scholarly journals Experimental characterization of water flow through smooth rectangular microchannels

2005 ◽  
Vol 17 (9) ◽  
pp. 098105 ◽  
Author(s):  
R. Baviere ◽  
F. Ayela ◽  
S. Le Person ◽  
M. Favre-Marinet
Keyword(s):  
Water Flow ◽  
Experimental Characterization ◽  
Rectangular Microchannels ◽  
Flow Through

Experimental Characterization of Two-Phase Flow Through Valves Applied to Liquid-Assisted Gas-Lift

2020 ◽  
Vol 142 (6) ◽  
Author(s):  
Renato P. Coutinho ◽  
Paulo J. Waltrich ◽  
Wesley C. Williams ◽  
Parviz Mehdizadeh ◽  
Stuart Scott ◽  
...  
Keyword(s):  
Water Flow ◽  
Two Phase Flow ◽  
Numerical Study ◽  
Water Flow Rate ◽  
Phase Flow ◽  
Experimental Characterization ◽  
Two Phase ◽  
Flow Through ◽  
Gas Lift

Abstract Liquid-assisted gas-lift (LAGL) is a recently developed concept to unload wells using a gas–liquid fluid mixture. The success deployment of the LAGL technology is related to the behavior of two-phase flow through gas-lift valves. For this reason, this work presents an experimental and numerical study on two-phase flow through orifice gas-lift valves used in liquid-assisted gas-lift unloading. To the knowledge of the authors, there is no investigation in the literature on experimental characterization of two-phase flow through gas-lift valves. Experimental data are presented for methane-water flow through gas-lift valves with different orifice port sizes: 12.7 and 17.5 mm. The experiments were performed for pressures ranging from 1.00 to 9.00 MPa, gas flow rates from 0 to 4.71 m3/h, and water flow rate from 0 to 0.68 m3/min. The experimental results are compared to numerical models published in the literature for two-phase flow through restrictions and to commercial multiphase flow simulators. It is observed that some models developed for two-phase flow through restrictions could successfully characterize two-phase flow thorough gas-lift valves with errors lower than 10%. However, it is first necessary to experimentally determine the discharge coefficient (CD) for each gas-lift valve. The commercial flow simulators showed a similar performance as the models available in the literature.

Characterization of the water flow through concrete based on parameter estimation from infiltration tests

2006 ◽  
Vol 36 (9) ◽  
pp. 1575-1582 ◽  
Author(s):  
Vicente Navarro ◽  
Ángel Yustres ◽  
Luís Cea ◽  
Miguel Candel ◽  
Ricardo Juncosa ◽  
...  
Keyword(s):  
Parameter Estimation ◽  
Water Flow ◽  
Flow Through ◽  
Infiltration Tests

Experimental characterization of single and two-phase flow through nickel foams

2009 ◽  
Vol 64 (19) ◽  
pp. 4186-4195 ◽  
Author(s):  
Odile Gerbaux ◽  
Thibaut Vercueil ◽  
Alain Memponteil ◽  
Bruno Bador
Keyword(s):  
Two Phase Flow ◽  
Phase Flow ◽  
Experimental Characterization ◽  
Two Phase ◽  
Nickel Foams ◽  
Flow Through

Experimental Characterization of Pressure Loss Caused by Flow Through Foldcore Sandwich Structures

2017 ◽  
Author(s):  
Yves Klett ◽  
Carla Zeger ◽  
Peter Middendorf
Keyword(s):  
Cross Section ◽  
Pressure Loss ◽  
Fluid Transport ◽  
Mechanical Performance ◽  
Experimental Characterization ◽  
Large Cross Section ◽  
Flow Through ◽  
Folded Structures ◽  
Sandwich Core

Folded structures based on different tessellation types have been investigated as alternatives to conventional sandwich core materials like honeycombs and foams. Besides the mechanical performance offered by such foldcores, they feature some unique properties that can be used to integrate additional functionalities. One of these is the possibility to generate large cross-section channels within the sandwich core that can be used for gas and fluid transport. In this study, we present an experimental setup to measure pressure loss within foldcore sandwich panels, and compare results for seven different foldcore configurations.

Experimental Characterization of the Transient Response of Air/Water Crossflow Heat Exchangers for Data Center Cooling Systems

2015 ◽  
Author(s):  
Marcelo del Valle ◽  
Alfonso Ortega
Keyword(s):  
Heat Exchanger ◽  
Water Flow ◽  
Transient Response ◽  
Data Center ◽  
Heat Exchangers ◽  
The Other ◽  
Experimental Characterization ◽  
Cooling Systems ◽  
Hybrid Cooling

Data Center hybrid air/liquid cooling systems such as rear door heat exchangers, overhead and in row cooling systems enable localized, on-demand cooling, or “smart cooling.” At the heart of all hybrid cooling systems is an air to liquid cross flow heat exchanger that regulates the amount of cooling delivered by the system by modulating the liquid or air flows and/or temperatures. Due the central role that the heat exchanger plays in the system response, understanding the transient response of the heat exchanger is crucial for the precise control of hybrid cooling system. This paper reports on the transient experimental characterization of heat exchangers used in data centers applications. An experimental rig designed to introduce controlled transient perturbations in temperature and flow on the inlet air and liquid flow streams of a 12 in. × 12 in. heat exchanger test core is discussed. The conditioned air is delivered to the test core by a suction wind tunnel with upstream air heaters and a frequency variable axial blower to allow the control of air flow rate and bulk temperature. The conditioned water is delivered to the test core by a water delivery system consisting of two separate water circuits, one delivering cold water, and the other hot water. By switching from one circuit to the other or mixing water from both circuits, the rig is capable of generating step, ramp and frequency perturbations in water temperature at constant flow or step, ramp or frequency perturbations in water flow at constant temperature or combinations of temperature and water flow perturbations. Experimental data are presented for a 12×12 heat exchanger core with a single liquid pass under different transient perturbations.

Characterization of frictional pressure drop of liquid flow through curved rectangular microchannels

2012 ◽  
Vol 38 ◽  
pp. 171-183 ◽  
Author(s):  
Jiann-Cherng Chu ◽  
Jyh-Tong Teng ◽  
Ting-ting Xu ◽  
Suyi Huang ◽  
Shiping Jin ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Liquid Flow ◽  
Rectangular Microchannels ◽  
Frictional Pressure Drop ◽  
Flow Through

Experimental Characterization of Aerosol Flow Through a Micro-Capillary

2010 ◽  
Author(s):  
Zakaria Mahmud ◽  
Justin M. Hoey ◽  
Artur Lutfurakhmanov ◽  
Jason Daugs ◽  
Orven F. Swenson ◽  
...  
Keyword(s):  
Coming Out ◽  
Experimental Validation ◽  
Direct Write ◽  
Particle Sizing ◽  
Experimental Characterization ◽  
Small Particles ◽  
Aerosol Flow ◽  
Geometric Convergence ◽  
Flow Through

Aerosol flow through a long and tapered micro-capillary (MC) for direct write (DW) technology is typically used with small particles of sizes ranging from 0.2 μm to 10 μm at velocities up to 100 m/s. Earlier research showed that the particles coming through a long MC experience Saffman force that moves the particles towards the center of the beam other than the geometric convergence (due to Stokes drag); thus creating a collimated aerosol beam. It was also established that the additional Saffman force becomes more effective with certain particle diameters and velocities. Therefore, for experimental validation, it is important to accurately measure the particle size distribution and velocities coming out of the long MC. However, the current sizing methods are incapable of measuring particles less than 5 μm due to optical limitations. The current paper presents results using a micro-shadowgraphy system from LaVision Inc. to characterize the flow field. A modification of the particle-sizing algorithm is proposed to measure particles of sub-micron sizes. The modified algorithm can be used to accurately size particles of 1μm diameter.

Experimental Characterization of a Flow-through Pulsation Damper Regarding Pressure Pulsations and Vibrations

2016 ◽  
Vol 40 (1) ◽  
pp. 162-169 ◽  
Author(s):  
Andreas F. Koegler ◽  
Daniel Haselmann ◽  
Nicolas S. A. Alt ◽  
Eberhard Schluecker
Keyword(s):  
Experimental Characterization ◽  
Pressure Pulsations ◽  
Flow Through

Flow Distribution in Flat Solar Collectors Systems Interconnected

2012 ◽  
Author(s):  
C. O. Ríos Orozco ◽  
N. C. Uzarraga-Rodriguez ◽  
A. Gallegos-Muñoz ◽  
J. M. Riesco Ávila
Keyword(s):  
Friction Coefficient ◽  
Pressure Drop ◽  
Water Flow ◽  
Solar Collector ◽  
Flow Distribution ◽  
Solar Collectors ◽  
Hydraulic Analysis ◽  
Hydraulic Behavior ◽  
Flow Through

In this work the characterization of the water flow through a flat solar collector and solar collectors systems interconnected is presented. This allows analyzing the behavior of flow distribution in the headers pipe and riser tubes of flat solar collectors. The hydraulic analysis allows determining if the water flow inside the risers presents a no-uniform distribution, having that the mass flow rate through riser tubes increases when they are located a greater distance from inlet of header pipe. This effect also occurs at system composed of several solar collectors interconnected, through their own header pipes, which behaves like a simple flat solar collector with header pipe longer and major number of riser tubes. The hydraulic model of the water flow through a flat solar collector, equipped with different number of riser tubes, is modeled in the FLUENT® software and comparing with theory and methodology knowing for the calculation of pressure drop in pipe sections and accessories. The results show the curves obtained for hydraulic behavior for the cases of study, where is observed that the water flow is no-uniform. This no uniformity provokes that the friction coefficient varies depending of the position of riser tube.

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