Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement
The liquid crystal-based method is a new technology developed for flow visualizations and measurements at microscale with great potentials. It is the priority to study the flow characteristics before implementation of such a technology. A numerical analysis has been applied to solve the simplified d...
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sg-ntu-dr.10356-1459732023-03-04T17:11:21Z Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement Zhu, Jianqin Tang, Runze Chen, Yu Yin, Shuai Huang, Yi Wong, Teckneng School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Liquid Crystal Shear Flow The liquid crystal-based method is a new technology developed for flow visualizations and measurements at microscale with great potentials. It is the priority to study the flow characteristics before implementation of such a technology. A numerical analysis has been applied to solve the simplified dimensionless two-dimensional Leslie-Ericksen liquid crystal dynamic equation. This allows us to analyze the coupling effect of the LC's director orientation and flow field. We will be discussing two classic shear flow cases at microscale, namely Couette and Poiseuille flow. In both cases, the plate drag speed in the state of Couette flow are varied as well as the pressure gradients in Poiseuille flow state are changed to study their effects on the flow field distributions. In Poiseuille flow, with the increase of applied pressure gradient, the influence of backflow significantly affects the flow field. Results show that the proposed method has great advantages on measurement near the wall boundaries which could complement to the current adopted flow measurement technique. The mathematical model proposed in this article could be of great potentials in the development of the quantitatively flow measurement technology. Ministry of Education (MOE) Published version This research was funded by the Program for National Natural Science Foundation ofChina (no. 51876005 and 52006005). This work is also supported by Ministry of Education Singaporethrough the Academic Research Fund under Projects MOE Tier 1, RG 94/16 and RG 98/18. 2021-01-19T05:59:51Z 2021-01-19T05:59:51Z 2020 Journal Article Zhu, J., Tang, R., Chen, Y., Yin, S., Huang, Y., & Wong, T. (2020). Investigation of Shear-Driven and Pressure-Driven Liquid Crystal Flow at Microscale: A Quantitative Approach for the Flow Measurement. Micromachines, 12(1), 28-. doi:10.3390/mi12010028 2072-666X https://hdl.handle.net/10356/145973 10.3390/mi12010028 33383897 2-s2.0-85098685985 1 12 en RG 94/16 RG 98/18 Micromachines © 2020 The Authors. Li-censee MDPI, Basel, Switzerland.This article is an open access article distributed under the terms and conditions of the Creative Commons At-tribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). application/pdf |
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Engineering::Mechanical engineering Liquid Crystal Shear Flow Zhu, Jianqin Tang, Runze Chen, Yu Yin, Shuai Huang, Yi Wong, Teckneng Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement |
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The liquid crystal-based method is a new technology developed for flow visualizations and measurements at microscale with great potentials. It is the priority to study the flow characteristics before implementation of such a technology. A numerical analysis has been applied to solve the simplified dimensionless two-dimensional Leslie-Ericksen liquid crystal dynamic equation. This allows us to analyze the coupling effect of the LC's director orientation and flow field. We will be discussing two classic shear flow cases at microscale, namely Couette and Poiseuille flow. In both cases, the plate drag speed in the state of Couette flow are varied as well as the pressure gradients in Poiseuille flow state are changed to study their effects on the flow field distributions. In Poiseuille flow, with the increase of applied pressure gradient, the influence of backflow significantly affects the flow field. Results show that the proposed method has great advantages on measurement near the wall boundaries which could complement to the current adopted flow measurement technique. The mathematical model proposed in this article could be of great potentials in the development of the quantitatively flow measurement technology. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Zhu, Jianqin Tang, Runze Chen, Yu Yin, Shuai Huang, Yi Wong, Teckneng |
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Article |
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Zhu, Jianqin Tang, Runze Chen, Yu Yin, Shuai Huang, Yi Wong, Teckneng |
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Zhu, Jianqin |
title |
Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement |
title_short |
Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement |
title_full |
Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement |
title_fullStr |
Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement |
title_full_unstemmed |
Investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement |
title_sort |
investigation of shear-driven and pressure-driven liquid crystal flow at microscale : a quantitative approach for the flow measurement |
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2021 |
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https://hdl.handle.net/10356/145973 |
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1759855690206150656 |