Today

• 3 hours ago

  issue 801 (READONLY Error in FDS MPI version) changed by mcgratta   -   August 10, 2007? This is not even an official release of FDS. It was a "Release Candidate" or RC. You need to run this case with the latest version of FDS and then report if there are any problems.

  Summary: READONLY Error in FDS MPI version

  Status: MoreInfo

  Owner: mcgratta

  August 10, 2007? This is not even an official release of FDS. It was a "Release Candidate" or RC. You need to run this case with the latest version of FDS and then report if there are any problems.

  Summary: READONLY Error in FDS MPI version

  Status: MoreInfo

  Owner: mcgratta
• 4 hours ago

  verification_4285.tar.gz (Verification cases for FDS/Smokeview (SVN r4285 - Unix line ...) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-Unix Release-3_Maintenance

  Labels: Type-Archive Opsys-Unix Release-3_Maintenance
• 4 hours ago

  verification_4285.exe (Verification cases for FDS/Smokeview (SVN r4285 - Windows li...) file uploaded by gforney   -  

  Labels: Type-Installer Opsys-Windows Release-3_Maintenance

  Labels: Type-Installer Opsys-Windows Release-3_Maintenance
• 4 hours ago

  issue 801 (fort.31) reported by rbr...@fpc-consultants.com   -   Please complete the following lines... Application Version:5_rc8_mpi SVN Revision Number: Compile Date: Operating System: windows xp Describe details of the issue below: my mpi fds is giving me this error

  Please complete the following lines... Application Version:5_rc8_mpi SVN Revision Number: Compile Date: Operating System: windows xp Describe details of the issue below: my mpi fds is giving me this error
• 6 hours ago

  r4325 (FDS Source: Fix bug introduced in SVN 4224 where air blowing...) committed by mcgratta   -   FDS Source: Fix bug introduced in SVN 4224 where air blowing into compartment takes on local mass fraction.

  FDS Source: Fix bug introduced in SVN 4224 where air blowing into compartment takes on local mass fraction.
• 12 hours ago

  issue 797 (Numerical Instability) commented on by aymanhemdan1   -   I have already specified products yelds as shown in attached new file (wood.fds) with the same problem. You can check the HRR in the figure attached with increasing and decreasing to zero. That means there is no burning to the wood crips. I have tested this problem with the followng 1- SPRUSE surface as defined in charring_solid.fds example 2- CHAIR material with described directly the wood material Unfortunately, I have encountered the same problem but with changing the value of HRR but with the same trend.

  I have already specified products yelds as shown in attached new file (wood.fds) with the same problem. You can check the HRR in the figure attached with increasing and decreasing to zero. That means there is no burning to the wood crips. I have tested this problem with the followng 1- SPRUSE surface as defined in charring_solid.fds example 2- CHAIR material with described directly the wood material Unfortunately, I have encountered the same problem but with changing the value of HRR but with the same trend.
• 12 hours ago

  issue 800 (Different HRR before sprinkler activation) commented on by grue...@web.de   -   Thanks for the explanation. I tried the case with HUMIDITY=0 and the HRR was the same as in the simulation without sprinklers.

  Thanks for the explanation. I tried the case with HUMIDITY=0 and the HRR was the same as in the simulation without sprinklers.
• 16 hours ago

  r4324 (SMV UG/TG/VG: add future work/summary section to Smokeview g...) committed by gforney   -   SMV UG/TG/VG: add future work/summary section to Smokeview guides

  SMV UG/TG/VG: add future work/summary section to Smokeview guides

Yesterday

• 47 hours ago

  r4323 (Matlab scripts: Minor edits. ) committed by mcgratta   -   Matlab scripts: Minor edits.

  Matlab scripts: Minor edits.

Last 7 days

• Jul 04, 2009

  r4322 (FDS Source: For velocity BC, clarify which surface type is u...) committed by mcgratta   -   FDS Source: For velocity BC, clarify which surface type is used at an edge spanning two different BCs.

  FDS Source: For velocity BC, clarify which surface type is used at an edge spanning two different BCs.
• Jul 03, 2009

  issue 800 (Different HRR before sprinkler activation) changed by drjfloyd   -   The cases are not equal. Without a sprinkler FDS only has the two mixture fraction species (unburned and burned fuel). With a sprinkler FDS adds a third species for the water vapor from evaporated droplets. The initial concentration of the species is set to 40 % humidity. Thus, there will be subtle differences between the two since the case with sprinklers has slightly less oxygen (due to the initial water vapor).

  Status: WontFix

  Owner: drjfloyd

  Labels: OpSys-All Application-FDS

  The cases are not equal. Without a sprinkler FDS only has the two mixture fraction species (unburned and burned fuel). With a sprinkler FDS adds a third species for the water vapor from evaporated droplets. The initial concentration of the species is set to 40 % humidity. Thus, there will be subtle differences between the two since the case with sprinklers has slightly less oxygen (due to the initial water vapor).

  Status: WontFix

  Owner: drjfloyd

  Labels: OpSys-All Application-FDS
• Jul 03, 2009

  issue 797 (Numerical Instability) commented on by shostikk   -   You haven't specified any product yields of your WOOD material.

  You haven't specified any product yields of your WOOD material.
• Jul 03, 2009

  issue 800 (Different HRR before sprinkler activation) reported by grue...@web.de   -   Please complete the following lines... Application Version: fds 5.3.1 SVN Revision Number:3729 Compile Date: Apr 08 Operating System:Windows Vista I run two equal simulations with and without sprinkler (attached is a reduced version and the comparison file of the reduced version). The HRR before the sprinkler activation is strongly different(in the full version stronger than in the reduced). I compared the files. They are equal except for the sprinklers. Can anybody explain?

  Please complete the following lines... Application Version: fds 5.3.1 SVN Revision Number:3729 Compile Date: Apr 08 Operating System:Windows Vista I run two equal simulations with and without sprinkler (attached is a reduced version and the comparison file of the reduced version). The HRR before the sprinkler activation is strongly different(in the full version stronger than in the reduced). I compared the files. They are equal except for the sprinklers. Can anybody explain?
• Jul 03, 2009

  issue 797 (Numerical Instability) commented on by aymanhemdan1   -   I have added the HEAT_OF_REACTION. However, I have not encountered NUMERICAL INSTABILITY problem. I have another problem that the crip of wood did not burn. I noticed that the HRR increaed and decreased to zero after 60 second.

  I have added the HEAT_OF_REACTION. However, I have not encountered NUMERICAL INSTABILITY problem. I have another problem that the crip of wood did not burn. I noticed that the HRR increaed and decreased to zero after 60 second.
• Jul 03, 2009

  issue 797 (Numerical Instability) commented on by aymanhemdan1   -   I have added the HEAT_OF_REACTION. However, I have not encountered NUMERICAL INSTABILITY problem. I have another problem that crip did not burn. I noticed that the HRR

  I have added the HEAT_OF_REACTION. However, I have not encountered NUMERICAL INSTABILITY problem. I have another problem that crip did not burn. I noticed that the HRR
• Jul 03, 2009

  issue 797 (Numerical Instability) Status changed by shostikk   -   The gasoline material did not have HEAT_OF_REACTION. Zero HoR affects the Clasius-Clapeyron estimate of vapor pressure. I added a checking for this into read.f90. Kevin -- I also fixed the potential divide-by-zero by YPRSUM. The file runs now, at least up to 60 s. The updates will appear in FDS 5.4.0

  Status: Fixed

  The gasoline material did not have HEAT_OF_REACTION. Zero HoR affects the Clasius-Clapeyron estimate of vapor pressure. I added a checking for this into read.f90. Kevin -- I also fixed the potential divide-by-zero by YPRSUM. The file runs now, at least up to 60 s. The updates will appear in FDS 5.4.0

  Status: Fixed
• Jul 03, 2009

  r4321 (FDS Source: Add error checking for LIQUID HoR, fix div-by-ze...) committed by shostikk   -   FDS Source: Add error checking for LIQUID HoR, fix div-by-zero for LIQUID evaporation.

  FDS Source: Add error checking for LIQUID HoR, fix div-by-zero for LIQUID evaporation.
• Jul 03, 2009

  issue 796 (Bad programming style in init.f90) Status changed by tkorhon1   -   Ok. Lines like "IF (LAPSE_RATE /= 0._EB) THEN" should be ok, because the floating point number 0.0000E0 is easy for computers using binary number system, i.e., in binary it is full of zeros. All other exact real vs real checks are not meaningfull.

  Status: Verified

  Ok. Lines like "IF (LAPSE_RATE /= 0._EB) THEN" should be ok, because the floating point number 0.0000E0 is easy for computers using binary number system, i.e., in binary it is full of zeros. All other exact real vs real checks are not meaningfull.

  Status: Verified
• Jul 02, 2009

  r4320 (SMV build: correct typo) committed by gforney   -   SMV build: correct typo

  SMV build: correct typo
• Jul 02, 2009

  Smokeview_Release_Notes (Release notes for Smokeview) Wiki page edited by gforney
• Jul 02, 2009

  issue 796 (Bad programming style in init.f90) Status changed by mcgratta   -   I made a few fixes, but there are others. We'll eliminate them as we go.

  Status: Fixed

  I made a few fixes, but there are others. We'll eliminate them as we go.

  Status: Fixed
• Jul 02, 2009

  issue 641 (two ghost cells for flux limiter scheme) Labels changed by mcgratta   -   Marking as FDS 6.

  Labels: Milestone-FDS_6.0

  Marking as FDS 6.

  Labels: Milestone-FDS_6.0
• Jul 02, 2009

  issue 779 (THIEF cable failure model) Status changed by mcgratta   -   Done

  Status: Fixed

  Done

  Status: Fixed
• Jul 02, 2009

  issue 783 (Soot yield causes numerical instability) Status changed by mcgratta   -   I'm going to clear this off the Open issues. We can start it again if you find out something is wrong.

  Status: WontFix

  I'm going to clear this off the Open issues. We can start it again if you find out something is wrong.

  Status: WontFix
• Jul 02, 2009

  issue 795 (Numerical Instability) Status changed by mcgratta   -   I will mark this as "Won't Fix" just to clear it off the list of open issues. We can start it up again if you find something wrong.

  Status: WontFix

  I will mark this as "Won't Fix" just to clear it off the list of open issues. We can start it up again if you find something wrong.

  Status: WontFix
• Jul 02, 2009

  FDS_Release_Notes (Release Notes for Fire Dynamics Simulator (FDS)) Wiki page edited by mcgratta
• Jul 02, 2009

  r4317 (FDS Users Guide: Add description of THIEF model.) committed by mcgratta   -   FDS Users Guide: Add description of THIEF model.

  FDS Users Guide: Add description of THIEF model.
• Jul 02, 2009

  smv_5.4_win64.exe (Smokeview 5.4 for 64 bit Windows (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Installer Opsys-Windows_64 Release-3_Maintenance

  Labels: Type-Installer Opsys-Windows_64 Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_osx.tar.gz (Smokeview 5.4 for 32 bit OSX (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-OSX Release-3_Maintenance

  Labels: Type-Archive Opsys-OSX Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_linux_64.tar.gz (Smokeview 5.4 for 64 bit Linux (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-Linux_64 Release-3_Maintenance

  Labels: Type-Archive Opsys-Linux_64 Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_linux.tar.gz (Smokeview 5.4 for 32 bit Linux (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-Linux Release-3_Maintenance

  Labels: Type-Archive Opsys-Linux Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_win32.exe (Smokeview 5.4 for 32 bit Windows (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Installer Opsys-Windows Release-3_Maintenance

  Labels: Type-Installer Opsys-Windows Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_osx.tar.gz (Smokeview 5.4 for 32 bit OSX (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-OSX Release-3_Maintenance

  Labels: Type-Archive Opsys-OSX Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_linux.tar.gz (Smokeview 5.4 for 32 bit Linux (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-Linux Release-3_Maintenance

  Labels: Type-Archive Opsys-Linux Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_win32.exe (Smokeview 5.4 for 32 bit Windows (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Installer Opsys-Windows Release-3_Maintenance

  Labels: Type-Installer Opsys-Windows Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_osx.tar.gz (Smokeview 5.4 for 32 bit OSX (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-OSX Release-3_Maintenance

  Labels: Type-Archive Opsys-OSX Release-3_Maintenance
• Jul 02, 2009

  smv_5.4_linux.tar.gz (Smokeview 5.4 for 32 bit Linux (SVN r4315)) file uploaded by gforney   -  

  Labels: Type-Archive Opsys-Linux Release-3_Maintenance

  Labels: Type-Archive Opsys-Linux Release-3_Maintenance
• Jul 02, 2009

  r4316 (SMV build: update release notes for 5.4) committed by gforney   -   SMV build: update release notes for 5.4

  SMV build: update release notes for 5.4
• Jul 02, 2009

  r4315 (SMV: update version to 5.4) committed by gforney   -   SMV: update version to 5.4

  SMV: update version to 5.4
• Jul 02, 2009

  r4314 (SMV VG: fix typo) committed by gforney   -   SMV VG: fix typo

  SMV VG: fix typo
• Jul 02, 2009

  r4313 (SMV bib: add some references to smokeview bibliography) committed by gforney   -   SMV bib: add some references to smokeview bibliography

  SMV bib: add some references to smokeview bibliography
• Jul 02, 2009

  r4312 (SMV: update user, verification and technical guides) committed by gforney   -   SMV: update user, verification and technical guides

  SMV: update user, verification and technical guides
• Jul 02, 2009

  r4311 (SMV VG: update interpolation figure) committed by gforney   -   SMV VG: update interpolation figure

  SMV VG: update interpolation figure
• Jul 02, 2009

  issue 784 (HRR dropping sudenly) commented on by mcgratta   -   This version of FDS has not been released. You must wait for 5.4.0.

  This version of FDS has not been released. You must wait for 5.4.0.
• Jul 02, 2009

  issue 784 (HRR dropping sudenly) commented on by saumil2525   -   I tried to enter this feature but end up with some error.Can you pls send the .fds file.As I have been using Pyrosim as preprocessor I am facing difficulty with fds code syntax. Thanks Regards... Saumil

  I tried to enter this feature but end up with some error.Can you pls send the .fds file.As I have been using Pyrosim as preprocessor I am facing difficulty with fds code syntax. Thanks Regards... Saumil
• Jul 02, 2009

  issue 797 (Numerical Instability) Owner changed by mcgratta   -   I am turning the issue over to Simo Hostikka. Simo -- there are various problems with the file wood.fds, but I noticed in the latest version that YPRSUM can be zero and lead to an error where PPSURF=0 in the denominator of an expression.

  Owner: shostikk

  I am turning the issue over to Simo Hostikka. Simo -- there are various problems with the file wood.fds, but I noticed in the latest version that YPRSUM can be zero and lead to an error where PPSURF=0 in the denominator of an expression.

  Owner: shostikk
• Jul 02, 2009

  issue 797 (Numerical Instability) commented on by mcgratta   -   You cannot include only MLPUA and IGNITION_TEMPERATURE on the SURF line -- there is no way to know how rapidly the object would heat up. You need a MATL_ID and a THICKNESS too. Tell me if that helps.

  You cannot include only MLPUA and IGNITION_TEMPERATURE on the SURF line -- there is no way to know how rapidly the object would heat up. You need a MATL_ID and a THICKNESS too. Tell me if that helps.
• Jul 02, 2009

  issue 799 (SPEC in .out file) Owner changed by mcgratta   -  

  Owner: drjfloyd

  Owner: drjfloyd
• Jul 02, 2009

  issue 797 (Numerical Instability) commented on by mcgratta   -   Does the attached file fail after 5 iterations? Also, have you tried using FDS 5.3.1?

  Does the attached file fail after 5 iterations? Also, have you tried using FDS 5.3.1?
• Jul 02, 2009

  issue 797 (Numerical Instability) commented on by aymanhemdan1   -   I have already modeled pyrolysis including wood with thermal properties k, rho and c on MATL line. Then, MLRUA and IGNITION_TEMPERATURE on the SURF line. Unfortunately, I have encounterd the same problem after about 5 iterations. On the other hand, If I am working with burner as a fire source not a pool pan fire, it is working. I do not know if the problem with modelling wood or pool pan fire.

  I have already modeled pyrolysis including wood with thermal properties k, rho and c on MATL line. Then, MLRUA and IGNITION_TEMPERATURE on the SURF line. Unfortunately, I have encounterd the same problem after about 5 iterations. On the other hand, If I am working with burner as a fire source not a pool pan fire, it is working. I do not know if the problem with modelling wood or pool pan fire.