A review of experimental and simulation methods for determining accommodation coefficients, particularly TMAC, at fluid-surface interfaces

IF 2.3 4区 工程技术 Q2 INSTRUMENTS & INSTRUMENTATION
Sadegh Yousefi-Nasab, Jaber Safdari, Javad Karimi-Sabet
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引用次数: 0

Abstract

Accommodation Coefficients (ACs) are used in slip models to determine some important parameters for flowing dilute gases on solid surfaces such as: Cercignani–Lampis–Lord (CLL) model, drag coefficient, slip velocity, shear stress, and temperature jump. These coefficients in slip, transitional, and free molecular flow regimes take values other than unity. As a result, determining these coefficients for different gases and surfaces is crucial, especially where the continuum assumption with no-slip conditions at the surface is inaccurate. These coefficients can be extracted using experimental and simulation methods with different techniques. This paper provides a review of studies that have been conducted to determine the ACs, with a particular focus on the tangential momentum accommodation coefficient (TMAC), using both experimental and simulation methods. The research mainly pertains to microfluidics and nanofluidics. The reviewed studies have concluded that there is no clear relationship between the molecular weight of a gas and it’s TMAC. Also, the values of ACs depend on various factors.

Abstract Image

Abstract Image

确定流体-表面界面上的容纳系数,特别是 TMAC 的实验和模拟方法综述
滑移模型中的容纳系数(AC)用于确定稀释气体在固体表面流动时的一些重要参数,如:Cercignani-Lampis-Lord(CLL)模型的阻力系数、滑移速度、剪切应力和温度跃迁:Cercignani-Lampis-Lord(CLL)模型、阻力系数、滑移速度、剪切应力和温度跃迁。这些系数在滑移、过渡和自由分子流动状态下的取值均不等于一。因此,确定不同气体和表面的这些系数至关重要,尤其是在表面无滑动条件的连续假设不准确的情况下。这些系数可以通过不同技术的实验和模拟方法提取出来。本文回顾了使用实验和模拟方法确定 AC 的研究,尤其侧重于切向动量容纳系数 (TMAC)。研究主要涉及微流体和纳米流体。综述研究得出的结论是,气体的分子量与其切向动量容纳系数之间没有明确的关系。此外,AC 值还取决于各种因素。
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来源期刊
Microfluidics and Nanofluidics
Microfluidics and Nanofluidics 工程技术-纳米科技
CiteScore
4.80
自引率
3.60%
发文量
97
审稿时长
2 months
期刊介绍: Microfluidics and Nanofluidics is an international peer-reviewed journal that aims to publish papers in all aspects of microfluidics, nanofluidics and lab-on-a-chip science and technology. The objectives of the journal are to (1) provide an overview of the current state of the research and development in microfluidics, nanofluidics and lab-on-a-chip devices, (2) improve the fundamental understanding of microfluidic and nanofluidic phenomena, and (3) discuss applications of microfluidics, nanofluidics and lab-on-a-chip devices. Topics covered in this journal include: 1.000 Fundamental principles of micro- and nanoscale phenomena like, flow, mass transport and reactions 3.000 Theoretical models and numerical simulation with experimental and/or analytical proof 4.000 Novel measurement & characterization technologies 5.000 Devices (actuators and sensors) 6.000 New unit-operations for dedicated microfluidic platforms 7.000 Lab-on-a-Chip applications 8.000 Microfabrication technologies and materials Please note, Microfluidics and Nanofluidics does not publish manuscripts studying pure microscale heat transfer since there are many journals that cover this field of research (Journal of Heat Transfer, Journal of Heat and Mass Transfer, Journal of Heat and Fluid Flow, etc.).
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