Flow regime determination for finned heat exchanger surfaces with dimples/protrusions

Ephraim M Sparrow, John M Gorman, Kyle S. Friend, John P. Abraham

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

There are many modalities that may be used to enhance heat transfer performance. One of these modes, the embossing of channel walls with dimples and/or protrusions, is a technique which has the advantage of simplicity of fabrication. The assessment of the quality of a geometry-based heat transfer enhancement technique frequently involves the change in pressure drop that accompanies the geometric modification. This realization provides the motivation for the investigation reported here. The focus of this work is the identification of the existence of various sub-regimes within the laminar-flow regime. The investigation was implemented by numerical simulation supplemented by a three-dimensional model of periodic fully developed flow. The selected channel-height Reynolds number range extended from 200 to 800. Within this range, three sub-regime laminar flows were identified: friction-dominated flow, inertial-loss-dominated flow, and the transition between these flows. Another focus of the results was the presentation of patterns of fluid flow and their impacts on the variation of the pressure drop with Reynolds number.

Original languageEnglish (US)
Pages (from-to)245-256
Number of pages12
JournalNumerical Heat Transfer; Part A: Applications
Volume63
Issue number4
DOIs
StatePublished - Jan 1 2013

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Heat Exchanger
heat exchangers
Laminar flow
Pressure drop
Heat exchangers
Reynolds number
Heat transfer
Pressure Drop
Laminar Flow
pressure drop
laminar flow
Flow of fluids
heat transfer
Friction
Heat Transfer Enhancement
Fabrication
embossing
Geometry
Computer simulation
three dimensional models

Cite this

Flow regime determination for finned heat exchanger surfaces with dimples/protrusions. / Sparrow, Ephraim M; Gorman, John M; Friend, Kyle S.; Abraham, John P.

In: Numerical Heat Transfer; Part A: Applications, Vol. 63, No. 4, 01.01.2013, p. 245-256.

Research output: Contribution to journalArticle

Sparrow, Ephraim M ; Gorman, John M ; Friend, Kyle S. ; Abraham, John P. / Flow regime determination for finned heat exchanger surfaces with dimples/protrusions. In: Numerical Heat Transfer; Part A: Applications. 2013 ; Vol. 63, No. 4. pp. 245-256.
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