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*DECK DREJ02
SUBROUTINE DREJ02(ITYPE,IELEM,NREG,NUN,MAXKN,MAXQF,MAT,KN,QFR,
1 IQFR,VOL,FUNKNO,OUT,GAMMA)
*
*-----------------------------------------------------------------------
*
*Purpose:
* One-speed net surfacic current calculation in 3D mixed-dual finite
* element approximation.
*
*Copyright:
* Copyright (C) 2018 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
* ITYPE type of geometry: =5/7 (Cartesian); =8/9 (hexagonal).
* IELEM degree of the Lagrangian finite elements: =1 (linear);
* =2 (parabolic); =3 (cubic); =4 (quartic).
* NREG number of elements.
* NUN dimension of array FUNKNO.
* MAXKN dimension of array KN.
* MAXQF dimension of array QFR.
* MAT mixture index per region.
* KN element-ordered unknown list.
* QFR element-ordered surfaces.
* IQFR element-ordered physical albedo indices.
* VOL volume of regions.
* FUNKNO neutron fluxes.
*
*Parameters: output
* OUT net surfacic current.
* GAMMA gamma function.
*
*-----------------------------------------------------------------------
*
*----
* SUBROUTINE ARGUMENTS
*----
INTEGER ITYPE,IELEM,NREG,NUN,MAXKN,MAXQF,MAT(NREG),KN(MAXKN),
1 IQFR(MAXQF)
REAL QFR(MAXQF),VOL(NREG),FUNKNO(NUN),OUT,GAMMA(NUN)
*
IF(IELEM.LT.0) CALL XABORT('DREJ02: TYPE OF DISCRETIZATION NOT I'
1 //'MPLEMENTED.')
GAMMA(:NUN)=0.0
OUT=0.0
NUM1=0
NUM2=0
IF((ITYPE.NE.5).OR.(ITYPE.NE.7)) THEN
DO 20 K=1,NREG
IF(MAT(K).EQ.0) GO TO 20
IF(VOL(K).EQ.0.0) GO TO 10
IF(NUM2+4.GT.MAXQF) call XABORT('overflow')
IALB=IQFR(NUM2+1)
IF((IALB.NE.0).AND.(QFR(NUM2+1).GT.0.0)) THEN
IND1=KN(NUM1+2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug1')
GAMMA(IND1)=-QFR(NUM2+1)
OUT=OUT-FUNKNO(IND1)*QFR(NUM2+1)
ENDIF
IALB=IQFR(NUM2+2)
IF((IALB.NE.0).AND.(QFR(NUM2+2).GT.0.0)) THEN
IND1=KN(NUM1+2+IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug2')
GAMMA(IND1)=QFR(NUM2+2)
OUT=OUT+FUNKNO(IND1)*QFR(NUM2+2)
ENDIF
IALB=IQFR(NUM2+3)
IF((IALB.NE.0).AND.(QFR(NUM2+3).GT.0.0)) THEN
IND1=KN(NUM1+2+2*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug3')
GAMMA(IND1)=-QFR(NUM2+3)
OUT=OUT-FUNKNO(IND1)*QFR(NUM2+3)
ENDIF
IALB=IQFR(NUM2+4)
IF((IALB.NE.0).AND.(QFR(NUM2+4).GT.0.0)) THEN
IND1=KN(NUM1+2+3*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug4')
GAMMA(IND1)=QFR(NUM2+4)
OUT=OUT+FUNKNO(IND1)*QFR(NUM2+4)
ENDIF
IALB=IQFR(NUM2+5)
IF((IALB.NE.0).AND.(QFR(NUM2+5).GT.0.0)) THEN
IND1=KN(NUM1+2+4*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug5')
GAMMA(IND1)=-QFR(NUM2+5)
OUT=OUT-FUNKNO(IND1)*QFR(NUM2+5)
ENDIF
IALB=IQFR(NUM2+6)
IF((IALB.NE.0).AND.(QFR(NUM2+6).GT.0.0)) THEN
IND1=KN(NUM1+2+5*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug6')
GAMMA(IND1)=QFR(NUM2+6)
OUT=OUT+FUNKNO(IND1)*QFR(NUM2+6)
ENDIF
10 NUM1=NUM1+1+6*IELEM**2
NUM2=NUM2+6
20 CONTINUE
ELSE IF((ITYPE.NE.8).OR.(ITYPE.NE.9)) THEN
DO 40 K=1,NREG
IF(MAT(K).EQ.0) GO TO 40
IF(VOL(K).EQ.0.0) GO TO 30
IF((IALB.NE.0).AND.(QFR(NUM2+1).GT.0.0)) THEN
IND1=KN(NUM1+2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug7')
GAMMA(IND1)=-QFR(NUM2+1)
OUT=OUT-FUNKNO(IND1)*QFR(NUM2+1)
ENDIF
IALB=IQFR(NUM2+2)
IF((IALB.NE.0).AND.(QFR(NUM2+2).GT.0.0)) THEN
IND1=KN(NUM1+2+IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug8')
GAMMA(IND1)=QFR(NUM2+2)
OUT=OUT+FUNKNO(IND1)*QFR(NUM2+2)
ENDIF
IALB=IQFR(NUM2+3)
IF((IALB.NE.0).AND.(QFR(NUM2+3).GT.0.0)) THEN
IND1=KN(NUM1+2+2*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug9')
GAMMA(IND1)=-QFR(NUM2+3)
OUT=OUT-FUNKNO(IND1)*QFR(NUM2+3)
ENDIF
IALB=IQFR(NUM2+4)
IF((IALB.NE.0).AND.(QFR(NUM2+4).GT.0.0)) THEN
IND1=KN(NUM1+2+3*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug10')
GAMMA(IND1)=QFR(NUM2+4)
OUT=OUT+FUNKNO(IND1)*QFR(NUM2+4)
ENDIF
IALB=IQFR(NUM2+5)
IF((IALB.NE.0).AND.(QFR(NUM2+5).GT.0.0)) THEN
IND1=KN(NUM1+2+4*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug11')
GAMMA(IND1)=-QFR(NUM2+5)
OUT=OUT-FUNKNO(IND1)*QFR(NUM2+5)
ENDIF
IALB=IQFR(NUM2+6)
IF((IALB.NE.0).AND.(QFR(NUM2+6).GT.0.0)) THEN
IND1=KN(NUM1+2+5*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug12')
GAMMA(IND1)=QFR(NUM2+6)
OUT=OUT+FUNKNO(IND1)*QFR(NUM2+6)
ENDIF
IALB=IQFR(NUM2+7)
IF((IALB.NE.0).AND.(QFR(NUM2+7).GT.0.0)) THEN
IND1=KN(NUM1+2+6*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug13')
GAMMA(IND1)=-QFR(NUM2+7)
OUT=OUT-FUNKNO(IND1)*QFR(NUM2+7)
ENDIF
IALB=IQFR(NUM2+8)
IF((IALB.NE.0).AND.(QFR(NUM2+8).GT.0.0)) THEN
IND1=KN(NUM1+2+7*IELEM**2)
IF(IND1.LE.0) CALL XABORT('DREJ02: bug14')
GAMMA(IND1)=QFR(NUM2+8)
OUT=OUT+FUNKNO(IND1)*QFR(NUM2+8)
ENDIF
30 NUM1=NUM1+1+8*IELEM**2
NUM2=NUM2+8
40 CONTINUE
ELSE
CALL XABORT('DREJ02: TYPE OF GEOMETRY NOT IMPLEMENTED.')
ENDIF
RETURN
END
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