Modeling of thermo-physical processes in liquid ceramic precursor droplets injected into a plasma jet

被引：39

作者：

Basu, Saptarshi ^{[1
]}

Cetegen, Baki M. ^{[1
]}

机构：

[1] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2007年 / 50卷 / 17-18期

关键词：

droplet/plasma interaction; solute precipitation; droplet heating; vaporization; ceramic precursors;

D O I：

10.1016/j.ijheatmasstransfer.2007.01.036

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Modeling of liquid ceramic precursor droplets axially injected into a plasma is presented. Droplets undergo heating and solvent vaporization leading to high solute concentration near droplet surface. At a critical solute super-saturation concentration, precipitation is postulated to occur forming a precipitate shell around liquid core. Internal pressurization and rupture of shell occur subsequently. Droplet size, shell porosity and thickness effects were studied. Timescales of internal pressurization and precipitate formation are of the order of microsecond and millisecond, respectively. Small droplets (d <= 5 mu m) tend to form thick shells and are less likely to undergo shell fracture compared to larger droplets. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：3278 / 3290

页数：13

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