I have made a new custom air mix in the Lumped Species menu. When I look at the model record, you can see on the last line that PyroSim has deemed this lumped species a LUMPED_COMPONENT_ONLY. There is no menu option in the Lumped Species menu to disable this. The air species is not a lumped component, it is itself a lumped species. This is problematic because you cannot define a LUMPED_COMPONENT_ONLY species to be the background gas. The only way around this that I have found is to cut and paste the entire record into the "additional records" tab.
Am I doing something wrong? Is there a way to get around this? It makes it a big hassle to do complex reactions in pyrosim.
Thanks for the follow up and meeting online to dig in a bit to the issue.
As we discussed, the easier workaround is to click on any species that has the LUMPED_COMPONENT_ONLY option set to AUTO or FALSE, and then click back into your Lumped species and make any changes to clear the parameter from that species.
If you click on a species where LUMPED_COMPONENT_ONLY is TRUE and then click on a Lumped species, any edits will add in that parameter to the input text.
We should have this bug smashed in the next release.
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Bryan Kleinposted
25 days ago
AdminAnswer
Thanks for the follow up and meeting online to dig in a bit to the issue.
As we discussed, the easier workaround is to click on any species that has the LUMPED_COMPONENT_ONLY option set to AUTO or FALSE, and then click back into your Lumped species and make any changes to clear the parameter from that species.
If you click on a species where LUMPED_COMPONENT_ONLY is TRUE and then click on a Lumped species, any edits will add in that parameter to the input text.
We should have this bug smashed in the next release.
0 Votes
K
Kate Pinkertonposted
25 days ago
Hi Bryan,
I tried your workaround and it works initially to make the species without the lumped component marker. But as soon as I edit it at all (add components, change it to composition by volume, any edit to the species really) the lumped component marker comes back. Am I just doing it wrong? Or is there a different workaround that you can find?
Thanks,
Kate
1 Votes
Bryan Kleinposted
25 days ago
Admin
Hello Kate, thank you for the question as you have discovered a bug in the PyroSim UI that I was able to reproduce.
The bug has to do with marking a Primitive species as LUMPED_COMPONENT_ONLY=.TRUE. and then creating a new Lumped Species after that.
The setting of LUMPED_COMPONENT_ONLY=.TRUE. is persisted in the UI and is added (incorrectly) to the new Lumped Species.
Fortunately, it seems there is a workaround, which is to Click 'Ok' on the Edit Species dialog window and close it before creating the new Lumped species.
This is to clear that incorrect state from the UI and get the expected results.
I would delete your custom AIR species and try again after Clicking OK to clear the dialog state.
Two other suggestions for your work with Species.
1) Use a custom name for your custom air species. Using 'AIR' might cause some issues since this is a known default species in FDS. Something cool like 'atmosphere' or 'custom air', might make things a bit more clear to FDS and others who might look at your input in the future.
2) Make sure that the Volume Fractions of your Lumped species components add up to 1.0. These values are fractions of the total for that species and should add up to comprise 100% (1.0) of the volume.
I hope all of this helps you get back to work and get the job done without using any advanced records.
Please let us know if this workaround doesn't solve the issue for you.
I have made a new custom air mix in the Lumped Species menu. When I look at the model record, you can see on the last line that PyroSim has deemed this lumped species a LUMPED_COMPONENT_ONLY. There is no menu option in the Lumped Species menu to disable this. The air species is not a lumped component, it is itself a lumped species. This is problematic because you cannot define a LUMPED_COMPONENT_ONLY species to be the background gas. The only way around this that I have found is to cut and paste the entire record into the "additional records" tab.
Am I doing something wrong? Is there a way to get around this? It makes it a big hassle to do complex reactions in pyrosim.
&SPEC ID='WATER VAPOR'/
&SPEC ID='ARGON', LUMPED_COMPONENT_ONLY=.TRUE./
&SPEC ID='NITROGEN', LUMPED_COMPONENT_ONLY=.TRUE./
&SPEC ID='OXYGEN', LUMPED_COMPONENT_ONLY=.TRUE./
&SPEC ID='CARBON DIOXIDE', LUMPED_COMPONENT_ONLY=.TRUE./
&SPEC ID='AIR', BACKGROUND=.TRUE.,
SPEC_ID(1)='ARGON',
SPEC_ID(2)='CARBON DIOXIDE',
SPEC_ID(3)='NITROGEN',
SPEC_ID(4)='OXYGEN',
SPEC_ID(5)='WATER VAPOR',
VOLUME_FRACTION(1)=0.93,
VOLUME_FRACTION(2)=0.04,
VOLUME_FRACTION(3)=78.08,
VOLUME_FRACTION(4)=20.95,
VOLUME_FRACTION(5)=0.7, LUMPED_COMPONENT_ONLY=.TRUE./
0 Votes
Bryan Klein posted 25 days ago Admin Best Answer
Thanks for the follow up and meeting online to dig in a bit to the issue.
As we discussed, the easier workaround is to click on any species that has the LUMPED_COMPONENT_ONLY option set to AUTO or FALSE, and then click back into your Lumped species and make any changes to clear the parameter from that species.
If you click on a species where LUMPED_COMPONENT_ONLY is TRUE and then click on a Lumped species, any edits will add in that parameter to the input text.
We should have this bug smashed in the next release.
0 Votes
3 Comments
Bryan Klein posted 25 days ago Admin Answer
Thanks for the follow up and meeting online to dig in a bit to the issue.
As we discussed, the easier workaround is to click on any species that has the LUMPED_COMPONENT_ONLY option set to AUTO or FALSE, and then click back into your Lumped species and make any changes to clear the parameter from that species.
If you click on a species where LUMPED_COMPONENT_ONLY is TRUE and then click on a Lumped species, any edits will add in that parameter to the input text.
We should have this bug smashed in the next release.
0 Votes
Kate Pinkerton posted 25 days ago
Hi Bryan,
I tried your workaround and it works initially to make the species without the lumped component marker. But as soon as I edit it at all (add components, change it to composition by volume, any edit to the species really) the lumped component marker comes back. Am I just doing it wrong? Or is there a different workaround that you can find?
Thanks,
Kate
1 Votes
Bryan Klein posted 25 days ago Admin
Hello Kate, thank you for the question as you have discovered a bug in the PyroSim UI that I was able to reproduce.
The bug has to do with marking a Primitive species as LUMPED_COMPONENT_ONLY=.TRUE. and then creating a new Lumped Species after that.
The setting of LUMPED_COMPONENT_ONLY=.TRUE. is persisted in the UI and is added (incorrectly) to the new Lumped Species.
Fortunately, it seems there is a workaround, which is to Click 'Ok' on the Edit Species dialog window and close it before creating the new Lumped species.
This is to clear that incorrect state from the UI and get the expected results.
I would delete your custom AIR species and try again after Clicking OK to clear the dialog state.
Two other suggestions for your work with Species.
1) Use a custom name for your custom air species. Using 'AIR' might cause some issues since this is a known default species in FDS. Something cool like 'atmosphere' or 'custom air', might make things a bit more clear to FDS and others who might look at your input in the future.
2) Make sure that the Volume Fractions of your Lumped species components add up to 1.0. These values are fractions of the total for that species and should add up to comprise 100% (1.0) of the volume.
I hope all of this helps you get back to work and get the job done without using any advanced records.
Please let us know if this workaround doesn't solve the issue for you.
0 Votes
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