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Fluids 2017, 2(1), 8; doi:10.3390/fluids2010008

On the CFD Analysis of a Stratified Taylor-Couette System Dedicated to the Fabrication of Nanosensors

1
Department of Industrial Engineering (DIEF), University of Florence, via di S. Marta 3, Florence 50139, Italy
2
“Nello Carrara” Institute of Applied Physics—National Research Council (IFAC-CNR), Via Madonna del Piano 10, Sesto Fiorentino 50019, Italy
3
Enrico Fermi Centre, Piazza del Viminale 1, Roma 00184, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Asterios Pantokratoras
Received: 27 December 2016 / Revised: 8 February 2017 / Accepted: 14 February 2017 / Published: 18 February 2017
(This article belongs to the Special Issue Computational Fluid Dynamics)
View Full-Text   |   Download PDF [6777 KB, uploaded 18 February 2017]   |  

Abstract

Since the pioneering work of Taylor, the analysis of flow regimes of incompressible, viscous fluids contained in circular Couette systems with independently rotating cylinders have charmed many researchers. The characteristics of such kind of flows have been considered for some industrial applications. Recently, Taylor-Couette flows found an innovative application in the production of optical fiber nanotips, to be used in molecular biology and medical diagnostic fields. Starting from the activity of Barucci et al., the present work concerns the numerical analysis of a Taylor-Couette system composed by two coaxial counter-rotating cylinders with low aspect ratio and radius ratio, filled with three stratified fluids. An accurate analysis of the flow regimes is performed, considering both the variation of inner and outer rotational speed and the reduction of fiber radius due to etching process. The large variety of individuated flow configurations provides useful information about the possible use of the Taylor-Couette system in a wide range of engineering applications. For the present case, the final objective is to provide accurate information to manufacturers of fiber nanotips about the expected flow regimes, thus helping them in the setup of the control process that will be used to generate high-quality products. View Full-Text
Keywords: Taylor-Couette; Computational Fluid Dynamics (CFD); multiphase; nanotips; nanosensors; shear stress; Volume Of Fluid (VOF); stratified; etching; counter-rotating Taylor-Couette; Computational Fluid Dynamics (CFD); multiphase; nanotips; nanosensors; shear stress; Volume Of Fluid (VOF); stratified; etching; counter-rotating
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Griffini, D.; Insinna, M.; Salvadori, S.; Barucci, A.; Cosi, F.; Pelli, S.; Righini, G.C. On the CFD Analysis of a Stratified Taylor-Couette System Dedicated to the Fabrication of Nanosensors. Fluids 2017, 2, 8.

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