Merge pull request #14010 from rmcdermo/master

FDS Source: rename CHAR_FRONT to ASH_DEPTH in TEST_NEW_CHAR_MODEL

Author: rmcdermo

Source/dump.f90

@@ -8523,7 +8523,7 @@ REAL(EB) FUNCTION SOLID_PHASE_OUTPUT(INDX,Y_INDEX,Z_INDEX,PART_INDEX,OPT_WALL_IN
 INTEGER, INTENT(IN), OPTIONAL :: OPT_WALL_INDEX,OPT_LP_INDEX,OPT_CFACE_INDEX,OPT_BNDF_INDEX,OPT_DEVC_INDEX,OPT_CUT_FACE_INDEX,&
                                  OPT_NODE_INDEX,OPT_PROF_INDEX
 INTEGER, INTENT(IN) :: INDX,Y_INDEX,Z_INDEX,PART_INDEX
-REAL(EB) :: Q_CON,RHOSUM,VOLSUM,ZZ_GET(1:N_TRACKED_SPECIES),Y_SPECIES,DEPTH,CHAR_FRONT,UN,H_S,RHO_D_DYDN,U_CELL,V_CELL,W_CELL,&
+REAL(EB) :: Q_CON,RHOSUM,VOLSUM,ZZ_GET(1:N_TRACKED_SPECIES),Y_SPECIES,DEPTH,ASH_DEPTH,UN,H_S,RHO_D_DYDN,U_CELL,V_CELL,W_CELL,&
             LTMP,ATMP,CTMP,H_W_EFF,X0,VOL,DN,PRESS,&
             NVEC(3),PVEC(3),TAU_IJ(3,3),VEL_CELL(3),VEL_WALL(3),MU_WALL,RHO_WALL,FVEC(3),SVEC(3),TVEC1(3),TVEC2(3),&
             PR1,PR2,Z1,Z2,RADIUS,CUT_FACE_AREA,SOLID_PHASE_OUTPUT_CTF,AAA,BBB,CCC,ALP,BET,GAM,MMM,DTMP
@@ -9278,9 +9278,9 @@ REAL(EB) FUNCTION SOLID_PHASE_OUTPUT(INDX,Y_INDEX,Z_INDEX,PART_INDEX,OPT_WALL_IN
          ! for the moment this assumes there is only one char reaction
          IF (ML%N_O2(1)>0._EB) THEN
             DEPTH = 0.5_EB*(ONE_D%X(I_DEPTH-1)+ONE_D%X(I_DEPTH))
-            CHAR_FRONT = 0._EB
-            IF (TEST_NEW_CHAR_MODEL) CHAR_FRONT = ONE_D%X(B2%I_CHAR_FRONT-1)
-            SOLID_PHASE_OUTPUT = B2%Y_O2_F*EXP(-MAX(0._EB,DEPTH-CHAR_FRONT)/(TWO_EPSILON_EB+ML%GAS_DIFFUSION_DEPTH(1)))
+            ASH_DEPTH = 0._EB
+            IF (TEST_NEW_CHAR_MODEL) ASH_DEPTH = ONE_D%X(B2%I_ASH_DEPTH-1)
+            SOLID_PHASE_OUTPUT = B2%Y_O2_F*EXP(-MAX(0._EB,DEPTH-ASH_DEPTH)/(TWO_EPSILON_EB+ML%GAS_DIFFUSION_DEPTH(1)))
          ENDIF
       ENDIF
    CASE(82) ! BLOWING CORRECTION

Source/type.f90

@@ -363,7 +363,7 @@ MODULE TYPES
    INTEGER :: SURF_INDEX=-1          !< Surface index
    INTEGER :: HEAT_TRANSFER_REGIME=0 !< 1=Forced convection, 2=Natural convection, 3=Impact convection, 4=Resolved
    INTEGER :: Y_O2_ITER=0            !< Number of iterations for surface O2 solve
-   INTEGER :: I_CHAR_FRONT=1         !< Index of solid cell where char formation starts
+   INTEGER :: I_ASH_DEPTH=1          !< Index of solid cell where char formation starts
 
 END TYPE BOUNDARY_PROP2_TYPE
 

Source/wall.f90

@@ -2883,7 +2883,7 @@ SUBROUTINE PERFORM_PYROLYSIS
 USE PHYSICAL_FUNCTIONS, ONLY: GET_MASS_FRACTION,GET_SPECIFIC_HEAT
 REAL(EB), DIMENSION(N_TRACKED_SPECIES) :: M_DOT_G_PPP_ADJUST,M_DOT_G_PPP_ACTUAL,ZZ_GET
 REAL(EB), DIMENSION(MAX_MATERIALS) :: RHO_TEMP,M_DOT_S_PPP
-REAL(EB) :: Q_DOT_G_PPP,Q_DOT_O2_PPP,CP_FILM,TMP_FILM,H_MASS,CHAR_FRONT,&
+REAL(EB) :: Q_DOT_G_PPP,Q_DOT_O2_PPP,CP_FILM,TMP_FILM,H_MASS,ASH_DEPTH,&
             Y_O2_G,Y_O2_F,M_DOT_O2_PP,Y_LOWER,Y_UPPER,M_DOT_ERROR,M_DOT_ERROR_OLD,Y_O2_F_OLD,DY,DE
 REAL(EB), DIMENSION(MAX_LPC) :: Q_DOT_PART,M_DOT_PART
 INTEGER :: ITER,MAX_ITER
@@ -2901,17 +2901,17 @@ SUBROUTINE PERFORM_PYROLYSIS
 
 ! Determine char front position
 
-CHAR_FRONT=0._EB
+ASH_DEPTH=0._EB
 IF (TEST_NEW_CHAR_MODEL .AND. Y_O2_F>TWO_EPSILON_EB .AND. CHAR_INDEX>0) THEN
-   ! The new char model starts the exp profile of O2 at the CHAR_FRONT
+   ! The new char model starts the exp profile of O2 at the ASH_DEPTH
    ! Find first cell where char has not been consumed
-   CHAR_FRONT_POINTS_LOOP: DO I=B2%I_CHAR_FRONT,NWP
+   ASH_DEPTH_POINTS_LOOP: DO I=B2%I_ASH_DEPTH,NWP
       IF (ONE_D%MATL_COMP(CHAR_INDEX)%RHO(I)>CHAR_DENSITY_THRESHOLD) THEN
-         CHAR_FRONT=ONE_D%X(I-1)
-         B2%I_CHAR_FRONT=I ! store last position to save time on next time step
-         EXIT CHAR_FRONT_POINTS_LOOP
+         ASH_DEPTH=ONE_D%X(I-1)
+         B2%I_ASH_DEPTH=I ! store last position to save time on next time step
+         EXIT ASH_DEPTH_POINTS_LOOP
       ENDIF
-   ENDDO CHAR_FRONT_POINTS_LOOP
+   ENDDO ASH_DEPTH_POINTS_LOOP
 ENDIF
 
 ! Initialize iterations for OXPYRO_MODEL
@@ -2964,13 +2964,13 @@ SUBROUTINE PERFORM_PYROLYSIS
 
       IF (PRESENT(PARTICLE_INDEX)) THEN
          CALL PYROLYSIS(ONE_D%N_MATL,ONE_D%MATL_INDEX,SURF_INDEX,BC%IIG,BC%JJG,BC%KKG,ONE_D%TMP(I),B1%TMP_F,Y_O2_F,BC%IOR,&
-                        RHO_DOT(1:ONE_D%N_MATL,I),RHO_TEMP(1:ONE_D%N_MATL),ONE_D%X(I-1),CHAR_FRONT,DX_S,DT_BC_SUB,&
+                        RHO_DOT(1:ONE_D%N_MATL,I),RHO_TEMP(1:ONE_D%N_MATL),ONE_D%X(I-1),ASH_DEPTH,DX_S,DT_BC_SUB,&
                         M_DOT_G_PPP_ADJUST,M_DOT_G_PPP_ACTUAL,M_DOT_S_PPP,Q_S(I),Q_DOT_G_PPP,Q_DOT_O2_PPP,&
                         Q_DOT_PART,M_DOT_PART,T_BOIL_EFF,B1%B_NUMBER,LAYER_INDEX(I),REMOVE_LAYER,ONE_D,B1,SOLID_CELL_INDEX=I,&
                         R_DROP=R_SURF,LPU=U_SURF,LPV=V_SURF,LPW=W_SURF)
       ELSE
          CALL PYROLYSIS(ONE_D%N_MATL,ONE_D%MATL_INDEX,SURF_INDEX,BC%IIG,BC%JJG,BC%KKG,ONE_D%TMP(I),B1%TMP_F,Y_O2_F,BC%IOR,&
-                        RHO_DOT(1:ONE_D%N_MATL,I),RHO_TEMP(1:ONE_D%N_MATL),0.5*(ONE_D%X(I-1)+ONE_D%X(I)),CHAR_FRONT,DX_S,DT_BC_SUB,&
+                        RHO_DOT(1:ONE_D%N_MATL,I),RHO_TEMP(1:ONE_D%N_MATL),0.5*(ONE_D%X(I-1)+ONE_D%X(I)),ASH_DEPTH,DX_S,DT_BC_SUB,&
                         M_DOT_G_PPP_ADJUST,M_DOT_G_PPP_ACTUAL,M_DOT_S_PPP,Q_S(I),Q_DOT_G_PPP,Q_DOT_O2_PPP,&
                         Q_DOT_PART,M_DOT_PART,T_BOIL_EFF,B1%B_NUMBER,LAYER_INDEX(I),REMOVE_LAYER,ONE_D,B1,SOLID_CELL_INDEX=I)
       ENDIF
@@ -3057,7 +3057,7 @@ END SUBROUTINE SOLID_HEAT_TRANSFER
 !> \param RHO_DOT_OUT (1:N_MATS) Array of component reaction rates (kg/m3/s)
 !> \param RHO_S (1:N_MATS) Array of component densities (kg/m3)
 !> \param DEPTH Distance from surface (m)
-!> \param CHAR_FRONT Distance from surface to start of char front (m)
+!> \param ASH_DEPTH Distance from surface to start of char front (m)
 !> \param DX_S Array of node sizes (m)
 !> \param DT_BC Time step used by the solid phase solver (s)
 !> \param M_DOT_G_PPP_ADJUST (1:N_TRACKED_SPECIES) Adjusted mass generation rate per unit volume of the gas species
@@ -3081,7 +3081,7 @@ END SUBROUTINE SOLID_HEAT_TRANSFER
 !> \param LPW (OPTIONAL) z component of droplet velocity (m/s)
 
 SUBROUTINE PYROLYSIS(N_MATS,MATL_INDEX,SURF_INDEX,IIG,JJG,KKG,TMP_S,TMP_F,Y_O2_F,IOR,&
-                     RHO_DOT_OUT,RHO_S,DEPTH,CHAR_FRONT,DX_S,DT_BC,&
+                     RHO_DOT_OUT,RHO_S,DEPTH,ASH_DEPTH,DX_S,DT_BC,&
                      M_DOT_G_PPP_ADJUST,M_DOT_G_PPP_ACTUAL,M_DOT_S_PPP,Q_DOT_S_PPP,Q_DOT_G_PPP,Q_DOT_O2_PPP,&
                      Q_DOT_PART,M_DOT_PART,T_BOIL_EFF,B_NUMBER,LAYER_INDEX,REMOVE_LAYER,ONE_D,B1,SOLID_CELL_INDEX,&
                      R_DROP,LPU,LPV,LPW)
@@ -3094,7 +3094,7 @@ SUBROUTINE PYROLYSIS(N_MATS,MATL_INDEX,SURF_INDEX,IIG,JJG,KKG,TMP_S,TMP_F,Y_O2_F
 INTEGER, INTENT(IN), OPTIONAL :: SOLID_CELL_INDEX
 LOGICAL, INTENT(IN) :: REMOVE_LAYER
 REAL(EB), INTENT(OUT), DIMENSION(:,:) :: RHO_DOT_OUT(N_MATS)
-REAL(EB), INTENT(IN) :: TMP_S,TMP_F,DT_BC,DEPTH,RHO_S(N_MATS),Y_O2_F,CHAR_FRONT
+REAL(EB), INTENT(IN) :: TMP_S,TMP_F,DT_BC,DEPTH,RHO_S(N_MATS),Y_O2_F,ASH_DEPTH
 REAL(EB), INTENT(IN), OPTIONAL :: R_DROP,LPU,LPV,LPW
 REAL(EB), INTENT(IN), DIMENSION(NWP_MAX) :: DX_S
 REAL(EB), DIMENSION(:) :: ZZ_GET(1:N_TRACKED_SPECIES),Y_ALL(1:N_SPECIES)
@@ -3377,7 +3377,7 @@ SUBROUTINE PYROLYSIS(N_MATS,MATL_INDEX,SURF_INDEX,IIG,JJG,KKG,TMP_S,TMP_F,Y_O2_F
                ! Calculate oxygen volume fraction at the surface
                X_O2 = SPECIES(O2_INDEX)%RCON*Y_O2_F/RSUM(IIG,JJG,KKG)
                ! Calculate oxygen concentration inside the material, assuming decay function
-               X_O2 = X_O2 * EXP(-MAX(0._EB,DEPTH-CHAR_FRONT)/(TWO_EPSILON_EB+ML%GAS_DIFFUSION_DEPTH(J)))
+               X_O2 = X_O2 * EXP(-MAX(0._EB,DEPTH-ASH_DEPTH)/(TWO_EPSILON_EB+ML%GAS_DIFFUSION_DEPTH(J)))
                REACTION_RATE = REACTION_RATE * X_O2**ML%N_O2(J)
             ENDIF
             REACTION_RATE = MIN(REACTION_RATE,ML%MAX_REACTION_RATE(J))  ! User-specified limit