Evaporation and evolution of suspended solution droplets at atmospheric and reduced pressures
Evaporation and evolution of suspended solution droplets at atmospheric and reduced pressures
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DOI：
10.1080/07373930701394977
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发表时间：
2007-01-01
影响因子：
3.3
通讯作者：
Ashgriz, Nasser
中科院分区：
文献类型：
--
作者：
Eslamian, Morteza;Ashgriz, Nasser
研究了氯化钠（NaCl）、硫酸镁（MgSO4）和羟氯化锆（ZrO(OH)Cl）悬浮液滴在常压和减压下蒸发的热历史和溶质析出行为。介绍并讨论了蒸发过程中液滴直径、溶液浓度和温度变化的实验测量结果。在光学显微镜下对溶质析出行为的观察结果进行了展示和讨论。结果表明，降低压力（约为33kPa）会导致溶液液滴蒸发速率的变化，但特定溶液液滴在常压和减压下的热历史相似。在本研究中使用的常压和减压下，溶液液滴的d(2)定律在蒸发的早期阶段和溶质沉淀开始之前是有效的。MgSO4和ZrO(OH)Cl溶液液滴干燥后形成球形颗粒，NaCl溶液液滴干燥后形成立方颗粒。
Thermal history and solute precipitation behavior of suspended solution droplets of sodium chloride (NaCl), magnesium sulphate (MgSO4), and zirconium hydroxychloride (ZrO(OH)Cl) evaporating at atmospheric and reduced pressures are studied. Experimental measurements on the variation of droplet diameter, solution concentration, and temperature during the evaporation period are presented and discussed. The results of solute precipitation behavior in solution droplets observed under an optical microscope are displayed and discussed. Results indicate that reducing the pressure (similar to 33kPa) results in a change in the solution droplet evaporation rate, but the thermal histories of a particular solution droplet are similar at the atmospheric and reduced pressures. At atmospheric and reduced pressures used in this study, the d(2) law for solution droplets is valid at early stages of the evaporation and before the solute precipitation initiates. Drying of MgSO4 and ZrO(OH)Cl solution droplets results in the formation of spherical particles, whereas drying of spherical NaCl solution droplets results in the formation of cubic particles.