Influence of wall conditions on friction factor for flow of gases under slip condition

Demsis, Anwar; Prabhu, S.V.; Agrawal, Amit

doi:10.1016/j.expthermflusci.2010.07.008

Cited by 28 publications

(5 citation statements)

References 29 publications

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“…Therefore, the measurement of TMAC itself is important and valuable. Recently, stainless steel was studied by Marino (2009) with a bundle of tubes and by Varoutis et al (2009), Demsis et al (2010 under rarefied gas flows. However, the measurement on various materials is required for farther investigation of TMAC, and the measurement on several reported materials for the validation of the technique from comparison with other results is also required.…”

Section: Introductionmentioning

confidence: 99%

Experimental measurement on tangential momentum accommodation coefficient in a single microtube

Yamaguchi

Hanawa

Yamamoto

et al. 2011

Microfluid Nanofluid

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The tangential momentum accommodation coefficient (TMAC) was investigated experimentally from the mass flow rate through a single microtube under the slip flow and the early part of the transition regime. The measurements were carried out by the constant-volume method under the mean Knudsen number smaller than 0.3, which is based on the mean pressure of the inlet and the outlet of the microtube, to apply the second-order slip boundary condition. To measure TMACs on various materials, quite large microtube was employed, which require the reduction in leakage. TMAC was obtained from the slip coefficient determined by the relation of the mass flow rate to the mean Knudsen number. The obtained mass flow rate was well explained by the theoretical equation. TMACs of deactivated-fused silica with argon, nitrogen, and oxygen were measured, showing the tangential momentum was not accommodated completely to the surface, and the values showed good agreement with previous studies. From the comparison between microtubes with different inner diameter, it is showed that TMAC is determined mainly by gas species and surface material.

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Section: Introductionmentioning

confidence: 99%

Experimental measurement on tangential momentum accommodation coefficient in a single microtube

Yamaguchi

Hanawa

Yamamoto

et al. 2011

Microfluid Nanofluid

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“…Thereafter, experiments for diverging microchannel are carried out. The setup leakage testing is performed using the procedure reported in Demsis et al [15]. The leakage is ensured to be less than 2% of the mass flow rate employed in the measurements.…”

Section: Methodsmentioning

confidence: 99%

“…Most of the earlier work however focused on uniform cross-section microchannels with liquid or gas flow [1][2][3][4][5][6][7][8][9][10][11][12] and flow through other cross-section area microchannels have been inadequately studied. The low pressure gas flows through conventional tubes are governed by the same set of non-dimensional parameters as that of gas microflow; Sreekanth [13] and Demsis et al [14,15]. A comprehensive review on gas flow in microchannel was reported by Agrawal [16].…”

Section: Introductionmentioning

confidence: 98%

Low Mach number slip flow through diverging microchannel

et al. 2015

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“…Demsis et al 19 experimentally analyzed the friction factor in gas flows with slip velocity boundary conditions, emphasizing the influence of several parameters such as pipe material, pipe wall roughness, and channel geometry for various gases like nitrogen, oxygen, and argon. They found that the change in gas or pipe diameter has minimal influence on the friction factor.…”

Section: Previous Workmentioning

confidence: 99%

“…Subsequently, with the advent of several other slip models which are valid at macroscale, many experimental and theoretical studies on the effect of slip velocity at both micro‐ and macroscopic levels are dedicated on flow through pipes, channels, annulus, etc. 8–21. However, analogous results with slip effects when the solid surface is spherical are very scant and are mostly restricted to the zero Reynolds number regime 22–35 except the works of Meigounpoory et al 36, Atefi et al 37, and Kishore and Ramteke 38.…”

Section: Introductionmentioning

confidence: 99%

Slip in Flow through Assemblages of Spherical Particles at Low to Moderate Reynolds Numbers

Kishore

Ramteke

2016

Chem Eng & Technol

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Effects of slip velocity and volume fraction of slip spheres on the momentum transfer characteristics of assemblages of slip spheres are numerically investigated. The fluid slip along the surface of the sphere is considered by Navier's linear slip model. The dimensionless governing continuity and momentum equations are solved using a semi-implicit marker and cell method implemented on a staggered grid arrangement in spherical coordinates. The convection and viscous terms of momentum equations are discretized by means of the QUICK scheme and a second-order central differencing scheme, respectively. The present numerical solver is benchmarked via grid independence and comparisons with the existing literature values. Results were obtained over a wide range of pertinent dimensionless numbers such as the Reynolds number, volume fraction of the dispersed phase, and dimensionless slip parameter.

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Influence of wall conditions on friction factor for flow of gases under slip condition

Cited by 28 publications

References 29 publications

Experimental measurement on tangential momentum accommodation coefficient in a single microtube

Experimental measurement on tangential momentum accommodation coefficient in a single microtube

Low Mach number slip flow through diverging microchannel

Slip in Flow through Assemblages of Spherical Particles at Low to Moderate Reynolds Numbers

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