Micro-orifice single-phase liquid flow: Pressure drop measurements and prediction

Andrea Cioncolini; Fabio Scenini; Jonathan Duff

doi:10.1016/j.expthermflusci.2015.03.005

Micro-orifice single-phase liquid flow: Pressure drop measurements and prediction

Andrea Cioncolini, Fabio Scenini^*, Jonathan Duff

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

The dimensionless pressure drop was measured for six micro-orifices with diameters of 150. μm, 300. μm and 600. μm, and thickness ratios between 1.87 and 6.93. The experiments were carried out with water for orifice Reynolds number between 6000 and 25,000, thus extending the range covered in previous researches in turbulent flow conditions. The dimensionless pressure drop was found to be a weak decreasing function of the Reynolds number, and was found to be unaffected by the micro-orifice diameter ratio or thickness ratio. The static pressure profiles measured immediately downstream of the micro-orifices were flat, indicating that the vena contracta is located within the micro-orifice. A new prediction method for the dimensionless pressure drop in micro-orifices at high Reynolds number was developed using available data.

Original language	English
Pages (from-to)	33-40
Number of pages	8
Journal	Experimental Thermal and Fluid Science
Volume	65
DOIs	https://doi.org/10.1016/j.expthermflusci.2015.03.005
State	Published - 1 Jul 2015
Externally published	Yes

Keywords

Dimensionless pressure drop
Discharge
Micro-fluidics
Micro-orifice
Resistance coefficient

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10.1016/j.expthermflusci.2015.03.005

Cite this

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title = "Micro-orifice single-phase liquid flow: Pressure drop measurements and prediction",

abstract = "The dimensionless pressure drop was measured for six micro-orifices with diameters of 150. μm, 300. μm and 600. μm, and thickness ratios between 1.87 and 6.93. The experiments were carried out with water for orifice Reynolds number between 6000 and 25,000, thus extending the range covered in previous researches in turbulent flow conditions. The dimensionless pressure drop was found to be a weak decreasing function of the Reynolds number, and was found to be unaffected by the micro-orifice diameter ratio or thickness ratio. The static pressure profiles measured immediately downstream of the micro-orifices were flat, indicating that the vena contracta is located within the micro-orifice. A new prediction method for the dimensionless pressure drop in micro-orifices at high Reynolds number was developed using available data.",

keywords = "Dimensionless pressure drop, Discharge, Micro-fluidics, Micro-orifice, Resistance coefficient",

author = "Andrea Cioncolini and Fabio Scenini and Jonathan Duff",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Inc.",

year = "2015",

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doi = "10.1016/j.expthermflusci.2015.03.005",

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TY - JOUR

T1 - Micro-orifice single-phase liquid flow

T2 - Pressure drop measurements and prediction

AU - Cioncolini, Andrea

AU - Scenini, Fabio

AU - Duff, Jonathan

PY - 2015/7/1

Y1 - 2015/7/1

N2 - The dimensionless pressure drop was measured for six micro-orifices with diameters of 150. μm, 300. μm and 600. μm, and thickness ratios between 1.87 and 6.93. The experiments were carried out with water for orifice Reynolds number between 6000 and 25,000, thus extending the range covered in previous researches in turbulent flow conditions. The dimensionless pressure drop was found to be a weak decreasing function of the Reynolds number, and was found to be unaffected by the micro-orifice diameter ratio or thickness ratio. The static pressure profiles measured immediately downstream of the micro-orifices were flat, indicating that the vena contracta is located within the micro-orifice. A new prediction method for the dimensionless pressure drop in micro-orifices at high Reynolds number was developed using available data.

AB - The dimensionless pressure drop was measured for six micro-orifices with diameters of 150. μm, 300. μm and 600. μm, and thickness ratios between 1.87 and 6.93. The experiments were carried out with water for orifice Reynolds number between 6000 and 25,000, thus extending the range covered in previous researches in turbulent flow conditions. The dimensionless pressure drop was found to be a weak decreasing function of the Reynolds number, and was found to be unaffected by the micro-orifice diameter ratio or thickness ratio. The static pressure profiles measured immediately downstream of the micro-orifices were flat, indicating that the vena contracta is located within the micro-orifice. A new prediction method for the dimensionless pressure drop in micro-orifices at high Reynolds number was developed using available data.

KW - Dimensionless pressure drop

KW - Discharge

KW - Micro-fluidics

KW - Micro-orifice

KW - Resistance coefficient

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U2 - 10.1016/j.expthermflusci.2015.03.005

DO - 10.1016/j.expthermflusci.2015.03.005

M3 - 文章

AN - SCOPUS:84924940498

SN - 0894-1777

VL - 65

SP - 33

EP - 40

JO - Experimental Thermal and Fluid Science

JF - Experimental Thermal and Fluid Science

ER -

Micro-orifice single-phase liquid flow: Pressure drop measurements and prediction

Abstract

Keywords

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