# temperature profile on boundary

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 November 18, 2002, 12:30 temperature profile on boundary #1 sivakumar Guest   Posts: n/a Hi all, I am having a problem with imposing a varying temperature profile on wall(2d pipe flow).The profile is wall is 153 cm long with temperature going from 900 - 1400k in 0 - 18 cm(linearly) constant at 1400k in 18 - 44cm 1400 - 700k in 44 - 60 cm(linearly) constant at 700k in 60 - 153cm I try to put this by splitting the wall into 4 different zones. The resulting temperature profile in the reactor matches the wall profile except for the first zone, where the temperature is limited to 1 k by fluent. Can anybody give me some ideas to overcome this. I would really apprecate the help. thanks in advance, sivakumar

 November 18, 2002, 20:35 Re: temperature profile on boundary #2 zhhuang Guest   Posts: n/a Did you read the UDF help?you can solve it by the help of UDF

 November 19, 2002, 01:21 Re: temperature profile on boundary #3 sivakumar Guest   Posts: n/a hi zhhuang, can you be more specific please. iam using udf to introduce the linear profiles, while i suggest constant temperature on the other two zones. thank you, sivakumar

 November 19, 2002, 02:22 Re: temperature profile on boundary #4 zhhuang Guest   Posts: n/a I believe you can find the details in the UDF manul

 November 19, 2002, 06:14 Re: temperature profile on boundary #5 Rahul Hiwale Guest   Posts: n/a Hi I believe you need not to split in single UDF itself you can give temp profile. As your model is 2 D problem is again simple. assume your wall start at origin and paralel to one axis. Follow this step in UDF 1. Read location of each thread .(loc) 2 Compare it with your controling location a .if it less than 18 then temp will be 900 + 500*loc/18 simlarly you can specify temp for other locations. If you need more help reply Rahul

 November 24, 2002, 00:58 Re: temperature profile on boundary #6 mahdi saniee nezhad Guest   Posts: n/a Dear sir I have a problem with this title. If it's possible for you please send me your received responses. Very thanks for your attention to my request. With the best regards. Mahdi saniee nezhad