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FDS Verification: test TMP_GAS_BACK, EMISSIVITY_BACK and H_T_C_BACK #14872

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Merged
drjfloyd merged 1 commit into from
Jul 21, 2025
Merged

FDS Verification: test TMP_GAS_BACK, EMISSIVITY_BACK and H_T_C_BACK #14872

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32 changes: 23 additions & 9 deletions Manuals/FDS_Verification_Guide/FDS_Verification_Guide.tex
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Expand Up @@ -4602,18 +4602,32 @@ \section{Heat Conduction Through a Solid Slab (\texorpdfstring{\ct{heat\_conduct
\end{center}

\begin{figure}[ht]
\noindent
\begin{tabular*}{\textwidth}{l@{\extracolsep{\fill}}r}
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_a} &
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_b} \\
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_c} &
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_d}
\end{tabular*}
\caption[The \ct{heat\_conduction} test cases]{Comparison of heat conduction calculations with analytical solutions.}
\label{heat_conduction}
\noindent
\begin{tabular*}{\textwidth}{l@{\extracolsep{\fill}}r}
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_a} &
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_b} \\
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_c} &
\includegraphics[height=2.2in]{SCRIPT_FIGURES/heat_conduction_d}
\end{tabular*}
\caption[The \ct{heat\_conduction} test cases]{Comparison of heat conduction calculations with analytical solutions.}
\label{heat_conduction}
\end{figure}

\section{Heat Conduction Through a Solid Slab Part 2 (\texorpdfstring{\ct{back\_wall}}{back\_wall})}
\label{back_wall}

A slab of thickness $L=0.01$~m with a conductivity of 10~\si{W/(m.K)} is exposed to a backside temperature of $T_g=200$~\si{\degree C}.
The backside heat transfer conditions are $h$=50~\si{W/(m^2.K)} and $e$=0.5. The frontside heat transfer conditions are $h$=10~\si{W/(m^2.K)} and $e$=1.
This case test that both sets of conditions are applied.

\begin{figure}[ht]
\centering
\begin{tabular}{c}
\includegraphics[height=2.2in]{SCRIPT_FIGURES/back_wall}
\end{tabular}
\caption[Front and back wall temperatures for the \ct{back\_wall} case]{Front and back wall temperatures for the \ct{back\_wall} case}
\label{fig:back_wall}
\end{figure}

\section{Temperature-Dependent Thermal Properties (\texorpdfstring{\ct{heat\_conduction\_kc}}{heat\_conduction\_kc})}
\label{heat_conduction_kc}
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1 change: 1 addition & 0 deletions Utilities/Matlab/FDS_verification_dataplot_inputs.csv
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Expand Up @@ -287,6 +287,7 @@ f,ground_vegetation_load,WUI/ground_vegetation_load_git.txt,WUI/ground_vegetatio
d,ground_vegetation_radi,WUI/ground_vegetation_radi_git.txt,WUI/ground_vegetation_radi.csv,1,2,Time,HF,Expected,ko,0,100000,,0,100000,-1.00E+09,1.00E+09,0,WUI/ground_vegetation_radi_devc.csv,2,3,Time,hf 1|hf 2,Boundary Fuel Model|Particles,k-|r-,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Heat Flux (ground\_vegetation\_radi),Time (s),Heat Flux (kW/m²),0,1,1,0,25,1,no,0.05 0.90,SouthEast,,1,linear,FDS_User_Guide/SCRIPT_FIGURES/ground_vegetation_radi_HF,Relative Error,end_1_1,0.2,Pyrolysis,kd,k,TeX
s,ground_vegetation_ros,WUI/ground_vegetation_ros_10cm_git.txt,WUI/ground_vegetation_ros_10cm_devc.csv,2,3,Time,x1,Boundary Fuel Model 10 cm,k-.,0,100000,,50,100,2.00E+00,1.00E+01,0,WUI/ground_vegetation_ros_10cm_devc.csv,2,3,Time,x2,Particle Model 10 cm,r-.,0,100000,,50,100,2.00E+00,1.00E+01,0,Rate of Spread (ground\_vegetation\_ros),Time (s),Front Position (m),0,180,1,0,12,1,no,0.05 0.90,SouthEast,,1,linear,FDS_User_Guide/SCRIPT_FIGURES/ground_vegetation_ros,Relative Error,slope,0.1,Pyrolysis,kd,k,TeX
d,hallways,Pressure_Solver/hallways_git.txt,Pressure_Solver/hallways_hrr.csv,2,3,Time,Q_ENTH,Q\_ENTH,k-,0,100000,,50,60,-1.00E+09,1.00E+09,0,Pressure_Solver/hallways_hrr.csv,2,3,Time,Q_TOTAL,Q\_TOTAL,r-,0,100000,,50,60,-1.00E+09,1.00E+09,0,Energy Budget (hallways),Time (s),Rate of Energy Change (kW),0,60,1,-20,180,1,no,0.05 0.90,East,,1,linear,FDS_User_Guide/SCRIPT_FIGURES/hallways,Absolute Error,mean,3,Flowfields,r^,r,TeX
d,back_wall,Heat_Transfer/back_wall_git.txt,Heat_Transfer/back_wall.csv,1,2,Time,Back|Front,Analytical (Back)|Analytical (Front),ko|ro,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Heat_Transfer/back_wall_devc.csv,2,3,Time,Back|Front,FDS (Back)|FDS (Front),k-|r-,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Surface Temperatrure (back\_wall),Time (s),Temperature (°C),0,2000,1,0,180,1,no,0.05 0.90,SouthEast,,1,linear,FDS_Verification_Guide/SCRIPT_FIGURES/back_wall,Relative Error,end,0.001,Heat Transfer,b^,b,TeX
d,heat_conduction_a,Heat_Transfer/heat_conduction_a_git.txt,Heat_Transfer/heat_conduction_a.csv,1,2,Time,Front|4 cm|Back,Analytical (Front)|Analytical (4 cm)|Analytical (Back),go|ro|ko,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Heat_Transfer/heat_conduction_a_devc.csv,2,3,Time,Front|4 cm|Back,FDS (Front)|FDS (4 cm)|FDS (Back),g-|r-|k-,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Slab Temperature (heat\_conduction\_a),Time (min),Temperature (°C),0,30,60,0,150,1,no,0.05 0.90,East,,1,linear,FDS_Verification_Guide/SCRIPT_FIGURES/heat_conduction_a,Relative Error,end,0.01,Heat Transfer,r^,r,TeX
d,heat_conduction_b,Heat_Transfer/heat_conduction_b_git.txt,Heat_Transfer/heat_conduction_b.csv,1,2,Time,Front|4 cm|Back,Analytical (Front)|Analytical (4 cm)|Analytical (Back),go|ro|ko,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Heat_Transfer/heat_conduction_b_devc.csv,2,3,Time,Front|4 cm|Back,FDS (Front)|FDS (4 cm)|FDS (Back),g-|r-|k-,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Slab Temperature (heat\_conduction\_b),Time (min),Temperature (°C),0,233,60,0,150,1,no,0.05 0.90,SouthEast,,1,linear,FDS_Verification_Guide/SCRIPT_FIGURES/heat_conduction_b,Relative Error,end,0.01,Heat Transfer,r^,r,TeX
d,heat_conduction_c,Heat_Transfer/heat_conduction_c_git.txt,Heat_Transfer/heat_conduction_c.csv,1,2,Time,Front|4 cm|Back,Analytical (Front)|Analytical (4 cm)|Analytical (Back),go|ro|ko,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Heat_Transfer/heat_conduction_c_devc.csv,2,3,Time,Front|4 cm|Back,FDS (Front)|FDS (4 cm)|FDS (Back),g-|r-|k-,0,100000,,0,100000,-1.00E+09,1.00E+09,0,Slab Temperature (heat\_conduction\_c),Time (min),Temperature (°C),0,600,60,0,150,1,no,0.05 0.90,SouthEast,,1,linear,FDS_Verification_Guide/SCRIPT_FIGURES/heat_conduction_c,Relative Error,end,0.01,Heat Transfer,r^,r,TeX
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3 changes: 3 additions & 0 deletions Verification/Heat_Transfer/back_wall.csv
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@@ -0,0 +1,3 @@
Time,Back,Front
1500,154.51,151.76
2000,154.51,151.76
26 changes: 26 additions & 0 deletions Verification/Heat_Transfer/back_wall.fds
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@@ -0,0 +1,26 @@
&HEAD CHID='back_wall',TITLE='Test of BACK_WALL inputs'/

&MESH XB=0,1,0,1,0,1,IJK=4,4,4/

&MISC SOLID_PHASE_ONLY=T/

&TIME T_END=2000,DT=0.1/

&DUMP NFRAMES=100,SIG_FIGS=5/

&MATL ID='MATL',SPECIFIC_HEAT=1,CONDUCTIVITY=10,EMISSIVITY=1,DENSITY=1000/

&SURF ID='SURF',
MATL_ID='MATL',
THICKNESS=0.01,
BACKING='EXPOSED',
EMISSIVITY_BACK=0.5,
HEAT_TRANSFER_COEFFICIENT_BACK=50,
TMP_GAS_BACK=200,
HEAT_TRANSFER_COEFFICIENT=10/

&VENT XB=0.25,0.50,0.25,0.50,0.0,0.0,SURF_ID='SURF',COLOR='RED'/

&DEVC QUANTITY='BACK WALL TEMPERATURE',XYZ=0.375,0.375,0,IOR=3,ID='Back'/
&DEVC QUANTITY='WALL TEMPERATURE',XYZ=0.375,0.375,0,IOR=3,ID='Front'/