FDS and Smokeview Discussions

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As of March 21, 2024, the FDS and Smokeview Discussion Forum has moved to:

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0 selected

Ryu_Kor, … Kevin8

Mar 21

Questions about initial perturbations in LES & Vertical wind and temperature profiles

This thread is now here

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Questions about initial perturbations in LES & Vertical wind and temperature profiles

This thread is now here

Mar 21

zishanul haque hussain, … Kevin6

Mar 21

Issue with pyro3d_wood_char.fds

This discussion is continued here

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Issue with pyro3d_wood_char.fds

This discussion is continued here

Mar 21

Kevin

Mar 21

Good-bye GoogleGroups

We have released a new version of FDS, 6.9.0, and with that we are sun-setting this discussion forum.

unread,

Good-bye GoogleGroups

We have released a new version of FDS, 6.9.0, and with that we are sun-setting this discussion forum.

Mar 21

Muneeb Khalid, Randy McDermott4

Mar 21

FDS Extract Surface

Please just use the GitHub thread. Thanks On Thu, Mar 21, 2024 at 8:11 AM Muneeb Khalid <khalid.

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FDS Extract Surface

Please just use the GitHub thread. Thanks On Thu, Mar 21, 2024 at 8:11 AM Muneeb Khalid <khalid.

Mar 21

Randy McDermott2

Mar 20

imminent minor release and migration to GitHub discussions

Well, I lied. Google gets a stay. We ended up with a couple more issues to sort out today. So,

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imminent minor release and migration to GitHub discussions

Well, I lied. Google gets a stay. We ended up with a couple more issues to sort out today. So,

Mar 20

Marion, Kevin McGrattan2

Mar 20

Grid Sensitivity E_COEFFICIENT

There is only one set of validation experiments in the FDS Validation Guide that invoke E_COEFFICIENT

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Grid Sensitivity E_COEFFICIENT

There is only one set of validation experiments in the FDS Validation Guide that invoke E_COEFFICIENT

Mar 20

Fraser Munnoch, Kevin McGrattan5

Mar 20

Unexpected High Negative Pressure

There appears to be a problem where the merging of pressure zones is not working right. This might

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Unexpected High Negative Pressure

There appears to be a problem where the merging of pressure zones is not working right. This might

Mar 20

Firas Shawash, dr_jfloyd2

Mar 19

Beta versions of an FDS

Only those feature specifically noted as beta features are in beta testing (GEOM, 3D heat transfer,

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Beta versions of an FDS

Only those feature specifically noted as beta features are in beta testing (GEOM, 3D heat transfer,

Mar 19

Hosein Sadeghi, dr_jfloyd4

Mar 19

Problem with VEL_PART

Setting a small drag coefficent will decouple particles from the gas flow, but in that case not sure

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Problem with VEL_PART

Setting a small drag coefficent will decouple particles from the gas flow, but in that case not sure

Mar 19

Sal Marsico, dr_jfloyd2

Mar 19

CTRL TIME DELAY MONITOR

I think your easy options are: 1) Use the worst case time for all heads. The fire code limits

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CTRL TIME DELAY MONITOR

I think your easy options are: 1) Use the worst case time for all heads. The fire code limits

Mar 19

yiqi CHENG, … Kevin McGrattan3

Mar 19

Setting the solid point will report an error

Probably because the device is near a corner of the obstruction and FDS cannot determine where to

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Setting the solid point will report an error

Probably because the device is near a corner of the obstruction and FDS cannot determine where to

Mar 19

M.J, … Randy McDermott4

Mar 19

Error: Species definition not provided

To Ed's point, if it were me, I would do a very simple test case with PENTANE (C5) as my fuel to

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Error: Species definition not provided

To Ed's point, if it were me, I would do a very simple test case with PENTANE (C5) as my fuel to

Mar 19

Vašek Kobilík, dr_jfloyd3

Mar 18

REAC_FUEL and visibility in Pyrosim viewer

Thank you! Yes the SOOT_YIELD was defined as 0.008 Dne pondělí 18. března 2024 v 21:40:52 UTC+1

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REAC_FUEL and visibility in Pyrosim viewer

Thank you! Yes the SOOT_YIELD was defined as 0.008 Dne pondělí 18. března 2024 v 21:40:52 UTC+1

Mar 18

GGfire, … Tim O'Brien12

Mar 18

tenability and choice of the device

See Dr Floyd's early comment. FED thermal at the point of maximum received radiation flux (in the

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tenability and choice of the device

See Dr Floyd's early comment. FED thermal at the point of maximum received radiation flux (in the

Mar 18

Bastian Stahra, … Kevin McGrattan22

Mar 18

Numerical Instability with Burn-Away Features in FDS

There is a parameter called MINIMUM_LAYER_THICKNESS on the SURF line that defines the thickness of

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Numerical Instability with Burn-Away Features in FDS

There is a parameter called MINIMUM_LAYER_THICKNESS on the SURF line that defines the thickness of

Mar 18

GAM, … Kevin McGrattan3

Mar 18

Smoke for ventilated corridor

Create a very simple test case where the only difference is the size of the compartment. Remove all

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Smoke for ventilated corridor

Create a very simple test case where the only difference is the size of the compartment. Remove all

Mar 18

Tianzheng Sun, … dr_jfloyd6

Mar 17

Run smokeview

Also you probably want to build the non-debug version and run that. Debug is useful for finding bugs

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Run smokeview

Also you probably want to build the non-debug version and run that. Debug is useful for finding bugs

Mar 17

Sigurður Bjarni Gíslason, … Kevin McGrattan4

Mar 14

Validation cases for active electrical cables as heat source

Hi Jason Floyd and Kevin McGrattan, Thank you for your responses. Yes to Jason Floyd, and I saw the

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Validation cases for active electrical cables as heat source

Hi Jason Floyd and Kevin McGrattan, Thank you for your responses. Yes to Jason Floyd, and I saw the

Mar 14

AMAN YADAV, Kevin McGrattan4

Mar 14

Minimum density error

This might have to do with your specific operating system. FDS outputs computed information into a

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Minimum density error

This might have to do with your specific operating system. FDS outputs computed information into a

Mar 14

Heidy Fajardo, dr_jfloyd5

Mar 14

Issue running Complex Stoichiometry -

Thank you ! I modified the values and I took the enthalpy of formation of Dodecane. Le jeudi 14 mars

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Issue running Complex Stoichiometry -

Thank you ! I modified the values and I took the enthalpy of formation of Dodecane. Le jeudi 14 mars

Mar 14

rodrigo.alm...@gmail.com

Mar 13

Solar panels

Hello, has anyone worked on computer simulation of fire in solar panels? Or involving these materials

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Solar panels

Hello, has anyone worked on computer simulation of fire in solar panels? Or involving these materials

Mar 13

Neeraj Chaudhary, … Kevin McGrattan6

Mar 13

fds job issue on hpc with

Your input file has only one MESH, but you are trying to run the job using two MPI processes. I am

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fds job issue on hpc with

Your input file has only one MESH, but you are trying to run the job using two MPI processes. I am

Mar 13

Muneeb Khalid, … dr_jfloyd8

Mar 13

Minimum density - Clipped in Mesh 1 error

yes, i understood my mistake now. Although, to be clear, only 6 fans activate, remaining 6 do not

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Minimum density - Clipped in Mesh 1 error

yes, i understood my mistake now. Although, to be clear, only 6 fans activate, remaining 6 do not

Mar 13

Hosein Sadeghi, Kevin McGrattan3

Mar 12

Ramped specific heat for solid materials

thank you. On Tuesday, March 12, 2024 at 8:31:25 PM UTC Kevin McGrattan wrote: SPECIFIC_HEAT_RAMP

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Ramped specific heat for solid materials

thank you. On Tuesday, March 12, 2024 at 8:31:25 PM UTC Kevin McGrattan wrote: SPECIFIC_HEAT_RAMP

Mar 12

Dylan B., Kevin McGrattan5

Mar 12

Question about PATH_LENGTH

Thank you ! Its clearer to me now. Le mardi 12 mars 2024 à 16:12:18 UTC+1, Kevin McGrattan a écrit :

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Question about PATH_LENGTH

Thank you ! Its clearer to me now. Le mardi 12 mars 2024 à 16:12:18 UTC+1, Kevin McGrattan a écrit :

Mar 12

Juan Pedro Carbonell, Kevin McGrattan4

Mar 11

Problem testing mpiexec (execution works in just one computer)

This is from the Intel guide. Try the second suggested Troubleshooting method, for example mpiexec ..

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Problem testing mpiexec (execution works in just one computer)

This is from the Intel guide. Try the second suggested Troubleshooting method, for example mpiexec ..

Mar 11

shiyi....@gmail.com, … David Sheppard6

Mar 11

Fitting the HRR curve

The shape of the heat release curve also does not seem correct for a sofa. I would expect a curve

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Fitting the HRR curve

The shape of the heat release curve also does not seem correct for a sofa. I would expect a curve

Mar 11

AMAN YADAV, … dr_jfloyd12

Mar 9

FIRE MODEL in tunnel

Have you looked at the User's Guide section on Tunnels? If you are already following the advice

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FIRE MODEL in tunnel

Have you looked at the User's Guide section on Tunnels? If you are already following the advice

Mar 9

Jonas, … Randy McDermott5

Mar 9

Smoke movement

Latest source? I think we have fixed issues with transport across mesh boundaries recently.

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Smoke movement

Latest source? I think we have fixed issues with transport across mesh boundaries recently.

Mar 9

shiyi....@gmail.com, fde3

Mar 8

Simulate a flame behavior after the sprinkler system has been activated

Thank you sir. I really appreciate your advice! fde <yilmaz....@gmail.com> 于2024年3月8日周五 20:

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Simulate a flame behavior after the sprinkler system has been activated

Thank you sir. I really appreciate your advice! fde <yilmaz....@gmail.com> 于2024年3月8日周五 20:

Mar 8