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FDS User Guide: fix undefined reference for BLOWING #13961

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rmcdermo merged 1 commit into from
Dec 31, 2024
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FDS User Guide: fix undefined reference for BLOWING #13961

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11 changes: 4 additions & 7 deletions Manuals/FDS_User_Guide/FDS_User_Guide.tex
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Expand Up @@ -2282,14 +2282,11 @@ \subsubsection{Logarithmic Law of the Wall}
\subsubsection{Blowing Heat Transfer}
\label{info:blowing}

If a surface is emitting (``blowing'') or removing (``sucking'') gas, the flow normal to the surface disrupts the thermal boundary layer. Blowing tends to decrease the heat transfer coefficient while sucking tends to increase it. Adding \ct{BLOWING=T} to the \ct{SURF} line will account for this effect, except for DNS simulations where empirical heat transfer correlations are not used. When \ct{BLOWING=T}, the heat transfer coefficient is adjusted as follows~\cite{Plate_blowing}:
If a surface is emitting (``blowing'') or removing (``sucking'') gas, the flow normal to the surface disrupts the thermal boundary layer. Blowing tends to decrease the heat transfer coefficient while sucking tends to increase it. Adding \ct{BLOWING=T} to the \ct{SURF} line will account for this effect, except for DNS simulations where empirical heat transfer correlations are not used. When \ct{BLOWING=T}, the heat transfer coefficient is adjusted as follows~\cite{Plate_blowing,Taylor&Krishna}:
\begin{equation}
\Phi_h = \frac{\dot{m}'' c_p}{h}
h_{\rm blowing} = \underbrace{\left[\frac{\Phi_h}{{\exp}(\Phi_h)-1}\right]}_{{\mbox{\scriptsize \tt BLOWING CORRECTION}}} h \quad ; \quad \Phi_h = \frac{\dot{m}'' c_p}{h}
\end{equation}
\begin{equation}
h_{\rm blowing} = \underbrace{\left[\frac{\Phi_h}{{\exp}(\Phi_h)-1}\right]}_{{\mbox{\scriptsize \tt BLOWING CORRECTION}}} h
\end{equation}
where $h$ is the unadjusted heat transfer coefficient, $\dot{m}''$ is the mass flow rate per unit area (positive for blowing), and $c_p$ is the specific heat of the gas.
where $h$ is the unadjusted heat transfer coefficient, $\dot{m}''$ is the mass flow rate per unit area (positive for blowing), and $c_p$ is the specific heat of the gas.,

\subsection{Adiabatic Surfaces}
\label{info:adiabatic}
Expand Down Expand Up @@ -13359,7 +13356,7 @@ \section{\texorpdfstring{{\tt SURF}}{SURF} (Surface Properties)}
\ct{ALLOW_UNDERSIDE_PARTICLES} & Logical & Section~\ref{info:surface_droplets} & & \ct{F} \\ \hline
\ct{AREA_MULTIPLIER} & Real & Section~\ref{info:area_mult} & & 1.0 \\ \hline
\ct{BACKING} & Character & Section~\ref{info:BACKING} & & \ct{'EXPOSED'} \\ \hline
\ct{BLOWING} & Logical & Section~\ref{blowing} & & \\ \hline
\ct{BLOWING} & Logical & Section~\ref{info:blowing} & & \\ \hline
\ct{BURN_AWAY} & Logical & Section~\ref{info:BURN_AWAY} & & \ct{F} \\ \hline
\ct{BURN_DURATION} & Real & Section~\ref{info:BURN_DURATION} & s & 1000000 \\ \hline
\ct{CELL_SIZE(:)} & Real Array & Section~\ref{info:solid_phase_stability} & m & \\ \hline
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