From aa44cde8e8ad2d87962a52c8bc1925f6fd6e2f51 Mon Sep 17 00:00:00 2001 From: Jason Floyd Date: Wed, 1 Nov 2023 09:21:19 -0400 Subject: [PATCH] FDS User Guide: Add || to Eq 10.8 for leak area --- Manuals/FDS_User_Guide/FDS_User_Guide.tex | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Manuals/FDS_User_Guide/FDS_User_Guide.tex b/Manuals/FDS_User_Guide/FDS_User_Guide.tex index 0b4cd86273c..030b7d4ef1d 100644 --- a/Manuals/FDS_User_Guide/FDS_User_Guide.tex +++ b/Manuals/FDS_User_Guide/FDS_User_Guide.tex @@ -3858,7 +3858,7 @@ \subsubsection{Pressure Zone Leakage} As the interior pressure rises in a typical building, the leakage area grows as small gaps, cracks, and other leakage paths open up. Leakage tests performed according to test standards such as ASTM~E779 provide two additional data points to quantify this behavior. These are the {\ct LEAK\_PRESSURE\_EXPONENT} and the {\ct LEAK\_REFERENCE\_PRESSURE}. The use of these additional inputs are shown in the equation below as $n$ and $\Delta p_{\rm ref}$ respectively where $A_{\rm L,ref}$ is given by {\ct LEAK\_AREA}. \be - A_{\rm L} = A_{\rm L,ref} \left( \frac{\Delta p}{\Delta p_{\rm ref}} \right)^{n-0.5} \label{leak_formula_2} + A_{\rm L} = A_{\rm L,ref} \left( \frac{\left| \Delta p \right|}{\Delta p_{\rm ref}} \right)^{n-0.5} \label{leak_formula_2} \ee By default, $n=0.5$ and $\Delta p_{\rm ref}=4$~Pa, meaning that the leak area will not change with pressure unless you specify an exponent other than 0.5. The {\ct DISCHARGE\_COEFFICIENT} is 1 by default.