Computation of the Nusselt number asymptotes for laminar forced convection flows in internally finned tubes

Journal Article · Thu Apr 01 04:00:00 EST 1999 · International Communications in Heat and Mass Transfer

DOI:https://doi.org/10.1016/S0735-1933(99)00026-3· OSTI ID:343668

Ledezma, G A ^[1]; Campo, A ^[2]

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1. Duke Univ., Durham, NC (United States). Mechanical Engineering Dept.
2. Idaho State Univ., Pocatello, ID (United States). Coll. of Engineering

The utilization of internal longitudinal finned tubes has received unparallel attention in the heat transfer literature over the years as a result of its imminent application in high performance compact heat exchangers to enhance the heat transfer between laminar streams of viscous fluids and tube walls. Here, the central goal of this paper is to report a simple approximate way for the prediction of the two asymptotes for the local Nusselt number in laminar forced convection flows inside internal longitudinal finned tubes. The computational attributes of the Method Of Lines (MOL) are propitious for the determination of asymptotic temperature solutions and corresponding heat transfer rates (one for Z {r_arrow} 0 and the other for z {r_arrow} {infinity}). The two local Nusselt number sub-distributions, namely Nu{sub z{r_arrow}0} and Nu{sub z{r_arrow}{infinity}}, blend themselves into an approximate Nusselt number distribution that covers the entire z-domain in a natural way.

• OSTI ID: 343668
• Journal Information: International Communications in Heat and Mass Transfer, Journal Name: International Communications in Heat and Mass Transfer Journal Issue: 3 Vol. 26; ISSN 0735-1933; ISSN IHMTDL
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
AUGMENTATION
FINS
FORCED CONVECTION
HEAT EXCHANGERS
LAMINAR FLOW
NUSSELT NUMBER