Review of fabrication of nanochannels for single phase liquid flow

2005 ◽  
Vol 2 (3) ◽  
pp. 185-193 ◽  
Author(s):  
Jeffrey L. Perry ◽  
Satish G. Kandlikar
Keyword(s):  
Liquid Flow ◽  
Single Phase ◽  
Phase Liquid ◽  
Single Phase Liquid Flow

Investigation of the Effects of Completion Geometry on Single-Phase Liquid Flow Behavior in Horizontal Wells

2000 ◽  
Vol 123 (2) ◽  
pp. 119-126 ◽  
Author(s):  
Weipeng Jiang ◽  
Cem Sarica ◽  
Erdal Ozkan ◽  
Mohan Kelkar
Keyword(s):  
Liquid Flow ◽  
Horizontal Well ◽  
Single Phase ◽  
Flow Behavior ◽  
Horizontal Wells ◽  
Main Flow ◽  
Test Facility ◽  
Small Scale ◽  
Phase Liquid ◽  
Single Phase Liquid Flow

The fluids in horizontal wells can exhibit complicated flow behaviors, in part due to interaction between the main flow and the influxes along the wellbore, and due to completion geometries. An existing small-scale test facility at Tulsa University Fluid Flow Projects (TUFFP) was used to simulate the flow in a horizontal well completed with either circular perforations or slotted liners. Single phase liquid flow experiments were conducted with Reynolds numbers ranging approximately from 5000 to 65,000 and influx to main flow rate ratios ranging from 1/50 to 1/1000. For both the perforation and slot cases, three different completion densities and three different completion phasings are considered. Based on the experimental data, new friction factor correlations for horizontal well with multiple perforation completion or multiple slots completion were developed using the principles of conservation of mass and momentum.

Friction Losses and Heat Transfer in Laminar Microchannel Single-Phase Liquid Flow

2008 ◽  
Author(s):  
Vaˆnia Silve´rio ◽  
Anto´nio L. N. Moreira
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Liquid Flow ◽  
Single Phase ◽  
Wall Heat Flux ◽  
Oxide Thin Film ◽  
Flow Conditions ◽  
Constant Wall Heat Flux ◽  
Phase Liquid ◽  
Single Phase Liquid Flow

Many studies addressed the validity of macroscale theories to describe momentum and heat transfer in single phase in microtubes, but the results are often inconsistent. It is suggested that the fluid flow and heat transfer in microchannels without phase change is substantially different from that in larger channels. However, these discrepancies may be attributed to experimental uncertainties mainly due to the use of conventional measurement apparatus that are too big to implement in the tested system. Other researchers explain the microfluidic behavior with the ratio of surface forces to body forces which evolve inversely to the hydraulic diameter. The present work considers the use of a dedicated experimental facility built to allow the use of optical diagnostic and flow visualization techniques in heated microtubes and addresses the potential microscale effects which may arise for single phase flow conditions. The experiments encompass measurements of the pressure drop and the longitudinal temperature distribution in the fully developed single phase liquid flow established in circular and square cross section of channels made of borosilicate glass with hydraulic diameters from 50μm up to 500μm. The flow conditions consider a range of Reynolds number from 10 up to around 2500 and the use of diverse fluids to account for the effects of liquid properties. Namely, three distinct fluids were used: distilled water, methoxy-nonafluorobutane and methanol. For heat transfer studies, the channels are heated with constant wall heat flux supplied by Joule effect by means of external wall rf-PERTE deposition of Indium Oxide thin film. The thin transparent film showed good chemical stability in the range of temperatures up to 70°C, therefore indicating that the thermal boundary condition approximates a constant wall heat flux condition. The mass flux is varied from 60 to 3300kg.m−2·s−1 and the heat flux was set between 4 and 6kW.m−2. Experimental uncertainties are estimated to be below 14% for the friction factor and below 24% for Nusselt number; the former is dominated by inaccuracies in the diameter, while the second is dominated by temperature measurements.

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