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FDS Source: Fix error applying INIT for duct nodes. #15105

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Merged
drjfloyd merged 1 commit into from
Sep 11, 2025
Merged

FDS Source: Fix error applying INIT for duct nodes. #15105

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19 changes: 14 additions & 5 deletions Source/hvac.f90
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Original file line number Diff line number Diff line change
Expand Up @@ -1297,9 +1297,11 @@ SUBROUTINE INIT_DUCT_NODE
USE PHYSICAL_FUNCTIONS, ONLY: GET_ENTHALPY
USE MATH_FUNCTIONS, ONLY: EVALUATE_RAMP
REAL(EB) :: ZZ_GET(1:N_TRACKED_SPECIES) !< Species mass fraction array.
REAL(EB) :: VF(1:N_TRACKED_SPECIES) !< Species volunme fraction array.
REAL(EB) :: TNOW !< Current CPU time (s) used in computing length of time spent in HVAC routines.
INTEGER :: NN,N
TYPE(DUCTNODE_TYPE), POINTER :: DN
TYPE(INITIALIZATION_TYPE), POINTER :: IN

TNOW = CURRENT_TIME()

Expand Down Expand Up @@ -1332,11 +1334,18 @@ SUBROUTINE INIT_DUCT_NODE

INIT_LOOP: DO N = 1,N_INIT
IF (TRIM(INITIALIZATION(N)%NODE_ID)==TRIM(DN%ID)) THEN
DN%ZZ0 = INITIALIZATION(N)%MASS_FRACTION
IF (INITIALIZATION(N)%TEMPERATURE > 0._EB) THEN
DN%TMP0 = INITIALIZATION(N)%TEMPERATURE
ELSE
DN%TMP0 = DN%TMP
IN => INITIALIZATION(N)
IF (IN%VOLUME_FRACTIONS_SPECIFIED) THEN
VF(2:N_TRACKED_SPECIES) = IN%VOLUME_FRACTION(2:N_TRACKED_SPECIES)
VF(1) = 1._EB - SUM(VF)
DN%ZZ0 = VF(1:N_TRACKED_SPECIES)*SPECIES_MIXTURE(1:N_TRACKED_SPECIES)%MW / &
SUM(VF(1:N_TRACKED_SPECIES)*SPECIES_MIXTURE(1:N_TRACKED_SPECIES)%MW)
ELSEIF (IN%MASS_FRACTIONS_SPECIFIED) THEN
DN%ZZ0(2:N_TRACKED_SPECIES) = IN%MASS_FRACTION(2:N_TRACKED_SPECIES)
DN%ZZ0(1) = 1._EB - SUM(DN%ZZ0(2:N_TRACKED_SPECIES))
ENDIF
IF (IN%TEMPERATURE > 0._EB) THEN
DN%TMP0 = IN%TEMPERATURE
ENDIF
EXIT INIT_LOOP
ENDIF
Expand Down
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