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2023 | OriginalPaper | Buchkapitel

5. Flow Boiling on a Porous Surface

verfasst von : Brandon M. Shadakofsky, Francis A Kulacki

Erschienen in: Flow Boiling of a Dilute Emulsion In Smooth and Rough Microgaps

Verlag: Springer International Publishing

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Abstract

The relevant literature regarding boiling of fluids on microporous surfaces is reviewed, including techniques for depositing microporous surfaces on a substrate. Focus is given to the effect of the microporous surface on the onset of nucleate boiling (ONB) and critical heat flux (CHF). Experimental data is then presented for boiling heat transfer and pressure drop in microgaps with microporous surfaces. The experimental data is compared to heat transfer and pressure drop at similar experimental conditions with no microporous surfaces.

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Vorheriges Kapitel Flow Boiling of Dilute Emulsions in a Microgap

Nächstes Kapitel Physical Mechanisms and Correlation

See Fig. 2.3 for the emulsion droplet distribution, Figs. 2.6, 2.7, and 2.8 for SEM images of the porous surfaces, and Table 2.2 for the porosity of each surface. Although the emulsions have an average droplet size of 10.7 μm, there are droplets as large as 25–30 μm present in the flow. For Porous Surface 1, there are a few pores of ~20 μm, but most of the surface is densely packed with pores <5 μm, resulting in a lower porosity than the other two surfaces. Porous Surface 3 has many pores on the top ~20 μm across and greater, but the side view shows a densely packed surface with relatively few pores >10 μm. In distinction, Porous Surface 2 has many pores of ~30 μm on the top and through the thickness, resulting in a more open structure throughout.

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Titel: Flow Boiling on a Porous Surface
verfasst von: Brandon M. Shadakofsky
Francis A Kulacki
Verlag: Springer International Publishing
Buch: Flow Boiling of a Dilute Emulsion In Smooth and Rough Microgaps
Print ISBN: 978-3-031-27772-6

Electronic ISBN: 978-3-031-27773-3

Copyright-Jahr: 2023
DOI: https://doi.org/10.1007/978-3-031-27773-3_5

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