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Difference Between UDF and Expressions in Thermal Comfort Evaluation?

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Old   April 29, 2019, 00:37
Question Difference Between UDF and Expressions in Thermal Comfort Evaluation?
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Good day,

I am conducting evaluation of cabin thermal comfort inside passenger bus using PMV equation from ISO 7730 standard. At first I'm gonna use UDF but a friend of mine told me that I can use expressions inside the Fluent post-processing program. However, I'm not sure what are the differences between those two in evaluating thermal comfort. Is it okay if I use expressions instead of UDF? What are the differences between those two?
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Old   April 29, 2019, 04:03
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Alexander
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Fluent post-processing program means post processing
UDF may influence (or may not) solution. If your goal is a combination of variables, which are calculated by default -> you may use expression instead of UDF

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Old   May 11, 2019, 00:05
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Dear AlexanderZ, thank you for the explanation
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Old   March 27, 2020, 16:13
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Hi..


Actually, I too need to work on the similar analysis, (thermal comfort). I got one extension(of thermal comfort) from Ansys website, unfortunately that isn't working out. Can you suggest me about the expression thing.

I'm new to Ansys fluent, unable to catch up..

Any help, I will be really thankful.

Thank you

Cheers Mohammed.
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Old   January 4, 2023, 08:00
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Quote:
Originally Posted by Aven.farhan View Post
Hi..


Actually, I too need to work on the similar analysis, (thermal comfort). I got one extension(of thermal comfort) from Ansys website, unfortunately that isn't working out. Can you suggest me about the expression thing.

I'm new to Ansys fluent, unable to catch up..

Any help, I will be really thankful.

Thank you

Cheers Mohammed.
Dear, what is the name of the extension you found? and did you find a way to implement thermal comfort calculation?
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Old   January 4, 2023, 08:35
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Mohammed Khan
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Hi.

The extension doesn't work.
I finally created custom functions. I investigated PMV, PPD, Pd, Age of Air. All of these using custom functions.
Thanks
Mohammad
Email - aven.farhan@gmail.com
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Old   January 4, 2023, 09:30
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Quote:
Originally Posted by Aven.farhan View Post
Hi.

The extension doesn't work.
I finally created custom functions. I investigated PMV, PPD, Pd, Age of Air. All of these using custom functions.
Thanks
Mohammad
Email - aven.farhan@gmail.com
can you please help me on these
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Old   April 11, 2023, 05:59
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Ho Chi Minh
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Quote:
Originally Posted by Aven.farhan View Post
Hi.

The extension doesn't work.
I finally created custom functions. I investigated PMV, PPD, Pd, Age of Air. All of these using custom functions.
Thanks
Mohammad
Email - aven.farhan@gmail.com
Could you please help me on this thing? I have a research of evaluating PMV of a room on Ansys. I sent you an email asking for help.
ldhuy.simeon@gmail.com
Thank you.
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expressions, pmv index, post-processing, thermal comfort, udf

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