Relevant bibliographies by topics / Circular microchannel

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Circular microchannel'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Circular microchannel"

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Ranjith Kumar, Valaparla, Karthik Balasubramanian, K. Kiran Kumar, Nikhil Tiwari, and Kanishk Bhatia. "Numerical investigation of fluid flow and heat transfer characteristics in novel circular wavy microchannel." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 5 (2018): 954–66. http://dx.doi.org/10.1177/0954408918820757.

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In this study, the fluid flow and heat transfer behavior in a novel circular wavy microchannel design is numerically examined and compared with a sinusoidal wavy microchannel. The numerical studies were carried out in the Reynolds number range of 100–300 under a constant heat flux wall boundary condition. The sinusoidal profile has a continuously varying curvature, which peaks at the crests and troughs, and diminishes to naught at each section at the middle of adjacent crests and troughs. On the other hand, the circular profile has a curvature constant in magnitude (and alternating in directio
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Kumar, Valaparla Ranjith, Karthik Balasubramanian, K. Kiran Kumar, Kanishk Bhatia, and Nikhil Tiwari. "Numerical investigation of heat transfer and fluid flow characteristics in circular wavy microchannel with tangentially branched secondary channels." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 6 (2019): 1304–16. http://dx.doi.org/10.1177/0954408919869543.

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Wavy microchannels have been shown to possess improved heat transfer capabilities because of greater fluid mixing and boundary layer thinning. In this study, fluid flow and heat transfer characteristics of circular wavy microchannels with tangentially branched secondary channels, were numerically investigated. Its heat transfer and fluid flow characteristics were compared with other specific wavy microchannel geometries. Three-dimensional numerical studies were carried out in the Reynolds number range of 100–300 with uniform heat flux wall boundary condition, using Ansys Fluent commercial soft
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Doganay, Serkan, Levent Cetin, Mehmet Akif Ezan, and Alpaslan Turgut. "Magnetic Field Distributions inside Magnetically Driven Nanofluids for Thermal Management of CPUs." E3S Web of Conferences 162 (2020): 03005. http://dx.doi.org/10.1051/e3sconf/202016203005.

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Herein a magnetic actuation strategy is proposed to manipulate magnetic nanofluids in CPU thermal management applications. The proposed concept consists of a multi-circular microchannel unit and a rotating permanent magnet. A set of numerical simulations have been carried out to evaluate the influences of (i) magnet diameter, (ii) distance between the magnet and the microchannel, and (iii) shape of the magnet on magnetic flux densities (MFD) inside microchannels with Fe3O4 magnetic nanofluid. The results indicated that the MFD on the magnetic nanofluid significantly varies along with the radia
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Jaferian, Vahid, Davood Toghraie, Farzad Pourfattah, Omid Ali Akbari, and Pouyan Talebizadehsardari. "Numerical investigation of the effect of water/Al2O3 nanofluid on heat transfer in trapezoidal, sinusoidal and stepped microchannels." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 5 (2019): 2439–65. http://dx.doi.org/10.1108/hff-05-2019-0377.

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Purpose The purpose of this study is three-dimensional flow and heat transfer investigation of water/Al2O3 nanofluid inside a microchannel with different cross-sections in two-phase mode. Design/methodology/approach The effect of microchannel walls geometry (trapezoidal, sinusoidal and stepped microchannels) on flow characteristics and also changing circular cross section to trapezoidal cross section in laminar flow at Reynolds numbers of 50, 100, 300 and 600 were investigated. In this study, two-phase water/Al2O3 nanofluid is simulated by the mixture model, and the effect of volume fraction o
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Chung, Peter M. Y., Masahiro Kawaji, Akimaro Kawahara, and Yuichi Shibata. "Two-Phase Flow Through Square and Circular Microchannels—Effects of Channel Geometry." Journal of Fluids Engineering 126, no. 4 (2004): 546–52. http://dx.doi.org/10.1115/1.1777227.

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An adiabatic experiment was conducted to investigate the effect of channel geometry on gas-liquid two-phase flow characteristics in horizontal microchannels. A water-nitrogen gas mixture was pumped through a 96 μm square microchannel and the resulting flow pattern, void fraction and frictional pressure drop data were compared with those previously reported by the authors for a 100 μm circular microchannel. The pressure drop data were best estimated using a separated-flow model and the void fraction increased non-linearly with volumetric quality, regardless of the channel shape. However, the fl
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Sun, Dongliang, Jinliang Xu, and Peng Ding. "Numerical research on relationship between flow pattern transition and condensation heat transfer in microchannel." Engineering Computations 31, no. 5 (2014): 939–56. http://dx.doi.org/10.1108/ec-07-2012-0150.

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Purpose – Based on the numerical research on the relationship between the flow pattern transition and the condensation heat transfer in circular microchannels, the purpose of this paper is to bring forward a concept of external separation circular microchannel to regulate and control the flow pattern for enhancing the condensation heat transfer. Design/methodology/approach – The numerical research is based on the volume of fluid method and the vapor-liquid phase change model proposed by the present authors. Findings – By numerical research on the condensation process of water in a general circ
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Deng, Daxiang, Guang Pi, Weixun Zhang, Peng Wang, and Ting Fu. "Numerical Study of Double-Layered Microchannel Heat Sinks with Different Cross-Sectional Shapes." Entropy 21, no. 1 (2018): 16. http://dx.doi.org/10.3390/e21010016.

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This work numerically studies the thermal and hydraulic performance of double-layered microchannel heat sinks (DL-MCHS) for their application in the cooling of high heat flux microelectronic devices. The superiority of double-layered microchannel heat sinks was assessed by a comparison with a single-layered microchannel heat sink (SL-MCHS) with the same triangular microchannels. Five DL-MCHSs with different cross-sectional shapes—triangular, rectangular, trapezoidal, circular and reentrant Ω-shaped—were explored and compared. The results showed that DL-MCHS decreased wall temperatures and ther
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Abdelmalek, Zahra, Annunziata D’Orazio, and Arash Karimipour. "The Effect of Nanoparticle Shape and Microchannel Geometry on Fluid Flow and Heat Transfer in a Porous Microchannel." Symmetry 12, no. 4 (2020): 591. http://dx.doi.org/10.3390/sym12040591.

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Microchannels are widely used in electrical and medical industries to improve the heat transfer of the cooling devices. In this paper, the fluid flow and heat transfer of water–Al2O3 nanofluids (NF) were numerically investigated considering the nanoparticle shape and different cross-sections of a porous microchannel. Spherical, cubic, and cylindrical shapes of the nanoparticle as well as circular, square, and triangular cross-sections of the microchannel were considered in the simulation. The finite volume method and the SIMPLE algorithm have been employed to solve the conservation equations n
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Gonçalves, Inês M., César Rocha, Reinaldo R. Souza, et al. "Numerical Optimization of a Microchannel Geometry for Nanofluid Flow and Heat Dissipation Assessment." Applied Sciences 11, no. 5 (2021): 2440. http://dx.doi.org/10.3390/app11052440.

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In this study, a numerical approach was carried out to analyze the effects of different geometries of microchannel heat sinks on the forced convective heat transfer in single-phase flow. The simulations were performed using the commercially available software COMSOLMultiphysics 5.6® (Burlington, MA, USA) and its results were compared with those obtained from experimental tests performed in microchannel heat sinks of polydimethylsiloxane (PDMS). Distilled water was used as the working fluid under the laminar fluid flow regime, with a maximum Reynolds number of 293. Three sets of geometries were
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Satheeshkumar, M., M. R. Thansekhar, C. Anbumeenakshi, and S. Suresh. "Effect of Geometrical Parameters on Flow Mal-Distribution in a Wavy Microchannel." Applied Mechanics and Materials 813-814 (November 2015): 674–78. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.674.

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Microchannels are of current interest for use in heat exchangers, where very high heat transfer performance is desired. Microchannels provide very high heat transfer coefficients because of their small hydraulic diameters. In this study, a numerical investigation of fluid flow in microchannels with varying hydraulic diameters is presented. Six channels with wavy shape are considered. Header is the major part in the microchannel, which supplies fluid into different channels. A CFD model was created to simulate the fluid flow in the header and microchannels. In this work, five different shapes o
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Dissertations / Theses on the topic "Circular microchannel"

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Broderick, Spencer L. "Thermally Developing Electro-Osmotic Convection in Circular Microchannels." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/232.

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Thermally developing, electro-osmotically generated flow has been analyzed for a circular microtube under imposed constant wall temperature (CWT) and constant wall heat flux (CHF) boundary conditions. Established by a voltage potential gradient along the length of the microtube, the hydrodynamics of such a flow dictate either a slug flow velocity profile (under conditions of large tube radius-to-Debye length ratio, a/lambda_d) or a family of electro-osmotic flow (EOF) velocity profiles that depend on a/lambda_d. The imposed voltage gradient results in Joule heating in the fluid with an associa
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Gerson, Eleanor. "Promoting Endothelial Cell Growth within Microchannels - Modification of Polydimethylsiloxane and Microfabrication of Circular Microchannels." Thesis, Université d'Ottawa / University of Ottawa, 2018. http://hdl.handle.net/10393/37555.

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Polydimethylsiloxane (PDMS) microfluidic channels, fabricated using low cost and simple soft lithography methods, conventionally have rectangular cross-sections. Despite being often used for organs-on-a-chip and cardiovascular research, these devices do not mimic the circular cross-sections of blood vessels in the human body, creating potential inaccuracies in observed flow conditions and cell behaviours. The purpose of this thesis is to (i) compare and optimize fabrication techniques for microchannels with circular cross-sections, (ii) assess biocompatibility of different surface functionaliz
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Zhang, Tong. "Hydrodynamique et étude des transferts de matière gaz-liquide avec réaction dans des microcanaux circulaires." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00804363.

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Cette thèse traite principalement des connaissances fondamentales en hydrodynamique et des caractéristiques des réactions gaz-liquide dans des microréacteurs capillaires. Dans une première partie, nous avons effectué des essais dans trois microcanaux circulaires en verre placés horizontalement. Les diamètres étudiés étaient de 302, 496 et 916 µm. Les arrivées de gaz et de liquide se font de manière symétrique et forme un angle de 120° entre elles. Une cartographie des écoulements diphasiques gaz-liquide a été systématiquement faite pour des vitesses du liquide comprises entre 0,1 et. 2 m/s et
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Silva, Jaqueline Diniz da. "Estudo teórico-experimental da perda de pressão durante a ebulição convectiva de refrigerantes halogenados no interior de microcanais circulares." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-06112012-170343/.

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A presente dissertação trata de um estudo teórico-experimental sobre a perda de pressão em canais de diâmetro reduzido durante escoamento bifásico de refrigerantes halogenados. Trocadores de calor baseados na ebulição convectiva, em condições de micro-escala são amplamente estudados devido à intensificação da troca de calor proporcionada e a possibilidade de compactação de sistemas de resfriamento. Proporcionam também a redução do inventário de refrigerante e do material utilizado no processo de fabricação do trocador. Porém, o incremento da transferência de calor é acompanhada pelo aumento da
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SU, BO-YU, and 蘇柏瑜. "Magnetohydrodynamic Effect in a Circular Microchannel." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/2aw584.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>107<br>The main purpose of this paper is to investigate the application of a magnetic field to control the flow rate of the solution in the annular microfluidic channel. The annular microchannel used in the experiment includes three slots. The first type consists of an ITO conductive film with 1.20 cm in inner diameter and a graphite carbon electrode with of 0.80 cm in inner diameter to form a channel with 0.20 cm in width. The other two trenches are made up of 0.10 cm and 0.20 cm wide channels made of white gold rings with outer diameters of 1.80 cm, 1.50 cm and 1.
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Wang, Yi-Chung, and 王一忠. "Fabrication of Embedded Circular Microchannel in SU-8." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/57384831388560558462.

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碩士<br>淡江大學<br>機械與機電工程學系<br>91<br>This paper proposes a novel fabrication technique to construct the circular transparent microchannels for hydraulic diameters of 36, 80, and 125μm with smooth channel wall and small average roundness deviation. The microchannels were formulated under low-temperature fabrication process; where the fine radius core of optical fiber was utilized as sacrificial layer and SU-8 transparent negative bone photo-resist was selected as structure layer built by multilayer. Additionally, the low-cost ultraviolet was applied as exposure source to pattern the thin film photo
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Yeh, Chung-Ru, and 葉宗儒. "Experimental Characterization of Flow in a Microchannel with a Circular Cavity and Its Applications to Micromixers." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/69440206888367628588.

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碩士<br>國立成功大學<br>化學工程學系碩博士班<br>93<br>Effective and rapid mixing is essential to microfluidic systems. In this work, a microchannel with a circular cavity is designed for assessing how flows are characterized by microchannel geometries and flow conditions. 　We utilize the PDMS-based microfabrication techniques to construct microchannels. Flow patterns are observed under a microscope with aid of fluorescent particles. The results reveal that the smaller the opening angle of the circular cavity and the width of the microchannel, the more susceptible vortex formation. As long as the opening angle
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Kroeker, Christopher J. "Three-dimensional thermal analysis of heat sinks with circular microchannels." 2003. http://hdl.handle.net/1993/19928.

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Ho, Kuan-Hsuan, and 何官璇. "Fabrication and Cell Culture of Microvessel Scaffold with Circular Cross-section Microchannels." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/37730137964388174243.

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碩士<br>國立中興大學<br>機械工程學系所<br>94<br>One of the continuing, persistent challenges with tissue engineering is the lack of intrinsic blood vessels to transport nutrient and metabolite, thus making it difficult for any implanted cells to obtain sufficient oxygen and nutrients to survive, and/or function properly. It is thus desired to provide the artificial tissues with artificial microvessels. For the published literatures regarding the microvessel scaffold, the soft lithography was the main fabrication technique, resulting microchannels with rectangular cross-section. In general, the real microvess
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Book chapters on the topic "Circular microchannel"

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Shuvo, Abdul Aziz, and A. K. M. Monjur Morshed. "Numerical Investigation of Pulsating Flow Characteristics of Fluid in a Rough Circular Microchannel." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-5183-3_51.

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Gnanaraj, V., and V. Mohan. "Numerical Simulation of Electroosmotic Flow through Circular and Triangular Microchannel with Different Aspect Ratios." In Computational Mechanics. Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-75999-7_49.

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"Transient Electrokinetic Motion of a Circular Particle in a Microchannel." In Electrokinetic Particle Transport in Micro-/Nanofluidics. CRC Press, 2012. http://dx.doi.org/10.1201/b12128-4.

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Rios, Jaime, Mehdi Kabirnajafi, Takele Gameda, Raid Mohammed, and Jiajun Xu. "Convective Heat Transfer of Ethanol/Polyalphaolefin Nanoemulsion in Mini- and Microchannel Heat Exchangers for High Heat Flux Electronics Cooling." In Heat Transfer - Design, Experimentation and Applications [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.96015.

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The present study experimentally and numerically investigates the flow and heat transfer characteristics of a novel nanostructured heat transfer fluid, namely, ethanol/polyalphaolefin nanoemulsion, inside a conventionally manufactured minichannel of circular cross section and a microchannel heat exchanger of rectangular cross section manufactured additively using the Direct Metal Laser Sintering (DMLS) process. The experiments were conducted for single-phase flow of pure polyalphaolefin (PAO) and ethanol/PAO nanoemulsion fluids with two ethanol concentrations of 4 wt% and 8 wt% as well as for two-phase flow boiling of nanoemulsion fluids to study the effect of ethanol nanodroplets on the convective flow and heat transfer characteristics. Furthermore, the effects of flow regime of the working fluids on the heat transfer performance for both the minichannel and microchannel heat exchangers were examined within the laminar and transitional flow regimes. It was found that the ethanol/PAO nanoemulsion fluids can improve convective heat transfer compared to that of the pure PAO base fluid under both single- and two-phase flow regimes. While the concentration of nanoemulsion fluids did not reflect a remarkable distinction in single-phase heat transfer performance within the laminar regime, a significant heat transfer enhancement was observed using the nanoemulsion fluids upon entering the transitional flow regime. The heat transfer enhancement at higher concentrations of nanoemulsion within the transitional regime is mainly attributed to the enhanced interaction and interfacial thermal transport between ethanol nanodroplets and PAO base fluid. For two-phase flow boiling, heat transfer coefficients of ethanol/PAO nanoemulsion fluids were further enhanced when the ethanol nanodroplets underwent phase change. A comparative study on the flow and heat transfer characteristics was also implemented between the traditionally fabricated minichannel and additively manufactured microchannel of similar dimensions using the same working fluid of pure PAO and the same operating conditions. The results revealed that although the DMLS fabricated microchannel posed a higher pressure loss, a substantial heat transfer enhancement was achieved as compared to the minichannel heat exchanger tested under the same conditions. The non-post processed surface of the DMLS manufactured microchannel is likely to be the main contributor to the augmented heat transfer performance. Further studies are required to fully appreciate the possible mechanisms behind this phenomenon as well as the convective heat transfer properties of nanoemulsion fluids.
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Conference papers on the topic "Circular microchannel"

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Agarwal, Akhil, Todd M. Bandhauer, and Srinivas Garimella. "Heat Transfer Model for Condensation in Non-Circular Microchannels." In ASME 2007 5th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2007. http://dx.doi.org/10.1115/icnmm2007-30223.

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A model for predicting heat transfer during condensation of refrigerant R134a in horizontal noncircular microchannels is presented. The thermal amplification technique developed and reported in earlier work by the authors is used to measure condensation heat transfer coefficients for six non-circular microchannels (0.424 &lt; Dh &lt; 0.839 mm) of different shapes over the mass flux range 150 &lt; G &lt; 750 kg/m2-s. The channels included barrel-shaped, N-shaped, rectangular, square, and triangular extruded tubes, and a channel with a W-shaped corrugated insert that yielded triangular microchan
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Chung, Peter M. Y., Masahiro Kawaji, Akimaro Kawahara, and Yuichi Shibata. "Two-Phase Flow Through Square and Circular Microchannels: Effect of Channel Geometry." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45377.

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An adiabatic experiment was conducted to investigate the effect of channel geometry on gas-liquid two-phase flow characteristics in microchannels. A mixture of water and nitrogen gas was pumped through a 96 μm × 96 μm square microchannel and the flow pattern, void fraction and pressure drop data were obtained and compared with those previously obtained in a 100 μm circular microchannel. The frictional pressure drop was determined from the measured total pressure drop, and the two-phase flow pattern and void fraction were determined from image analysis of the video recordings. In the square cha
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Sheen, Jyh-Jong, Kuan-Yi Ho, and Yao-Min Lee. "Three-Dimensional Hydrodynamic Focusing With a Circular Microchannel." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62145.

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We propose a simple method to implement three-dimensional (3D) hydrodynamic focusing with a circular micro-channel for the sample flow. We utilized soft lithography technique and a cylindrical object such as an optical fiber to construct a 3D hydrodynamic focusing master mold made of photoresist and the fiber. The 3D microfluidic focusing device can be duplicated by polydimethylsiloxance (PDMS) casting. When peeling the PDMS cast from the master, there is a crack along the circular channel. However, this crack can be recovered from the thermal bonding of the PDMS cast and a PDMS substrate. We
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Tian, Yitu, and Haiwang Li. "An Experimental Investigation on Flow Behavior and Heat Transfer Affected by Roughness in the Circular Micro-Channels." In ASME 2016 5th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/mnhmt2016-6612.

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Surface roughness is one of the most important factors to determine the flow and heat transfer characteristics of the microchannel. This paper experimentally and theoretically investigated the effects of surface roughness for the flow and heat transfer behavior within the circular microchannel. The stainless steel circular microchannels were fabricated by electrical spark-erosion perforating and drilling separately to control the relative roughness of the surface which is 1% for drilling method and 1.5% for electrical spark-erosion perforating method. Each test piece includes 44 identical circ
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Agarwal, Akhil, and Srinivas Garimella. "Modeling of Pressure Drop During Condensation in Circular and Non-Circular Microchannels." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14672.

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This paper presents a multiple flow-regime model for pressure drop during condensation of refrigerant R134a in horizontal microchannels. Condensation pressure drops measured in two circular and six non-circular channels ranging in hydraulic diameter from 0.42 mm to 0.8 mm are considered here. For each tube under consideration, pressure drop measurements were taken over the entire range of qualities from 100% vapor to 100% liquid for five different refrigerant mass fluxes between 150 kg/m2-s and 750 kg/m2-s. Results from previous work by the authors on condensation flow mechanisms in microchann
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Kawaji, M., and P. M. Y. Chung. "Unique Characteristics of Adiabatic Gas-Liquid Flows in Microchannels: Diameter and Shape Effects on Flow Patterns, Void Fraction and Pressure Drop." In ASME 2003 1st International Conference on Microchannels and Minichannels. ASMEDC, 2003. http://dx.doi.org/10.1115/icmm2003-1013.

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Microfluidics is a rapidly developing area of research with great potential for a wide range of applications in many fields. One area of microfluidics is gas-liquid two-phase flow in microchannels, which is important for the development of microreactors, lab-on-a-chip systems, micro heat exchangers and micro-heat pipes, among others, that are highly relevant to industry. Recently, much interest has also been shown toward studying the two-phase flow in micro fuel cells. This keynote paper presents a state-of-the-art review of past and present research on adiabatic two-phase flow in minichannels
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Jafari, Arash, Normah Mohd Ghazali, M. A. Wahid, S. Samion, N. A. C. Sidik, and J. M. Sheriff. "Optimization of a Circular Microchannel With Entropy Generation Minimization Method." In THE 10TH ASIAN INTERNATIONAL CONFERENCE ON FLUID MACHINERY. AIP, 2010. http://dx.doi.org/10.1063/1.3464878.

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Su, Qian, Guang Xu Yu, Hua Sheng Wang, and John W. Rose. "Correlations and Theory for Microchannel Condensation." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62146.

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In recent years several correlations have been proposed for calculating the heat-transfer coefficient during condensation in circular and non-circular channels of typical dimension around 1 mm where surface tension effects are important and correlations for larger diameter channels are inappropriate. A wholly theoretical approach applicable to annular flow has also been proposed. The correlations are all based on data for R134a, while the theory is applicable to any fluid. In this paper comparisons are made between the correlations for R134a and ammonia; plots based on theory are also included
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Duan, Zhipeng, and Y. S. Muzychka. "Models for Gaseous Slip Flow in Non-Circular Microchannels." In ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/ht2007-32191.

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Micro-scale fluid dynamics has received intensive interest due to the emergence of Micro-Electro-Mechanical Systems (MEMS) technology. Non-circular cross sections are common channel shapes that can be produced through a variety of micro-fabrication techniques. Non-circular microchannels have extensive practical applications in MEMS. Slip flow in noncircular microchannels has been examined by the authors and a review of several new models obtained by the authors is presented. These models are general and robust, and can be used by the research community for practical engineering design of micro
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Hernandez, Joseph E., and Jeffrey S. Allen. "Spontaneous Liquid-Liquid Slug Flow in Microchannels." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15529.

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Spontaneous liquid-liquid slug (bislug) flow in microchannels has been observed for both circular and square cross sections. Flow is induced via an imbalance in interfacial tensions and curvatures between the two gas-liquid surfaces and the liquid-liquid surface. Bislug flow in square cross-section microchannels is generally much quicker than bislug flow in circular capillaries for a variety of reasons; including the self-wetting nature of the microchannel and the decrease in viscous resistance in the corners.
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