Nucleation of Spatial Wave Modes on the Surface of a Viscous Fluid Film Flowing down a Vertical Cylinder at the Appearance of New Instability Regions

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL

Journal of Engineering Thermophysics Pub Date : 2025-10-16 DOI:10.1134/S1810232825020067

O. Yu. Tsvelodub

引用次数: 0

Abstract

The flow of a viscous fluid film along the outer surface of a vertical cylinder is considered. For this purpose, a model nonlinear evolution equation for the deviation of the film thickness from the unperturbed level is used. When the region of instability corresponding to a certain azimuthal wave number is narrow enough, a simplified system of equations is obtained from the original equation. It is valid for describing spatially periodic solutions at all wave numbers from the neighborhood of this region. The solutions of this system are presented for several values of the azimuthal wave number.

Abstract Image

查看原文本刊更多论文

在新的不稳定区域出现时，沿垂直圆柱体向下流动的粘性流体膜表面空间波模的成核

考虑沿垂直圆柱体外表面的粘性流体膜的流动。为此，采用了薄膜厚度偏离无扰动水平的模型非线性演化方程。当某一方位角波数所对应的失稳区域足够窄时，由原方程得到简化方程组。它适用于从该区域的邻域出发，描述所有波数处的空间周期解。给出了该系统在几个方位波数值下的解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Engineering Thermophysics THERMODYNAMICS-ENGINEERING, MECHANICAL

CiteScore

2.30

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： Journal of Engineering Thermophysics is an international peer reviewed journal that publishes original articles. The journal welcomes original articles on thermophysics from all countries in the English language. The journal focuses on experimental work, theory, analysis, and computational studies for better understanding of engineering and environmental aspects of thermophysics. The editorial board encourages the authors to submit papers with emphasis on new scientific aspects in experimental and visualization techniques, mathematical models of thermophysical process, energy, and environmental applications. Journal of Engineering Thermophysics covers all subject matter related to thermophysics, including heat and mass transfer, multiphase flow, conduction, radiation, combustion, thermo-gas dynamics, rarefied gas flow, environmental protection in power engineering, and many others.