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A Model of the Evaporation of Binary-Fuel Clusters of Drops

Harstad, K. and Bellan, Josette (1991) A Model of the Evaporation of Binary-Fuel Clusters of Drops. Atomization and Sprays, 1 (4). pp. 367-388. ISSN 1044-5110. doi:10.1615/AtomizSpr.v1.i4.20.

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A formulation has been developed to describe the evaporation of dense or dilute clusters of binary-fuel drops. The binary fuel is assumed to be made of a solute and a solvent whose volatility is much lower than that of the solute. Convective flow effects, inducing a circulatory motion inside the drops, are taken into account, as well as turbulence external to the cluster volume. Results obtained with this model show that, similar to the conclusions for single, isolated drops, the evaporation of the volatile is controlled by liquid mass diffusion when the cluster is dilute. In contrast, when the cluster is dense, the evaporation of the volatile is controlled by surface layer stripping, that is, by the regression rate of the drop, which is, in fact, controlled by the evaporation rate of the solvent. These conclusions are in agreement with existing experimental observations. Parametric studies show that these conclusions remain valid with changes in ambient temperature, initial slip velocity between drops and gas, initial drop size, initial cluster size, initial liquid mass fraction of the solute, and various combinations of solvent and solute. The implications of these results for computationally intensive combustor calculations are discussed.

Item Type:Article
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URLURL TypeDescription DOIArticle,000ba8626c31f878,23be8c9c3e63e109.htmlPublisherArticle
Bellan, Josette0000-0001-9218-7017
Additional Information:© 1991 Begell House.
Issue or Number:4
Record Number:CaltechAUTHORS:20171027-160538311
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82756
Deposited By: Tony Diaz
Deposited On:27 Oct 2017 23:35
Last Modified:15 Nov 2021 19:52

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