[Commercial meshers] Why is there no option to importexport binary fluent files to OF

bastil · January 18, 2009, 14:41

Always saving these files as ASCII is annoying and uses lots of memory for large models. Are there planes to add binary support?

BastiL

hjasak · January 18, 2009, 15:55

The beauty of open source is that you can write it yourself, right?

Hrv

bastil · January 18, 2009, 18:40

..at least if I am able to do... ;-)

hjasak · January 19, 2009, 09:57

Here's some advice (this is how I would do it if I had to do it again - my first go with flex is not too impressive).

Fluent uses a well-structured language for its input-output: it is called Schemeand it corresponds to Lisp syntax. My advice would be to load Fluent files into a public domain version of Scheme interpreter (which will also take care of binary/ascii, I think) and then query the Scheme database for the components you need. Extracting the data needed to build the mesh is identical to existing converters, so you will be able to copy that.

Good luck, please keep me posted on the progress,

Hrv

bastil · January 19, 2009, 15:25

Thanks Hrv,

I have done some scripting in scheme and some parsing of FLUENT-Files in Python. However, interpreting of binary data is totally new to me. I have guile availabe and can read the mesh into there but do not know how to do this from of c++ and how to "search the database". I will start taking a look at the existing code.

BastiL

bastil · January 27, 2009, 11:50

After consideration I tried to extend the existing code. Maybe this is not the best but for me fastest way to try first.

Regards BastiL

bastil · February 17, 2009, 14:37

Ok...
I see the problems with flex in combination with binary files. I will consider alternatives. Doing it in Scheme as proposed by Hrv would mean integration of some Scheme code. I will consider.

Regards

January 18, 2009, 14:41	Why is there no option to importexport binary fluent files to OF	#1
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	Always saving these files as ASCII is annoying and uses lots of memory for large models. Are there planes to add binary support? BastiL

January 18, 2009, 15:55	The beauty of open source is t	#2
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,907 Rep Power: 33	The beauty of open source is that you can write it yourself, right? Hrv __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

January 18, 2009, 18:40	..at least if I am able to do.	#3
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	..at least if I am able to do... ;-)

January 19, 2009, 09:57	Here's some advice (this is ho	#4
hjasak Senior Member Hrvoje Jasak Join Date: Mar 2009 Location: London, England Posts: 1,907 Rep Power: 33	Here's some advice (this is how I would do it if I had to do it again - my first go with flex is not too impressive). Fluent uses a well-structured language for its input-output: it is called Schemeand it corresponds to Lisp syntax. My advice would be to load Fluent files into a public domain version of Scheme interpreter (which will also take care of binary/ascii, I think) and then query the Scheme database for the components you need. Extracting the data needed to build the mesh is identical to existing converters, so you will be able to copy that. Good luck, please keep me posted on the progress, Hrv __________________ Hrvoje Jasak Providing commercial FOAM/OpenFOAM and CFD Consulting: http://wikki.co.uk

January 19, 2009, 15:25	Thanks Hrv, I have done som	#5
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	Thanks Hrv, I have done some scripting in scheme and some parsing of FLUENT-Files in Python. However, interpreting of binary data is totally new to me. I have guile availabe and can read the mesh into there but do not know how to do this from of c++ and how to "search the database". I will start taking a look at the existing code. BastiL

January 27, 2009, 11:50	After consideration I tried to	#6
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	After consideration I tried to extend the existing code. Maybe this is not the best but for me fastest way to try first. Regards BastiL

February 17, 2009, 14:37	Ok... I see the problems with	#7
bastil Senior Member BastiL Join Date: Mar 2009 Posts: 530 Rep Power: 20	Ok... I see the problems with flex in combination with binary files. I will consider alternatives. Doing it in Scheme as proposed by Hrv would mean integration of some Scheme code. I will consider. Regards

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