不同接触角下垂直圆柱体液膜的下落模式

IF 1 4区 物理与天体物理 Q4 PHYSICS, APPLIED High Temperature Pub Date : 2024-03-20 DOI:10.1134/s0018151x23030173
A. Yu. Sakhnov, O. A. Volodin, N. I. Pecherkin, A. N. Pavlenko
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引用次数: 0

摘要

摘要 我们介绍了对制冷剂混合物(0.9 摩尔分数 R21 + R114)的降膜动力学进行三维数值模拟的结果,考虑了液体沿圆形垂直圆柱体外侧表面的流动,雷诺数为 104,接触角为 10°、30°、50°、70° 和 90°。模拟采用 OpenFOAM 软件中的流体体积 (VOF) 法进行。接触角对润湿表面的面积有显著影响,这是因为液体从圆筒中落下的模式发生了变化。确定了以下流动模式:连续薄膜、稳定喷射模式、级联喷射模式和大量喷射模式。这些模式与水平管上的液体流动模式相似。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Modes of a Liquid Film Falling Down a Vertical Cylinder at Different Contact Angles

Abstract

We present the results of a three-dimensional numerical simulation of the dynamics of a falling film of a mixture of refrigerants, 0.9 mol fraction R21 + R114, considering the liquid flow along the outer lateral surface of a round vertical cylinder for a Reynolds number of 104 and contact angles of 10°, 30°, 50°, 70°, and 90°. The simulation was carried out using the volume of fluid (VOF) method in the OpenFOAM software. The contact angle has a significant effect on the area of the wetted surface due to a change in the modes of liquid falling down the cylinder. The following flow modes are identified: continuous film, stable jet mode, cascade jet mode, and massive jet mode. These modes are similar to the modes of fluid flow on horizontal tubes.

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来源期刊
High Temperature
High Temperature 物理-物理:应用
CiteScore
1.50
自引率
40.00%
发文量
0
审稿时长
4-8 weeks
期刊介绍: High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.
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