Dittus Boelter coefficient M range

[Martin Beer]

Hello, I am doing Dittus Boelter correlation for Nusselt number accroding to my measured data. Coefficient (or constant) M that is related to Re has (in my case) value of 1.12. Is it physically possible to get value greater than 1? In my previous research, I've only met with a value of less than one, so I am little bit confused. Thanks for answer.

 

[Chestermiller]

Hello, I am doing Dittus Boelter correlation for Nusselt number accroding to my measured data. Coefficient (or constant) M that is related to Re has (in my case) value of 1.12. Is it physically possible to get value greater than 1? In my previous research, I've only met with a value of less than one, so I am little bit confused. Thanks for answer.

In my judgment, it is conceptually possible to get an exponent greater than 1. In practice, as you know, there is abundant data that indicates that it is about 0.8.

 

[Martin Beer]

Thank you for your answer, I really appreciate it. Could you recommend some suitable literature for me to learn more about it?

 

[Chestermiller]

Thank you for your answer, I really appreciate it. Could you recommend some suitable literature for me to learn more about it?

Bird, Stewart, and Lightfoot, Transport Phenomena.