Hi, is there anyone have experiences using DARS with StarCD to simulate the reaction inside the catalyst. I use porous media as the representation of the catalyst, is it possible to combine the reaction kinetics from dars inside the porous media? How to define different reaction in different cells, like reaction (A) in fluid, and reaction (B) in the porous media?

Thanks

Hi Sakti,

DARS is implemented in STAR-CCM+ which is also a really good tool for porous media. I think DARS has surface chemistry. You should visit for more information:

http://www.diganars.com/about.html

good luck

Hi Paolo,

Thank you for you reply, So you mean that I should use STAR-CCM+ instead if STARCD?

I read in the STAR-CCM+ its only have homogeneous reactor model for using DARS, and in case of STARCD, I read in the supplementary notes, that the surface chemistry is only for wall and baffle, thats why I wondering, can I use porous media as a representation of catalyst and include the chemistry reaction in it?.

Thanks again for your guidances

Hi

For the design of catalysts I advise you to look for defining Biot number and Thiele modulus as user defined field functions and also to use DARS-CFD for STAR-CCM

some relevant links:

www.rpi.edu/dept/chem-eng/Biotech-Environ/Projects00/masstrans/int_mt_main.htm

jbrwww.che.wisc.edu/home/jbraw/chemreacfun/figures.html jbrwww.che.wisc.edu/home/jbraw/chemreacfun/ch7/figures/etanolog.html jbrwww.che.wisc.edu/home/jbraw/chemreacfun/ch7/figures/etasymmetric.html jbrwww.che.wisc.edu/home/jbraw/chemreacfun/ch7/figures/etahougwat.html jbrwww.che.wisc.edu/home/jbraw/chemreacfun/ch7/figures/biotcvsr.html

www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFT-48JSHP5-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view =c&_acct=C000050221&_version=1&_urlVersion=0&_user id=10&md5=dad17e74bcc9ab1d5b62b901518e6174 espace.library.uq.edu.au/view/UQ:23846

It is also used in Biochemical applications:

www.engin.umich.edu/~cre/course/lectures/twelve/exam2.htm

Hi, Many thanks for the advice, I will try to study it first, and later maybe we can discuss again.

Thanks a lot

Hi, I have used STARCD 3.27 version with DARS and DARS-CFD. If you want to calculate different reactions on different areas,you should have mechanism such that each reaction in mechanism is seperate. While exporting fortran files from DARS to STARCD, you will get EXTENDED data which contains all the inputs needed for STARCD from DARS. This extended data includes details like on which surface which reaction has to take place and what are the species invloved like that. If you can edit this extended data you can find the options needed for you. I hope it may help you.

Dear Premchand,

Thank you also for you information, this is very helpful.

regards Byan

3.27 is no longer supported