层流条件下疏水微通道滑移行为及减摩效应的数值模拟

IF 1.1 4区工程技术 Q4 THERMODYNAMICS

Thermal Science Pub Date : 2023-01-01 DOI:10.2298/tsci2304405d

Bekir Dogan, Mustafa Ozbey, Lutfu Namli, Unsal Aybek

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引用次数: 0

摘要

对具有微结构的粗糙表面和光滑表面的滑动特性进行了数值模拟。利用ANSYS FLUENT软件对微通道内的剪切流动进行了模拟。通过选择流体体积模型，模拟了三维两相流动。在CFD分析中，水和空气由两种不混相组成。在计算中，如果水是第一流体，空气是第二流体，则进行调整。在分析开始时，通道被认为完全充满空气，在计算中忽略重力的影响。水和空气被认为是牛顿流体和不可压缩流体。此外，还进行了层流和稳态计算。结果表明，压降的减小随凸点间距(无剪切分数)的增加而增加。在模拟结果中，在界面处测量了微通道轴上约14%的速度。本研究的主要目的是利用ANSYS Fluent CFD软件评估流体体积模型在疏水微通道三维流动设计中的适用性。

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Numerical simulation of slip behaviors and friction reduction effects in hydrophobic micro-channel in laminar flow conditions

In the study, a numerical simulation of the sliding properties of the rough and smooth surfaces with micro-structure was made. The simulation of shear flow in the micro-channel was performed with ANSYS FLUENT software. The 3-D and two-phase flow is simulated by choosing the volume of fluid model. In CFD analysis, water and air consist of two immiscible phases. In the calculations, if water is the first fluid and air is the second fluid, adjustments are made. At the beginning of the analysis, the channel was considered to be completely filled with air and the effect of gravity was ignored during the calculation. Water and air are considered Newtonian and incompressible fluids. In addition, laminar flow and steady-state calculations are made. It was found that the decrease in pressure drop increased with increasing distance between asperities (no-shear fraction). In the simulation results, approximately 14% of the velocity in the micro-channel axis was measured at the interface. The main purpose of this study is to evaluate the applicability of the volume of fluid model in a hydrophobic micro-channel flow designed in 3-D using ANSYS Fluent CFD software.

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来源期刊

Thermal Science 工程技术-热力学

CiteScore

2.70

自引率

29.40%

发文量

399

审稿时长

5 months

期刊介绍： The main aims of Thermal Science to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes in single, and specifically in multi-phase and multi-component flows in high-temperature chemically reacting flows processes present in thermal engineering, energy generating or consuming equipment, process and chemical engineering equipment and devices, ecological engineering, The important characteristic of the journal is the orientation to the fundamental results of the investigations of different physical and chemical processes, always jointly present in real conditions, and their mutual influence. To publish papers written by experts from different fields: mechanical engineering, chemical engineering, fluid dynamics, thermodynamics and related fields. To inform international scientific community about the recent, and most prominent fundamental results achieved in the South-East European region, and particularly in Serbia, and - vice versa - to inform the scientific community from South-East European Region about recent fundamental and applied scientific achievements in developed countries, serving as a basis for technology development. To achieve international standards of the published papers, by the engagement of experts from different countries in the International Advisory board.