通过弯曲通道中的二次流测量流体粘度

Fluid Viscosity Measurement by Means of Secondary Flow in a Curved Channel.

作者信息

Pryazhnikov Maxim I, Yakimov Anton S, Denisov Ivan A, Pryazhnikov Andrey I, Minakov Andrey V, Belobrov Peter I

机构信息

Laboratory of Physical and Chemical Technologies for the Development of Hard-to-Recover Hydrocarbon Reserves, Siberian Federal University, 660041 Krasnoyarsk, Russia.

Laboratory of Heat Exchange Control in Phase and Chemical Transformations, Kutateladze Institute of Thermophysics, 630090 Novosibirsk, Russia.

出版信息

Micromachines (Basel). 2022 Sep 2;13(9):1452. doi: 10.3390/mi13091452.

DOI:10.3390/mi13091452

PMID:36144075

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9502554/

Abstract

This article presents a new approach to determining the viscosity of Newtonian fluid. The approach is based on the analysis of the secondary Dean flow in a curved channel. The study of the flow patterns of water and aqueous solutions of glycerin in a microfluidic chip with a U-microchannel was carried out. The advantages of a microfluidic viscometer based on a secondary Dean flow are its simplicity, quickness, and high accuracy in determining the viscosity coefficient of a liquid. A viscosity image in a short movie represents fluid properties. It is revealed that the viscosity coefficient can be determined by the dependence of the recirculation angle of the secondary Dean flow. The article provides a correlation between the Dean number and the flow recirculation angle. The results of the field experiment, presented in the article, correlate with the data obtained using computational fluid dynamics and allow for selecting parameters to create microfluidic viscometers with a U-shaped microchannel.

摘要

本文提出了一种测定牛顿流体粘度的新方法。该方法基于对弯曲通道中二次Dean流的分析。对具有U形微通道的微流控芯片中水流和甘油水溶液的流动模式进行了研究。基于二次Dean流的微流控粘度计的优点在于其在测定液体粘度系数方面的简单性、快速性和高精度。短片中的粘度图像代表了流体特性。结果表明，粘度系数可通过二次Dean流的再循环角的相关性来确定。本文给出了Dean数与流动再循环角之间的关联。文中呈现的现场实验结果与使用计算流体动力学获得的数据相关，并有助于选择参数以制造具有U形微通道的微流控粘度计。