HT 9.5 Nusselt Number Correlations for Internal Flow
Channel: Sunthar's Lectures in Chemical Engineering
Date: 2021-03-17

Nu correlations for internal flows other than laminar pipe flow.

* Dittus-Bolter and Sider-Tate for turbulent flows
* Hydraulic diameters for non-circular cross-sections
* Microchannels are laminar but have lower Nu when mean free path becomes comparable to the length scales of flow
* Heat transfer can be enhanced by optimising Nu or by having modifications to the geometry inside a pipe (Tubular inserts, Twisted tape, Internal fins, Ribbed surface are some such variations)

Lectures delivered in IIT Bombay, Department of Chemical Engineering
CL246 2020-2 (or Jan 2021)
Lecture slides can be viewed/downloaded from here:
https://drive.google.com/drive/folders/1PORgru2SAh1sODLMKXh9wZTEY8HMvhQk


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