Merge pull request #15634 from drjfloyd/master

drjfloyd · web-flow · commit 6eb50a31fb49 · 2025-11-30T10:44:54.000-05:00
FDS Verification: change to 10 K to avoid density clip
diff --git a/Manuals/FDS_Verification_Guide/FDS_Verification_Guide.tex b/Manuals/FDS_Verification_Guide/FDS_Verification_Guide.tex
@@ -3307,7 +3307,7 @@ \section{Radiation Shield (\texorpdfstring{\ct{radiation_shield}}{radiation_shie
 \section{Radiation from a gas-fired panel (\texorpdfstring{\ct{radiation_gas_panel}}{radiation_gas_panel}) }
 \label{radiation_gas_panel}
 
-A gas-fired panel is often used as a source of thermal radiation in laboratory experiments.  Here, the heat flux from an $h=30.48$~cm square panel is computed at distances of 10~cm, 15~cm, 25~cm, 38~cm, 46~cm, 61~cm, and 76~cm along its perpendicular center axis, and along a perpendicular line that is displaced laterally 14~cm and vertically 14~cm from the center axis, as illustrated in Fig.~\ref{radiation_gas_panel_plot}.  We compare the results computed by FDS to those calculated using configuration factors. The temperature and emissivity of the panel are set to 1250~K and 0.7, respectively, and the ambient temperature is 0~K.
+A gas-fired panel is often used as a source of thermal radiation in laboratory experiments.  Here, the heat flux from an $h=30.48$~cm square panel is computed at distances of 10~cm, 15~cm, 25~cm, 38~cm, 46~cm, 61~cm, and 76~cm along its perpendicular center axis, and along a perpendicular line that is displaced laterally 14~cm and vertically 14~cm from the center axis, as illustrated in Fig.~\ref{radiation_gas_panel_plot}.  We compare the results computed by FDS to those calculated using configuration factors. The temperature and emissivity of the panel are set to 1250~K and 0.7, respectively, and the ambient temperature is 10~K.
 
 The configuration factor, $\d F_{2 \rightarrow 1}$, describing the energy exchange between the radiant panel and a target with differential area $\d A_1$ located on a perpendicular line extending from the panel at the point  $(\overline{x}, \overline{y})$ is computed from the following:
 \begin{align}
diff --git a/Verification/Radiation/geom_rad.fds b/Verification/Radiation/geom_rad.fds
@@ -10,7 +10,7 @@
 
 &TIME T_END=2 /
 
-&MISC TMPA=-273.14/
+&MISC TMPA=-263.15/
 
 &SPEC ID='NITROGEN', BACKGROUND=.TRUE./
 
diff --git a/Verification/Radiation/geom_rad_2.fds b/Verification/Radiation/geom_rad_2.fds
@@ -15,7 +15,7 @@
 
 &TIME T_END=2 /
 
-&MISC TMPA=-273.14/
+&MISC TMPA=-263.15/
 
 &SPEC ID='NITROGEN', BACKGROUND=.TRUE./
 
diff --git a/Verification/Radiation/plate_view_factor_2D_100.fds b/Verification/Radiation/plate_view_factor_2D_100.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 105.34 kW/m2
 
 &TIME T_END=.1 DT = 0.001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 &RADI NUMBER_RADIATION_ANGLES = 100 /
 
diff --git a/Verification/Radiation/plate_view_factor_2D_30.fds b/Verification/Radiation/plate_view_factor_2D_30.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 105.34 kW/m2
 
 &TIME T_END=.1 DT = 0.001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 &RADI NUMBER_RADIATION_ANGLES = 30 /
 
diff --git a/Verification/Radiation/plate_view_factor_2D_60.fds b/Verification/Radiation/plate_view_factor_2D_60.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 105.34 kW/m2
 
 &TIME T_END=.1 DT = 0.001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 &RADI NUMBER_RADIATION_ANGLES = 60 /
 
diff --git a/Verification/Radiation/plate_view_factor_cart_100.fds b/Verification/Radiation/plate_view_factor_cart_100.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 81.8 kW/m2.
 
 &TIME T_END=.01 DT = 0.001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 
 
diff --git a/Verification/Radiation/plate_view_factor_cart_30.fds b/Verification/Radiation/plate_view_factor_cart_30.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 81.8 kW/m2.
 
 &TIME T_END=.01 DT = 0.001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 &RADI NUMBER_RADIATION_ANGLES = 30 /
 
diff --git a/Verification/Radiation/plate_view_factor_cart_60.fds b/Verification/Radiation/plate_view_factor_cart_60.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 81.8 kW/m2.
 
 &TIME T_END=.01 DT = 0.001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 &RADI NUMBER_RADIATION_ANGLES = 60 /
 
diff --git a/Verification/Radiation/plate_view_factor_cyl_100.fds b/Verification/Radiation/plate_view_factor_cyl_100.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 74.1 kW/m2
 
 &TIME T_END=.1 DT = 0.0001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 
 
diff --git a/Verification/Radiation/plate_view_factor_cyl_30.fds b/Verification/Radiation/plate_view_factor_cyl_30.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 74.1 kW/m2
 
 &TIME T_END=.1 DT = 0.0001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 
 
diff --git a/Verification/Radiation/plate_view_factor_cyl_60.fds b/Verification/Radiation/plate_view_factor_cyl_60.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 74.1 kW/m2
 
 &TIME T_END=.1 DT = 0.0001 /
 
-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/
+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/
 
 
 
diff --git a/Verification/Radiation/plate_view_factor_ibm_100.fds b/Verification/Radiation/plate_view_factor_ibm_100.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 81.8 kW/m2
 
 &TIME T_END=.01 DT=0.001 /
 
-&MISC GVEC=0,0,0, Y_CO2_INFTY=0., HUMIDITY=0.,TMPA=-273.14 /
+&MISC GVEC=0,0,0, Y_CO2_INFTY=0., HUMIDITY=0.,TMPA=-263.15 /
 
 &RADI NUMBER_RADIATION_ANGLES=100 /
 
diff --git a/Verification/Radiation/plate_view_factor_ibm_30.fds b/Verification/Radiation/plate_view_factor_ibm_30.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 81.8 kW/m2
 
 &TIME T_END=.01 DT=0.001 /
 
-&MISC GVEC=0,0,0, Y_CO2_INFTY=0., HUMIDITY=0.,TMPA=-273.14 /
+&MISC GVEC=0,0,0, Y_CO2_INFTY=0., HUMIDITY=0.,TMPA=-263.14 /
 
 &RADI NUMBER_RADIATION_ANGLES=30 /
 
diff --git a/Verification/Radiation/plate_view_factor_ibm_60.fds b/Verification/Radiation/plate_view_factor_ibm_60.fds
@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 81.8 kW/m2
 
 &TIME T_END=.01 DT=0.001 /
 
-&MISC GVEC=0,0,0, Y_CO2_INFTY=0., HUMIDITY=0.,TMPA=-273.14 /
+&MISC GVEC=0,0,0, Y_CO2_INFTY=0., HUMIDITY=0.,TMPA=-263.15 /
 
 &RADI NUMBER_RADIATION_ANGLES=60 /
 
diff --git a/Verification/Radiation/radiation_gas_panel.fds b/Verification/Radiation/radiation_gas_panel.fds
@@ -2,7 +2,7 @@
 
 &TIME T_END=1.5 /
 
-&MISC TMPA=-273.14 /
+&MISC TMPA=-263.15 /
 
 &MESH IJK=90,30,30, XB=0.0,0.3,-0.1524, 0.1524,-0.1524, 0.1524, MULT_ID='mesh' /
 &MULT ID='mesh', DX=0.3, I_UPPER=2 /

Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 81.8 kW/m2.`
`6`	`6`
`7`	`7`	`&TIME T_END=.01 DT = 0.001 /`
`8`	`8`
`9`		`-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/`
	`9`	`+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/`
`10`	`10`
`11`	`11`
`12`	`12`
Original file line number	Diff line number	Diff line change
`@@ -6,7 +6,7 @@ The RADIATIVE HEAT FLUX should be 74.1 kW/m2`
`6`	`6`
`7`	`7`	`&TIME T_END=.1 DT = 0.0001 /`
`8`	`8`
`9`		`-&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-273.14/`
	`9`	`+&MISC GVEC=0,0,0,Y_CO2_INFTY=0.,HUMIDITY=0.,TMPA=-263.14/`
`10`	`10`
`11`	`11`
`12`	`12`