The Dittus-Boelter correlation for Nusselt number can yield a coefficient M related to Reynolds number (Re) that exceeds 1, as evidenced by a reported value of 1.12 in a recent discussion. While it is conceptually possible to achieve an M value greater than 1, empirical data predominantly suggests values around 0.8. This discrepancy raises questions about the physical implications of such coefficients in heat transfer applications. Recommended literature for further exploration includes "Transport Phenomena" by Bird, Stewart, and Lightfoot.
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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?