Heat Transfer and Pressure Drop Characteristics of a Dimpled Flat Tube

950114

02/01/1995

Event
International Congress & Exposition
Authors Abstract
Content
The fully developed turbulent momentum and heat transfer induced by three-dimensional roughness elements on the inner wall surface in a dimpled tube is studied analytically based on standard k- ε turbulence model with a Navier-Stokes equation solver. Experimental investigations are also carried out to obtain pressure drop characteristics and to verify the numerical results of the fluid flow. The calculated pressure fields exactly predict the friction factor relation obtained from experiment at high Reynolds number cases, ReD > 4,000. The complex velocity distribution taken from analysis also reasonably well agree with experiment. For the range of present Reynolds number, 2,000 < ReD < 10,000, the numerical analysis demonstrates that the heat transfer enhancement decreases with increasing Reynolds number.
Meta TagsDetails
DOI
https://doi.org/10.4271/950114
Pages
11
Citation
Kim, K., Ha, M., Koak, S., Kim, K. et al., "Heat Transfer and Pressure Drop Characteristics of a Dimpled Flat Tube," SAE Technical Paper 950114, 1995, https://doi.org/10.4271/950114.
Additional Details
Publisher
Published
Feb 1, 1995
Product Code
950114
Content Type
Technical Paper
Language
English