Merge pull request #13282 from drjfloyd/master

FDS User Guide: Tweak BNDF_MESH text Issue #13242

Manuals/FDS_User_Guide/FDS_User_Guide.tex

@@ -9885,7 +9885,7 @@ \section{Animated Boundary Quantities: The \texorpdfstring{{\tt BNDF}}{BNDF} Nam
 
 The {\ct BNDF} (``boundary file'') namelist group parameters allows you to record surface quantities at all solid obstructions. As with the {\ct SLCF} group, each quantity is prescribed with a separate {\ct BNDF} line, and the output files are of the form {\ct CHID\_$n$.bf}. No physical coordinates need be specified, however, just {\ct QUANTITY}. See Table \ref{tab:solidoutputquantities}. For certain output quantities, additional parameters need to be specified via the {\ct PROP} namelist group. In such cases, add the character string, {\ct PROP\_ID}, to the {\ct BNDF} line to tell FDS where to find the necessary extra information.
 
-{\ct BNDF} files (Sec.~\ref{out:BNDF}) can become very large, so be careful in prescribing the time interval, {\ct DT\_BNDF}, or discrete times, {\ct RAMP\_BNDF}, on the {\ct DUMP} line. One way to reduce the size of the output file is to turn off the drawing of boundary information on desired obstructions. On any given {\ct OBST} line, if the string {\ct BNDF\_OBST=F} is included, the obstruction is not colored. To turn off all boundary drawing, set {\ct BNDF\_DEFAULT=F} on the {\ct MISC} line. Then individual obstructions can be turned back on with {\ct BNDF\_OBST=T} on the appropriate {\ct OBST} line. Individual faces of a given obstruction can be controlled via {\ct BNDF\_FACE(IOR)}, where {\ct IOR} is the index of orientation (+1 for the positive $x$ direction, -1 for negative, and so on). Another way is to disable {\ct BNDF} output for specific meshes by setting {\ct BNDF\_MESH=F} on the {\ct MESH} lines where no {\ct BNDF} output is desired.
+{\ct BNDF} files (Sec.~\ref{out:BNDF}) can become very large, so be careful in prescribing the time interval, {\ct DT\_BNDF}, or discrete times, {\ct RAMP\_BNDF}, on the {\ct DUMP} line. One way to reduce the size of the output file is to turn off the drawing of boundary information on desired obstructions. On any given {\ct OBST} line, if the string {\ct BNDF\_OBST=F} is included, the obstruction is not colored. To turn off all boundary drawing, set {\ct BNDF\_DEFAULT=F} on the {\ct MISC} line. Then individual obstructions can be turned back on with {\ct BNDF\_OBST=T} on the appropriate {\ct OBST} line. Individual faces of a given obstruction can be controlled via {\ct BNDF\_FACE(IOR)}, where {\ct IOR} is the index of orientation (+1 for the positive $x$ direction, -1 for negative, and so on). Another way is to disable {\ct BNDF} output for specific meshes by setting {\ct BNDF\_MESH=F} on the {\ct MESH} lines where no {\ct BNDF} output is desired. Disabling output for a {\ct MESH} includes all wall cells at the exterior boundary of that {\ct MESH}.
 
 Normally, FDS averages boundary file data at cell corners. For example, surface temperatures are computed at the center of each surface cell, but they are linearly interpolated to cell corners and output to a file that is read by Smokeview. To prevent this from happening, set {\ct CELL\_CENTERED=T} on the {\ct BNDF} line. This forces FDS to output the actual cell-centered data with no averaging. Note that this feature is mainly useful for diagnostics.