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Diffstat (limited to 'Dragon/src/MOCDDFL.f')
| -rw-r--r-- | Dragon/src/MOCDDFL.f | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/Dragon/src/MOCDDFL.f b/Dragon/src/MOCDDFL.f new file mode 100644 index 0000000..e04ae8a --- /dev/null +++ b/Dragon/src/MOCDDFL.f @@ -0,0 +1,99 @@ +*DECK MOCDDFL + SUBROUTINE MOCDDFL(N,NREG,NSOUT,M,NOM,NZON,H,SIGANG,DSIG,EXPT, + 1 EXP2,NMU,ZMU) +* +*----------------------------------------------------------------------- +* +*Purpose: +* Calculate coefficients of a track for the cyclic characteristics +* integration: DD1 Diamond-Differencing scheme without fix-up and +* 'source term isolation' option turned off. +* +*Copyright: +* Copyright (C) 2015 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 +* N number of elements in the current track. +* NREG number of volumes. +* NSOUT number of surfaces. +* M number of material mixtures. +* NOM vector containing the region number of the different segments +* of this track. +* NZON index-number of the mixture type assigned to each volume. +* H vector containing the lenght of the different segments of this +* track. +* SIGANG macroscopic total cross sections and albedos. +* NMU order of the polar quadrature set. +* ZMU inverse of polar quadrature cosines. +* +*Parameters: output +* DSIG macroscopic total cross sections. +* EXPT track coefficient. +* EXP2 quadratic expansion of (1-exp(-a*L))/L with small argument. +* +*----------------------------------------------------------------------- +* + IMPLICIT NONE +*---- +* SUBROUTINE ARGUMENTS +*---- + INTEGER N,NREG,NSOUT,M,NOM(N),NZON(-NSOUT:NREG),NMU + REAL SIGANG(-6:M),ZMU(NMU) + DOUBLE PRECISION H(N),DSIG(N),EXPT(NMU,N),EXP2(5,NMU,N) +*---- +* LOCAL VARIABLES +*---- + INTEGER I,NOMI,NUMOLD,NZI,IMU + DOUBLE PRECISION SQ3,TAUD,HID,H2,H3,DEN +* + SQ3=SQRT(3.0D0) + NUMOLD=NOM(1) + DO I=1,N + NOMI=NOM(I) + NZI=NZON(NOMI) + DSIG(I)=SIGANG(NZI) + IF(NZI.LT.0) THEN + DO IMU=1,NMU + EXP2(2,IMU,I)=0.D0 + EXP2(3,IMU,I)=0.D0 + EXP2(5,IMU,I)=0.D0 + ENDDO + IF(NUMOLD.NE.NOMI) THEN + DO IMU=1,NMU + EXP2(1,IMU,I)=SIGANG(NZI) + EXP2(4,IMU,I)=EXP2(1,IMU,I) + EXPT(IMU,I)=EXP2(1,IMU,I) + ENDDO + ELSE + DO IMU=1,NMU + EXP2(1,IMU,I)=1.D0 + EXP2(4,IMU,I)=1.D0 + EXPT(IMU,I)=EXP2(1,IMU,I) + ENDDO + ENDIF + ELSE + DO IMU=1,NMU + HID=DBLE(H(I)*ZMU(IMU)) + TAUD=SIGANG(NZI)*HID + H2=HID*HID + H3=H2*HID + DEN=(TAUD+6.0D0)*TAUD+12.0D0 + EXPT(IMU,I)=((TAUD-6.0D0)*TAUD+12.0D0)/DEN + EXP2(1,IMU,I)=12.0D0*HID/DEN + EXP2(2,IMU,I)=H2*(TAUD+6.0D0)/DEN + EXP2(3,IMU,I)=-2.0D0*SQ3*H3/DEN + EXP2(4,IMU,I)=-2.0D0*SQ3*TAUD/DEN + EXP2(5,IMU,I)=H3/DEN + ENDDO + ENDIF + NUMOLD=NOMI + ENDDO +* + RETURN + END |