Detailed thermal desalination analysis of a falling film on a horizontal tube using a sharp-interface elliptic numerical model

IF 5.8 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2025-09-23 DOI:10.1016/j.ijheatmasstransfer.2025.127786

Yasaman Tohidi, Scott J. Ormiston

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引用次数: 0

Abstract

An in-house code is utilized to simulate the evaporation from falling films of fresh water and salt water over an isothermal horizontal tube. Full elliptic governing equations for the liquid and gas phases are solved employing a two-dimensional, two-phase model. This modelling represents a significant advancement in the simulation of the evaporation phenomenon that employs innovative methods to precisely determine the location of the liquid and gas interface, the mass transfer in the system, and address the occurrence of the supersaturation phenomenon in the mixture phase. It is also capable of capturing reverse flow and recirculation zones. A sharp interface model is used that determines the evaporation rate using an energy balance at the interface. The accuracy of the model is verified by comparing the present results with relevant experimental and numerical data available in the literature. New numerical results are provided for a parametric study examining how variations in inlet salt mass fraction, inlet pressure, inlet mixture Reynolds number, wall temperature, and inlet liquid mass flow rate affect the falling film development, heat transfer, and evaporation rate around the tube.

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采用尖界面椭圆数值模型对水平管内落膜进行了详细的热脱盐分析

利用内部代码来模拟淡水和盐水薄膜在等温水平管上的蒸发。采用二维两相模型求解了液相和气相的全椭圆控制方程。该模型代表了蒸发现象模拟的重大进步，它采用创新的方法来精确确定液气界面的位置，系统中的传质，并解决混合相中过饱和现象的发生。它还能够捕获逆流和再循环区域。使用了一个锐界面模型，该模型利用界面处的能量平衡来确定蒸发速率。通过与文献中的相关实验和数值数据进行比较，验证了模型的准确性。为参数化研究提供了新的数值结果，考察了进口盐质量分数、进口压力、进口混合物雷诺数、壁面温度和进口液体质量流量的变化对管周围降膜发展、传热和蒸发速率的影响。

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来源期刊

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer