Empirical derivation of a Nusselt number in a thermally stratified enclosure

A hydrophilic gelatin suspension possesses thermal properties that may affect the ratio of convective to conductive heat transfer across a boundary. This ratio, also known as Nusselt's number, can represent laminar or turbulent flow regimes. In this study, thermal transitioning empirical values...

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Bibliographic Details
Published in:International journal of thermal sciences 2020-03, Vol.149 (C), p.106209, Article 106209
Main Authors: Hagiwara, Izumi, Tokuhiro, A., Oduor, P.G.
Format: Article
Language:English
Subjects:
Hydrophilic particle
Single-phase
Two-phase flow
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Summary:A hydrophilic gelatin suspension possesses thermal properties that may affect the ratio of convective to conductive heat transfer across a boundary. This ratio, also known as Nusselt's number, can represent laminar or turbulent flow regimes. In this study, thermal transitioning empirical values were determined using a gelatin as a polymer gel surrogate. The crux of this study was to (a) quantify heat transfer properties of the gelatin as a suspended semi-solid and (b) understand thermal profiles with respect to particle size and loading. We can adduce the existence of a thermally induced: lower rise velocity, stratified Nusselt number, and a boundary layer.
ISSN:1290-0729
1778-4166
DOI:10.1016/j.ijthermalsci.2019.106209