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FDS Source: add TANGENTIAL VELOCITY output for B1%U_TANG #15147

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Merged
ericvmueller merged 1 commit into from
Sep 19, 2025
Merged

FDS Source: add TANGENTIAL VELOCITY output for B1%U_TANG #15147

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3 changes: 2 additions & 1 deletion Manuals/FDS_User_Guide/FDS_User_Guide.tex
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Expand Up @@ -2271,7 +2271,7 @@ \subsubsection{Default Convective Heat Transfer Model}
\end{center}
\end{table}

The length scale, $L$, is specified by \ct{CONVECTION_LENGTH_SCALE} on the \ct{SURF} line. By default, it is 1~m for plates, and the diameter of a sphere or cylinder.
The length scale, $L$, is specified by \ct{CONVECTION_LENGTH_SCALE} on the \ct{SURF} line. By default, it is 1~m for plates, and the diameter of a sphere or cylinder. The velocity used to compute Re can be output with the solid phase quantity \ct{'TANGENTIAL VELOCITY'}.

\subsubsection{Output for Convective Heat Transfer Regime}
\label{info:convection_regime}
Expand Down Expand Up @@ -11737,6 +11737,7 @@ \section{Solid Phase Output Quantities}
\ct{SUBSTEPS} & Section~\ref{info:solid_phase_stability} & & B,D \\ \hline
\ct{SURFACE DENSITY}$^4$ & Section~\ref{info:material_components} & kg/m$^2$ & B,D \\ \hline
\ct{SURFACE DEPOSITION}$^1$ & Section~\ref{info:deposition} & kg/m$^2$ & B,D \\ \hline
\ct{TANGENTIAL VELOCITY} & Section~\ref{info:convection} & m/s & B,D \\ \hline
\ct{TOTAL MASS FLUX WALL}$^1$ & Section~\ref{info:wallflux} & kg/s/m$^2$ & B,D \\ \hline
\ct{VELOCITY ERROR} & Section~\ref{info:PRES} & m/s & B,D \\ \hline
\ct{VISCOUS STRESS WALL} & Section~\ref{info:distributed_forces} & Pa & B,D \\ \hline
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4 changes: 4 additions & 0 deletions Source/data.f90
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Expand Up @@ -1752,6 +1752,10 @@ SUBROUTINE DEFINE_OUTPUT_QUANTITIES
OUTPUT_QUANTITY(-100)%SPEC_ID_REQUIRED = .FALSE.
OUTPUT_QUANTITY(-100)%BNDF_APPROPRIATE = .TRUE.

OUTPUT_QUANTITY(-101)%NAME = 'TANGENTIAL VELOCITY'
OUTPUT_QUANTITY(-101)%UNITS= 'm/s'
OUTPUT_QUANTITY(-101)%SHORT_NAME = 'u_tang'

END SUBROUTINE DEFINE_OUTPUT_QUANTITIES


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3 changes: 3 additions & 0 deletions Source/dump.f90
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Expand Up @@ -9538,6 +9538,9 @@ REAL(EB) FUNCTION SOLID_PHASE_OUTPUT(INDX,Y_INDEX,Z_INDEX,PART_INDEX,OPT_WALL_IN
CASE(100) ! CONDENSATION HEAT FLUX
SOLID_PHASE_OUTPUT = B1%Q_CONDENSE * 0.001_EB

CASE(101) ! TANGENTIAL VELOCITY
IF (ASSOCIATED(B1)) SOLID_PHASE_OUTPUT = B1%U_TANG

END SELECT SOLID_PHASE_SELECT

END FUNCTION SOLID_PHASE_OUTPUT
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