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UDF for using reduced reaction mechanism (ckwyp)

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Old   August 30, 2012, 05:52
Post UDF for using reduced reaction mechanism (ckwyp)
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vnm
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I am modeling methane combustion with air. I am using GRI 1.2 reaction mechanism for the same. Some reduced reaction mechanisms are available i.e at http://www.engr.uconn.edu/~tlu/mechs/mechs.htm. and at http://www.princeton.edu/~cklaw/kine...tep/index.html., All these reduced reaction mechanism has a ckwyp subroutine which is written in Fortran language. This can be converted into an .obj file using a fortran compiler. I do not know how to incorporate this ckwyp subroutine in Fluent. Please help
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Old   August 30, 2012, 11:13
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Jared Brewer
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Fluent does not have the capabilites to read mechanisms like that. You must install the CHEMKIN component which will process your reduced mechanism for each iteration. Fluent will the read the data that CHEMKIN produces and apply it to your model.
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Old   August 31, 2012, 01:03
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Fluent can read precompiled objects such as .obj file. (page page 5-18 of UDF manual http://hpce.iitm.ac.in/website/Manua.../udf/chp05.pdf
Is there a UDF to call ckwyp.obj to Fluent?
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Old   September 10, 2019, 10:12
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Hi, did you find the answer for your question?


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Originally Posted by vnm View Post
I am modeling methane combustion with air. I am using GRI 1.2 reaction mechanism for the same. Some reduced reaction mechanisms are available i.e at http://www.engr.uconn.edu/~tlu/mechs/mechs.htm. and at http://www.princeton.edu/~cklaw/kine...tep/index.html., All these reduced reaction mechanism has a ckwyp subroutine which is written in Fortran language. This can be converted into an .obj file using a fortran compiler. I do not know how to incorporate this ckwyp subroutine in Fluent. Please help
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Old   September 12, 2019, 15:44
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Hi Roil, if you can find the answer that was given to vnm directly below his/her question. If you have trouble finding it, press ctrl-F and type "Jinglz", your browser should then highlight some text; look to the right and you'll see the answer. I see that you were able to "like" that answer, but apparently you forgot to read it.
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Old   September 15, 2019, 16:12
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Hi Pakk. Thank you for your reply. I read those answers. I do not know how far they are reliable and whether there is someone who tried them before. Plus, I do not know which Chemkin file Fluent is using for processing the chemical reactions.


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Hi Roil, if you can find the answer that was given to vnm directly below his/her question. If you have trouble finding it, press ctrl-F and type "Jinglz", your browser should then highlight some text; look to the right and you'll see the answer. I see that you were able to "like" that answer, but apparently you forgot to read it.
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ckwyp, combustion modelling, methane, reaction mechanism

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