Transient modeling of heat, mass and momentum transfer of an evaporating cerium nitrate solution droplet with a surrounding shell in a rf thermal argon-oxygen plasma under reduced pressure

I. Castillo; R. J. Munz

首页> 外文期刊>International Journal of Heat and Mass Transfer >Transient modeling of heat, mass and momentum transfer of an evaporating cerium nitrate solution droplet with a surrounding shell in a rf thermal argon-oxygen plasma under reduced pressure

【24h】

Transient modeling of heat, mass and momentum transfer of an evaporating cerium nitrate solution droplet with a surrounding shell in a rf thermal argon-oxygen plasma under reduced pressure

机译：减压条件下射频热氩氧等离子体中蒸发的硝酸铈溶液小滴与周围壳体的热，质量和动量传递的瞬态模型

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

A model was developed to study the evaporation of a solution droplet surrounded by a porous crust in a stagnant rf Ar-O_2 thermal plasma under reduced pressure. This model considered a three phase system: a liquid core of dissolved Ce(NO_3)_3 • 6H_2O in water, a porous crust of homogeneously precipitated spherical crystals of equal size containing water vapor, and an Ar-O_2 plasma under reduced pressure. The model was solved considering a receding solution/crust interface in an ALE frame using temperature and composition dependant thermophysical properties. Darcy flow with a Knudsen correction to account for the gaseous flow through a porous media composed of nano-sized crystals was employed. The strength of the solid/liquid interface was calculated by computing the strength of liquid bridges formed at this interface. This value was compared to the pressure build-up caused by solvent evaporation and the point of crust breakage was determined at different operating conditions. The effects of plasma gas temperature, pressure and composition, droplet size, size of precipitated crystals and crust porosity on crust bursting were studied. The results showed that crust bursting occurred for all the conditions analyzed and that plasma temperature, droplet size and the size of the precipitated crystals had a significant effect on pressure build-up.

机译：开发了一个模型来研究在停滞的rf Ar-O_2热等离子体中在减压下被多孔壳包围的溶液液滴的蒸发。该模型考虑了一个三相系统：在水中溶解了Ce（NO_3）_3•6H_2O的液核，包含水蒸气的等大小的均匀沉淀的球形晶体的多孔硬壳，以及在减压下的Ar-O_2等离子体。考虑温度和成分相关的热物理特性，考虑ALE框架中的后退溶液/结壳界面来求解模型。采用达克西修正值的达西流，以说明通过纳米级晶体组成的多孔介质的气体流。固/液界面的强度通过计算在该界面形成的液桥的强度来计算。将该值与溶剂蒸发引起的压力增加进行比较，并确定在不同操作条件下的结壳破裂点。研究了等离子气体温度，压力和组成，液滴大小，析出晶体的大小和地壳孔隙度对地壳破裂的影响。结果表明，在所分析的所有条件下均会发生结壳破裂，并且等离子体温度，液滴尺寸和沉淀晶体的尺寸对压力累积有显着影响。

著录项

来源
《International Journal of Heat and Mass Transfer》 |2007年第22期|4468-4487|共20页
作者
I. Castillo; R. J. Munz;
展开▼
作者单位

Department of Chemical Engineering, McGill University, 3610 University St. Wong Building, Montreal, Quebec, Canada H3A 2B2;

展开▼
收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类热力工程理论;热学;
关键词
evaporation; solution droplet; crust formation; cerium nitrate; thermal plasma; ale model; darcy flow; knudsen effect; liquid bridges;

机译：蒸发;溶液滴地壳形成;硝酸铈热等离子体啤酒模型达西流努森效应液桥;

相似文献

外文文献
中文文献
专利

1. Transient heat, mass and momentum transfer of an evaporating stationary droplet containing dissolved cerium nitrate in a rf thermal argon-oxygen plasma under reduced pressure [J] . I. Castillo, R.J. Munz International Journal of Heat and Mass Transfer . 2007,第1a2期

机译：减压热射频氩氧等离子体中含有溶解的硝酸铈的蒸发固定液滴的瞬态热，质量和动量传递
2. Numerical Method for Heat and Mass Transfer in Air Washer- 1. Mathematical Solution for a Droplet Evaporating in Finite Surrounding Airstream [J] . Ni Bo Journal of China Textile University . 1999,第4期

机译：空气洗涤器传热传质的数值方法-1.有限周围气流中液滴蒸发的数学解
3. Numerical Method for Heat and Mass Transfer in Air Washer——1.Mathematical Solution for a Droplet Evaporating in Finite Surrounding Airstream [J] . 倪波东华大学学报：英文版 . 1999,第004期

机译：空气垫圈中热量和传质的数值方法 - 1.在有限气流中蒸发液滴的测量溶液
4. SIMULATION OF GRANULATED DROPLET FORMATION FROM THIN FILM UNDER THE INFLUENCE OF AN ELECTRIC FIELD AND THE EFFECT OF CONDENSATION AND EVAPORATION HEAT TRANSFER ON THE TRANSIENT DROPLET SURFACE CONFIGURATION [C] . Hideki Nariai, Akira Yabe, Katsuya Yamashita ASME/JSME Thermal Engineering Joint Conference . 1999

机译：电场影响下薄膜颗粒状液滴形成的仿真及凝结和蒸发传热对瞬态液滴表面构造的影响
5. An investigation of the evaporation of a droplet on a solid surface: Evaporation, self-assembly of colloidal deposits, and interfacial heat transfer. [D] . Bhardwaj, Rajneesh. 2010

机译：固体表面上的液滴蒸发的研究：蒸发，胶体沉积物的自组装和界面传热。
6. Mass and heat transfer between evaporation and condensation surfaces: Atomistic simulation and solution of Boltzmann kinetic equation [O] . Vasily V. Zhakhovsky, Alexei P. Kryukov, Vladimir Yu. Levashov, 2019

机译：蒸发和冷凝表面之间的质量和热传递：原子模拟和玻尔兹曼动力学方程的解
7. This article presents a new numerical model describing the behaviour of a thermally thick wood sample exposed to high solar heat flux (above 1 MW/m2). A preliminary study based on dimensionless numbers is used to classify the problem and support model building assumptions. Then, a model based on mass, momentum and energy balance equations is proposed. These equations are coupled with liquid-vapour drying model and pseudo species biomass degradation model. By comparing to a former experimental study, preliminary results have shown that these equations are not enough to accurately predict biomass behaviour under high solar heat flux. Indeed, a char layer acting as radiative shield forms on the sample exposed surface. In addition to this classical set of equations, it is mandatory to take into account radiation penetration into the medium. Furthermore, as biomass contains water, medium deformation consecutively to char steam gasification must also be implemented. Finally, with the addition of these two strategies, the model is able to properly capture the degradation of biomass when exposed to high radiative heat flux over a range of sample initial moisture content. Additional insights of biomass behaviour under high solar heat flux were also derived. Drying, pyrolysis and gasification fronts are present at the same time inside of the sample. The coexistence of these three thermochemical fronts leads to char gasification by the steam produced from drying of the sample, which it is the main phenomenon behind medium ablation. [O] . Pozzobon, Victor, Salvador, Sylvain, Bézian, Jean Jacques 2018

机译：本文提供了一个新的数值模型，该模型描述了暴露于高太阳热通量（高于1 / MW / m2）的热厚木材样品的行为。基于无量纲数的初步研究用于对问题进行分类并支持模型构建假设。然后，提出了一种基于质量，动量和能量平衡方程的模型。这些方程式与液体蒸汽干燥模型和假物种生物质降解模型耦合。通过与以前的实验研究进行比较，初步结果表明，这些方程不足以准确预测高太阳热通量下的生物量行为。的确，在样品暴露的表面上形成了充当辐射屏蔽层的炭层。除了这套经典的方程式之外，还必须考虑到辐射向介质的渗透。此外，由于生物质中含有水，因此还必须在炭蒸气汽化后进行连续的介质变形。最后，通过添加这两种策略，该模型能够在一定范围的样品初始水分含量下暴露于高辐射热通量的情况下，正确捕获生物质的降解。还得出了在高太阳热通量下生物量行为的其他见解。样品内部同时存在干燥，热解和气化前沿。这三个热化学前沿的共存会导致样品干燥产生的蒸汽产生焦炭气化，这是介质烧蚀的主要现象。
8. Modeling Droplet Heat and Mass Transfer during Spray Bar Pressure Control of the Multipurpose Hydrogen Test Bed (MHTB) Tank in Normal Gravity. [R] . Kartuzova, O., Kassemi, M. 2016

机译：正常重力下多用途氢试验箱（mHTB）喷杆压力控制过程中液滴传热传质模型。

Transient modeling of heat, mass and momentum transfer of an evaporating cerium nitrate solution droplet with a surrounding shell in a rf thermal argon-oxygen plasma under reduced pressure

摘要

著录项

相似文献

相关主题

期刊订阅