The discussion revolves around the Dittus Boelter correlation for Nusselt number, specifically focusing on the coefficient M related to Reynolds number (Re). Participants explore the physical implications of obtaining a value greater than 1 for this coefficient based on measured data.
There is no consensus on the physical validity of a coefficient M greater than 1, as participants present differing views on its feasibility based on empirical data.
The discussion does not resolve the assumptions regarding the conditions under which the Dittus Boelter correlation applies or the specific contexts of the measured data.
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 said: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.
Bird, Stewart, and Lightfoot, Transport Phenomena.Martin Beer said:Thank you for your answer, I really appreciate it. Could you recommend some suitable literature for me to learn more about it?