PyroSim 2007 Release Notes

Posted: August 30th, 2007

PyroSim 2007 is a user interface for FDS 5 (updated from FDS 4). It can import FDS 4 and FDS 5 input files. It cannot be used to create input files for FDS 4 or run FDS 4 simulations. Users interested in FDS4 support can still use PyroSim 2006. This new version adds broader support for FDS and parallel execution.

PyroSim 2007.2 – January 24, 2008 (Minor Update)

Changes since PyroSim 2007.2 (January 15, 2008) include:

  • The examples manual now includes a section on importing FDS5 input files.
  • FDS5 input files are now shipped in the samples directory of PyroSim.
  • The uninstaller now displays the correct version number.

PyroSim 2007.2 – January 15, 2008

Changes since PyroSim 2007.1 include:

  • Copy, translate, mirror, and rotate can now be used on devices. This can be useful when creating arrays of thermocouples and other measurement devices.
  • The examples manual has been updated to include 3 new FDS5 examples.
  • The users manual has been updated to eliminate empty chapters – two new chapters have been added including information on devices and reactions.
  • PyroSim now supports the DELAY option for device activation.
  • Fixed a bug that caused PyroSim to crash when deleting a detector, dry pipe, or any quantity-measuring device when the current model also contained sprinklers or nozzles.
  • Vents now support radially spreading fires (SPREAD_RATE).
  • In models with multiple meshes, the Edit Meshes dialog will now warn users when the cells of two adjoining grids don’t line up properly or when two meshes overlap (see the FDS Users Guide Section 6.3.3: Mesh Alignment).
  • PyroSim now ships with version 5.1.0 of FDS and version 5.0.7 of Smokeview.
  • PyroSim now uses an updated version of its license protection library which may reduce licensing issues for some customers.

PyroSim 2007.1 – December 4, 2007

Changes since RC6 include:

  • Updated floating license instructions
  • Fixed a bug that prevented textures from working with Smokeview
  • Changed the SAWTOOTH default to TRUE for wall objects
  • Changed the reaction record to always contain C,O,H,N (even if default)

PyroSim 2007 RC6 – November 21, 2007

Changes since RC5 include:

  • Upgraded to FDS 5.0.2
  • Upgraded to Smokeview 5.0.5
  • Fixed a bug pointed out by Darryl Weinert at Umow Lai & Associates. When importing an FDS5 input file, if the file contained a special character (e.g. the degree symbol), all of the input records appearing before that character would be ignored.
  • Improved behavior (visibility) of licensing dialogs in certain cases
  • Changed the permissions on certain installed files to improve behavior under MS Windows Vista.
  • Changed the default location of the licensing files
  • Fixed a bug discovered by Edmond Ho that would cause PyroSim to crash in the record view after loading a PSM file created with a previous version of PyroSim
  • Updated the 2D results data reader to recognize quoted strings containing commas in FDS results data. This allows commas to be used when naming heat detectors and other devices.
  • Fixed a bug that caused extra species quantities not to be available on the gas-phase quantities list. This bug was also causing units to be listed incorrectly in the isosurfaces dialog.
  • On the advice of Bryan Klein, renamed Grids to Meshes in the PyroSim UI

PyroSim 2007 RC5 – October 24, 2007

Changes since RC4 include:

  • Support for 64-bit Microsoft Windows XP and Vista systems. We have upgraded the licensing library to support 64-bit architectures. Please note that the bundled version of FDS is still 32-bit. Also, integrated parallel execution with MPI does not yet work on 64-bit systems.
  • The installer will now work properly on systems that do not have Microsoft .NET 2.0 installed. This library is downloaded automatically (if needed) during the install process (requires Internet connection).
  • The installer will no longer fail when the CrypKey service cannot be started. Users will still have to run SETUP_EX.exe manually in this case.
  • Now Smokeview 5.0.1 is included in the PyroSim installer. This was incorrectly noted in the RC4 notes.
  • Updated users manual chapters: Working with Files, Output Controls, Surfaces, and Materials.
  • Added placeholder chapters for the following items: Reactions, Sprinklers, Measurement Devices, and Simulation Parameters. These represent the remaining work items on the users manual.
  • Other minor changes to the users manual (e.g. updated the address on the title page).
  • Changed the label on the heater/cooler surface editor from “Heat Release” to “Temperature.”

PyroSim 2007 RC4 – October 12, 2007

Changes since RC3 include:

  • Fixed the PSM file bug that caused us to remove the RC3 download link.
  • Fixed a bug that allowed solid phase devices to output gas phase quantities.
  • Added support for import of FDS4 THCP integrated quantities: VOLUME FLOW, MASS FLOW, HEAT FLOW, and HRR.
  • Removed POV-RAY options from the preferences dialog and added FDS and FDS+MPI executable locations.
  • Removed the Translate button from the toolbar (this option is still accessible via the Model menu).
  • Fixed a bug that was causing the incorrect path to be displayed when running parallel simulations.
  • Improved visual layout of the surface manager panels.
  • Fixed a bug that was causing multi-object editing to force objects to be unexpectedly merged.
  • Improved error logging.
  • Added simulation resume support via menu items.
  • Added license file to simulation folder.
  • In the Kill License dialog, changed instances of “Kill” to “Remove.”
  • Updated users manual sections: getting started, PyroSim basics, grids, particles, running the simulation, and geometry (basic concepts).
  • Added an appendix to the users manual: converting files designed to work with FDS4.
  • Changed the naming convention of blower and intake surfaces to “supply” and “exhaust.”
  • Fixed a bug that caused vents with the MB property set to be ignored when pasted.
  • Fixed a bug that caused the unit description text to become corrupted after importing a PyroSim 2006 PSM file.
  • Improved unit description text for the sprinkler model parameter C_FACTOR.
  • Reduced the size of the Material panel.

PyroSim 2007 RC3 – October 5, 2007

Today we discovered a bug in the way PyroSim 2007 RC3 loads and saves PSM files. Unfortunately, to minimize the impact of this bug on future versions of PyroSim, future versions will not support PSM files created with the RC3 beta version of PyroSim 2007. Previous release candidates are not affected by the bug. We are rolling back the current beta version to RC2.

If you have already installed the RC3 build, you should export your data to FDS to ensure that you can load it with future versions.

PyroSim 2007 RC3 – October 3, 2007

FDS 5 has been officially released by NIST. PyroSim 2007 RC3 now contains the official 5.0 version of FDS.

PyroSim 2007 RC2 – September 25, 2007

Changes since RC1 not mentioned in the previous post include:

  • Fixed a bug that caused PyroSim to crash when creating the first grid for a model that contained nested empty groups.
  • The Open Legacy PSM File warning now allows users to cancel the Open operation.
  • Fixed a bug that caused PyroSim to crash when loading very old models that contained unitless values.
  • Improved performance when deleting objects in large models.
  • Flammable solids with constant HRR from PyroSim 2006, were converted into burner surfaces but are now converted into heater/cooler surfaces.
  • Fixed a tree expansion bug that occurred when the model was reset.
  • Grids can now be selected with the selection box.
  • FDS CSV results that do not include an integer on the first line can now be shown in PyroSim. Results that include the integer can still be displayed.
  • Fixed a bug that was causing latching to be handled incorrectly on control and device outputs that are inverted.
  • Updated included FDS version to RC8 rev 697.
  • Fixed a bug that prevented PyroSim from importing CTRL records containing AT_LEAST and ONLY records.

PyroSim 2007 RC2 – September 20, 2007

We are working on a PyroSim 2007 RC2. It should be published in the next few days.

The following items will be completed prior to the RC2 beta release:

  • [Bug Fix] Objects intended to be deactivated by time devices never go away if the object is latched.
  • [Documentation] Tutorial to measure heat flux and layer height.

The following bugs with RC1 have been found and are already fixed:

  • Particle sampling factor would not write if set to 1 (not the default value).
  • SURF lines containing only SLIP_FACTOR would lose this property.
  • Crash when removing a component of a layer zoning device that was in use by another object.
  • Crash when loading PSM files that contained images generated from DXF files. Found by Brian Melly, Triad Fire.
  • Hiding or showing a group with children would not update the children properly.
  • Sprinklers and nozzles latch in cases not intended by PyroSim’s CTRL logic.
  • In some cases, unsupported records were not being added to the additional records section on import.

The following features have been added:

  • Added several undocumented FDS output quantities found only in examples and the FDS source code (e.g. HYDROGEN, SOOT).
  • Improved sprinkler write format for non-dry pipe sprinklers.
  • PyroSim now permits devices, profiles, and reactions to be imported without an ID.
  • It is now possible to set the temperature of surfaces, particles, and gauge heat flux devices to ambient by typing TMPA in the temperature field.
  • It is now possible to set the surface temperature of burner surfaces.
  • Thermocouples can now be created directly from the Devices menu.

PyroSim 2007 Alpha – August 30, 2007

We are in the process up migrating the PyroSim from FDS4 to FDS5. There are enough changes to the simulator that it will require significant changes to PyroSim.

Some of the major changes in FDS 5 are:

  • Separation of material specification from surfaces. This means you can create different materials and then use them in layers when specifying a surface.
  • A generalization of the concept of devices and sensors (sprinklers, heat detectors, thermocouples, etc.).
  • Increased flexibility and complexity in defining functions that control sprinkler activation and creation or removal of vents or obstructions.
  • Multi-step reaction that can describe phenomena such as local extinction and CO production.
  • Detailed changes in most of the FDS 5 input parameters.

In addition, some of the new features in PyroSim 2007 are:

  • Support for parallel processing on dual- and quad-core computers. PyroSim will install the required MPI (Message Passing Interface) modules and transparently run in parallel on multi-core processors.
  • Conversion of existing FDS 4 models to FDS 5.
  • Conversion of PyroSim 2006 models to PyroSim 2007 for FDS 5 models.

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