Irreversibility extrema in laminar flow through unfinned and finned ducts

Dusan Sekulic, Antonio Campo, Juan C. Morales

Research output: Contribution to conferencePaperpeer-review

Abstract

The main objective of this study is to consider the existence of a thermodynamic irreversibility extrema for fully developed laminar heat transfer and fluid flow through different cross-sectional, free-flow area ducts. The evaluation of thermodynamic trade-offs caused by simultaneous heat transfer at a finite temperature difference, and by fluid friction will be emphasized in terms of the dimensionless entropy generation as a performance criterion. A set of duct geometries under investigation included circular, rectangular, square, triangular, sine, and finned circular ducts. The pragmatical goal of the analysis is to establish the mutual relationship between the results using either the conventional area goodness factor, or the thermodynamic performance evaluation criterion. The computed results show that performance criteria may contradict each other. The quantitative results for the set of parameters under investigation show that the improvement and/or deterioration of the performance of one geometry in respect to the other depend on Reynolds number and inlet temperature ratio for a given fluid and fluid flow length.

Original languageEnglish
Pages1-9
Number of pages9
StatePublished - 1994
EventProceedings of the 1994 International Mechanical Engineering Congress & Exhibition, of the Winter Annual Meeting - Chicago, IL, USA
Duration: Nov 6 1994Nov 11 1994

Conference

ConferenceProceedings of the 1994 International Mechanical Engineering Congress & Exhibition, of the Winter Annual Meeting
CityChicago, IL, USA
Period11/6/9411/11/94

ASJC Scopus subject areas

  • Mechanical Engineering

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