Pressure Drop of Fully-Developed, Laminar Flow in Microchannels of Arbitrary Cross-Section

Bahrami, Majid; Yovanovich, M. M.; Culham, J. R.

doi:10.1115/1.2234786

Cited by 165 publications

(64 citation statements)

References 9 publications

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“…The wall contribution is estimated by the method of Bahrami et al [39] who proposed an analytical solution of friction factor for fully developed laminar flow in a micro channel with any cross-section. Applied to our reactor design (aspect ratio = 1), it gives (Eq.…”

Section: Liquid Phase Pressure Dropmentioning

confidence: 99%

Milli-channel with metal foams under an applied gas–liquid periodic flow: External mass transfer performance and pressure drop

Tourvieille

Philippe

Bellefon

2015

Chemical Engineering Journal

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Section: Liquid Phase Pressure Dropmentioning

confidence: 99%

Milli-channel with metal foams under an applied gas–liquid periodic flow: External mass transfer performance and pressure drop

Tourvieille

Philippe

Bellefon

2015

Chemical Engineering Journal

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“…Bahrami et al (2005a) developed an analytical method for estimation of frictional resistance for fully developed laminar flow in rough microchannels based on a Gaussian isotropic distribution for roughness. In their further work (Bahrami et al 2005b), they have developed an expression for friction factor in microchannels of arbitrary cross-section. The proposed expression is in terms of geometric parameters such as area, perimeter and polar moment of inertia.…”

mentioning

confidence: 99%

Numerical simulation of flow through microchannels with designed roughness

Rawool

Mitra

Kandlikar

2005

Microfluid Nanofluid

124

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A three-dimensional numerical simulation of flow through serpentine microchannels with designed roughness in form of obstructions placed along the channels walls is conducted here. CFD-ACE+ is used for the numerical simulations. The effect of the roughness height (surface roughness), geometry, Reynolds number on the friction factor is investigated. It is found that the friction factor increases in a nonlinear fashion with the increase in obstruction height. The friction factor is more for rectangular and triangular obstructions and it decreases as the obstruction geometry is changed to trapezoidal. It is observed that the obstruction geometry, i.e., aspect ratio plays an important role in prediction of friction factor in rough channels. It is also found that the pressure drop decreases with the increase in the roughness pitch. Hence, the roughness pitch is an important design parameter for microchannels.

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“…[1][2][3] Microchannels are essential parts of such systems and are exploited as micro-heat exchangers, microbioreactors, concentrators, mixers, and separators. [4][5][6][7] As alternative materials from the a) Author to whom correspondence should be addressed. Electronic mail: chemnet75@korea.kr.…”

Section: Introductionmentioning

confidence: 99%

Deformation properties between fluid and periodic circular obstacles in polydimethylsiloxane microchannels: Experimental and numerical investigations under various conditions

2013

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Understanding the mechanical properties of optically transparent polydimethylsiloxane (PDMS) microchannels was essential to the design of polymer-based microdevices. In this experiment, PDMS microchannels were filled with a 100 lM solution of rhodamine 6G dye at very low Reynolds numbers ($10 À3 ). The deformation of PDMS microchannels created by pressure-driven flow was investigated by fluorescence microscopy and quantified the deformation by the linear relationship between dye layer thickness and intensity. A line scan across the channel determined the microchannel deformation at several channel positions. Scaling analysis widely used to justify PDMS bulging approximation was allowed when the applied flow rate was as high as 2.0 ll/min. The three physical parameters (i.e., flow rate, PDMS wall thickness, and mixing ratio) and the design parameter (i.e., channel aspect ratio ¼ channel height/channel width) were considered as critical parameters and provided the different features of pressure distributions within polymer-based microchannel devices. The investigations of the four parameters performed on flexible materials were carried out by comparison of experiment and finite element method (FEM) results. The measured Young's modulus from PDMS tensile test specimens at various circumstances provided reliable results for the finite element method. A thin channel wall, less cross-linker, high flow rate, and low aspect ratio microchannel were inclined to have a significant PDMS bulging. Among them, various mixing ratios related to material property and aspect ratios were one of the significant factors to determine PDMS bulging properties. The measured deformations were larger than the numerical simulation but were within corresponding values predicted by the finite element method in most cases. V C 2013 AIP Publishing LLC. [http://dx

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Pressure Drop of Fully-Developed, Laminar Flow in Microchannels of Arbitrary Cross-Section

Cited by 165 publications

References 9 publications

Milli-channel with metal foams under an applied gas–liquid periodic flow: External mass transfer performance and pressure drop

Milli-channel with metal foams under an applied gas–liquid periodic flow: External mass transfer performance and pressure drop

Numerical simulation of flow through microchannels with designed roughness

Deformation properties between fluid and periodic circular obstacles in polydimethylsiloxane microchannels: Experimental and numerical investigations under various conditions

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