 CONTINUE
41 CONTINUE
ELSE
LC=7
DO 60 I=1,2*LC
IJ1(I)=IJ17(I)
IJ2(I)=IJ27(I)
60 CONTINUE
DO 76 I=1,LC
DO 75 J=1,LC
RH2(I,J)=0.0
75 CONTINUE
76 CONTINUE
DO 82 K=1,6
DO 81 I=1,3
NUMI=ILIEN(K,I)
DO 80 J=1,3
NUMJ=ILIEN(K,J)
RH2(NUMI,NUMJ)=RH2(NUMI,NUMJ)+RT(I,J)
80 CONTINUE
81 CONTINUE
82 CONTINUE
ENDIF
LL=2*LC
*----
* CALCULATION OF 3-D MASS AND STIFFNESS MATRICES FROM TENSORIAL PRODUCT
* OF 1-D AND 2-D MATRICES.
*----
DO 91 I=1,LL
I1=IJ1(I)
I2=IJ2(I)
DO 90 J=1,LL
J1=IJ1(J)
J2=IJ2(J)
RTHG(I,J)=RH2(I1,J1)*R(I2,J2)
90 CONTINUE
91 CONTINUE
*
NUM1=0
VOL1=SIDE*SIDE
DO 160 K=1,NEL
L=MAT(K)
IF(L.EQ.0) GO TO 160
IF(VOL(K).EQ.0.0) GO TO 150
DO 110 I=1,LL
INW1=KN(NUM1+I)
IF(INW1.EQ.0) GO TO 110
RR=RTHG(I,I)*VOL1*ZZ(K)
F3(INW1)=F3(INW1)+REAL(RR)*SGD(L)*F2(INW1)
110 CONTINUE
150 NUM1=NUM1+LL
160 CONTINUE
RETURN
END
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