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*DECK FLDBSS
SUBROUTINE FLDBSS(NAMP,IPTRK,IPSYS,LL4,NBMIX,NAN,F1,NADI)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Perform a one-group SPN flux iteration in Cartesian or hexagonal 2D
* geometry in BIVAC.
*
*Copyright:
* Copyright (C) 2004 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
* NAMP name of the coefficient matrix.
* IPTRK L_TRACK pointer to the tracking information.
* IPSYS L_SYSTEM pointer to system matrices.
* LL4 order of the matrix.
* NBMIX total number of material mixtures in the macrolib.
* NAN number of Legendre orders in the cross sections.
* F1 source term of the linear system.
* NADI number of inner ADI iterations.
*
*Parameters: output
* F1 approached solution of the linear system.
*
*-----------------------------------------------------------------------
*
USE GANLIB
*----
* SUBROUTINE ARGUMENTS
*----
TYPE(C_PTR) IPTRK,IPSYS
CHARACTER NAMP*(*)
INTEGER LL4,NBMIX,NAN,NADI
REAL F1(LL4)
*----
* LOCAL VARIABLES
*----
PARAMETER (NSTATE=40)
CHARACTER NAMT*12,TEXT12*12
INTEGER IPAR(NSTATE)
INTEGER, DIMENSION(:), ALLOCATABLE :: MAT,KEY,MU,KN,IQFR,IPERT
REAL, DIMENSION(:), ALLOCATABLE :: VOL,QFR,SOUR,SYS,XX,YY,GAMMA
REAL, DIMENSION(:,:), ALLOCATABLE :: SGD,R,V
*----
* SCRATCH STORAGE ALLOCATION
*----
ALLOCATE(SGD(NBMIX,NAN))
*----
* RECOVER PN SPECIFIC PARAMETERS.
*----
NAMT=NAMP
READ(NAMT,'(1X,2I3)') IGR,JGR
IF(IGR.NE.JGR) CALL XABORT('FLDBSS: INVALIB GROUP INDICES.')
IF(NAMT(1:1).NE.'A') CALL XABORT('FLDBSS: ''A'' MATRIX EXPECTED.')
CALL LCMGET(IPTRK,'STATE-VECTOR',IPAR)
NREG=IPAR(1)
NUN=IPAR(2)
ITYPE=IPAR(6)
IELEM=IPAR(8)
ICOL=IPAR(9)
ISPLH=IPAR(10)
L4=IPAR(11)
LX=IPAR(12)
NLF=IPAR(14)
ISPN=IPAR(15)
NVD=IPAR(17)
IF(ITYPE.EQ.8) THEN
IF(NUN.GT.(LX+L4)*NLF/2) CALL XABORT('FLDBSS: INVALID NUN OR '
1 //'L4.')
ELSE
IF(NUN.NE.L4*NLF/2) CALL XABORT('FLDBSS: INVALID NUN OR L4.')
ENDIF
IF(L4*NLF/2.NE.LL4) CALL XABORT('FLDBSS: INVALID L4 OR LL4.')
ALLOCATE(MAT(NREG),KEY(NREG),VOL(NREG),MU(L4))
CALL LCMGET(IPTRK,'MATCOD',MAT)
CALL LCMGET(IPTRK,'KEYFLX',KEY)
CALL LCMGET(IPTRK,'VOLUME',VOL)
CALL LCMGET(IPTRK,'MU',MU)
CALL LCMLEN(IPTRK,'KN',MAXKN,ITYLCM)
CALL LCMLEN(IPTRK,'QFR',MAXQF,ITYLCM)
ALLOCATE(KN(MAXKN),QFR(MAXQF),IQFR(MAXQF))
CALL LCMGET(IPTRK,'KN',KN)
CALL LCMGET(IPTRK,'QFR',QFR)
CALL LCMGET(IPTRK,'IQFR',IQFR)
*----
* PROCESS PHYSICAL ALBEDO FUNCTIONS
*----
TEXT12='ALBEDO-FU'//NAMT(2:4)
CALL LCMLEN(IPSYS,TEXT12,NALBP,ITYLCM)
IF(NALBP.GT.0) THEN
ALLOCATE(GAMMA(NALBP))
CALL LCMGET(IPSYS,TEXT12,GAMMA)
DO IQW=1,MAXQF
IALB=IQFR(IQW)
IF(IALB.NE.0) QFR(IQW)=QFR(IQW)*GAMMA(IALB)
ENDDO
DEALLOCATE(GAMMA)
ENDIF
*----
* RECOVER THE CROSS SECTIONS.
*----
DO 10 IL=1,NAN
WRITE(TEXT12,'(4HSCAI,I2.2,A6)') IL-1,NAMT(2:7)
CALL LCMGET(IPSYS,TEXT12,SGD(1,IL))
10 CONTINUE
*----
* RECOVER THE FINITE ELEMENT UNIT STIFFNESS MATRIX.
*----
CALL LCMSIX(IPTRK,'BIVCOL',1)
CALL LCMLEN(IPTRK,'T',LC,ITYLCM)
ALLOCATE(R(LC,LC),V(LC,LC-1))
CALL LCMGET(IPTRK,'R',R)
CALL LCMGET(IPTRK,'V',V)
CALL LCMSIX(IPTRK,' ',2)
*----
* SOLVE THE LINEAR SYSTEM.
*----
IIMAX=MU(L4)*NLF/2
ALLOCATE(SYS(IIMAX),SOUR(NUN))
CALL LCMGET(IPSYS,'I'//NAMT,SYS)
DO 30 IUN=1,NUN
SOUR(IUN)=F1(IUN)
F1(IUN)=0.0
30 CONTINUE
IF((ITYPE.EQ.2).OR.((ITYPE.EQ.5).AND.(ISPN.EQ.1))) THEN
ALLOCATE(XX(NREG),YY(NREG))
CALL LCMGET(IPTRK,'XX',XX)
CALL LCMGET(IPTRK,'YY',YY)
CALL PNFL2E(NREG,IELEM,ICOL,XX,YY,MAT,VOL,NBMIX,NLF,NVD,NAN,
1 SGD,L4,KN,QFR,MU,IIMAX,LC,R,V,SYS,SOUR,F1,NADI)
DEALLOCATE(YY,XX)
ELSE IF(ITYPE.EQ.8) THEN
CALL LCMGET(IPTRK,'SIDE',SIDE)
NBLOS=LX/3
ALLOCATE(IPERT(NBLOS))
CALL LCMGET(IPTRK,'IPERT',IPERT)
CALL PNFH2E(IELEM,ICOL,NBLOS,SIDE,NLF,NVD,L4,IPERT,KN,QFR,MU,
1 IIMAX,LC,V,SYS,SOUR,F1,NADI)
DEALLOCATE(IPERT)
ENDIF
DEALLOCATE(SOUR,SYS,V,R,IQFR,QFR,KN,MU,VOL,KEY,MAT)
*----
* SCRATCH STORAGE DEALLOCATION
*----
DEALLOCATE(SGD)
RETURN
END
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