Analytic prediction of the friction factor for turbulent flow in internally finned channels

Journal Article · Sat Aug 01 04:00:00 EDT 1981 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3244480· OSTI ID:6069289

Scott, M J; Webb, R L

This work developed an analytical model for the friction factor with turbulent flow in internally finned channels. Such channels are an important class of enhanced heat transfer surfaces. Until this work, no analytical models for the turbulent friction factor have been proposed. The present model assumes the validity of the Law of the Wall and applies the logarithmic velocity distribution to the interfin and core regions of the flaw. Theoretically based friction factor equations are developed for internally finned circular tubes and rectangular channels. The model predicts Carnavos data for 21 internally finned tubes with +- 10 percent. Friction factor data were taken for five internally finned, rectangular channels. The analytical model predicts these data within +- 10 percent, except for the case of a very high fin.

• Research Organization: Detroit Diesel Allison, Detroit, Michigan
• OSTI ID: 6069289
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 103:3; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CIRCULAR CONFIGURATION
CONFIGURATION
ENERGY TRANSFER
FLUID FLOW
FRICTION FACTOR
HEAT TRANSFER
MATHEMATICAL MODELS
RECTANGULAR CONFIGURATION
TUBES
TURBULENT FLOW