Hi,
just tried the ecotect demo, and very pleased with it. I'm thinking of purchasing the student version eventually.
However, when it comes to ventilation and air flow, things gets a little more complicated.
I downloaded the necessary NIST FDS but could make no sense of it as it seems to lack a GUI.
Is anyone familiar with this method, as anyone wanting to make use of the ability to visualise air currents must have gone down this path, but it's a little beyond me,
Thanks
architecture, sustainability, building performance, environmental design, architectural science...
NIST FDS walkthrough?
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NIST FDS
Hello Eamon,
Sigh. The NIST is something I have meant to get going on a while ago.
I have downloaded the software and read the instructions, but like you, I got stuck trying to figure out how to export my analysis grid to it.
If I understood correctly - and it has been a while - it works a bit like with Radiance where you export your analysis grid from Ecotect, run the calc, then re-import the results in Ecotect.
I am hoping soon there will be a "How to..." topic on this, just like the one with the export/import to Radiance. Who knows, maybe there will also be a new dedicated control panel?
I'll have to investiguate further whenever I can find the time!!
Olivier
Thanks for the reply
Thanks for the reply Olivier - I won't have too much time to look into it for the next few months at least - but I did discover one thing about fds - there's a fds4.exe which opens a command prompt window to run a calculation.
However, anything entered into this doesn't seem to work, until I tried to open a command prompt window from the windows start menu which worked better. Also, there's a readme in the installed documents which is pretty self explanatory.
Still haven't managed to complete a successful round trip from ecotect and back however
Eamon
you can import dxf file
you can import dxf file using DXF2FDS tool, and then you need edit the mesh and boundry conditions of the input file, the syntax is not very difficult.
i have calculated some models, but the result of fds(using LES) is different from Fluent(using k-e), i do not know why.
Yunpeng, Did you import
Yunpeng,
Did you import your cfd data into ecotect to visualize it? If not what program are you using to visualize the data? I am trying to use nist fds to do some simple airflow analysis but am not successful in exporting my model or importing the data back into ecotect. If it is possible to create images like the one you showed in nist fds then I would be happy with that. Any guidelines that you have to offer would be greatly appreciated.
Chris
hello christopher i can
hello christopher
i can not export fds result to ecotect,too. now i`m using TECPLOT to view the fds result. To exporting result of fds to TECPLOT, you must plus a sentence exporting plot3d (for example: &PL3D QUANTITIES='PRESSURE', 'VELOCITY', 'TEMPERATURE' WRITE_XYZ=.TRUE./).
After calculation, you will find *.xyz(plot3d grid file) and *.q(plot3d result file),this is the only way exporting result from fds. in tecplot,you can import file using plot3d loader, selecting .xyz and .q file, that`s all.
yunpeng
thanks yunpeng, this is
thanks yunpeng,
this is very helpful. i have one last question. are you modeling in ecotect and exporting to nst fds? or are you modeling in nst fds? If you are modeling in ecotect what is your method of exporting to nst fds? thanks for all of your help.
chris
Explain a bit more please...
yunpeng,
Would you please explain a bit more how to make the .xyz file. Where we have to add the (&PL3D QUANTITIES='PRESSURE', 'VELOCITY', 'TEMPERATURE' WRITE_XYZ=.TRUE./)?
another problem is the number of *.q files. There are 5 files after the itteration, and how could we know which one is the very one?
Thanks,
Mostapha
Hi You can insert the
Hi
You can insert the sentence to the input file in anywhere.
As FDS can only simulate unsteady conditions, so the different .q files are related to the different time. In common conditons, you should choose the latest one.
how adequate is FDS?
Hey Everyone!
I visited the FDS-website to download the program and get started with simulating airflow.
I tried to find some comment on how suitable the program is for building design other than fire protection but all I could find - in various places - is
"Fire Dynamics Simulator (FDS) is a computational fluid dynamics (CFD) model of fire-driven fluid flow. The software solves numerically a form of the Navier-Stokes equations appropriate for low-speed, thermally-driven flow, with an emphasis on smoke and heat transport from fires"
As I'm not that used to CFD yet I'm wondering whether the program is also suitable for things like comfort, energy performance, thermal simulations, ... or "just" for thermally-driven flow in case of a fire. Might sound stupid to more experienced users but can anybody tell whether it works well and how it deals with wind data?
Cheers,
Thomas