Experimental study on two-phase flow and pressure drop in millimeter-size channels

Pehlivan, K.; Hassan, Ibrahim; Vaillancourt, M.

doi:10.1016/j.applthermaleng.2005.12.010

Cited by 48 publications

(22 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Pehlivan [1] made experimental investigations of the pressure drop of two-phase flow of water-air in channels with a circular section with an internal diameter of 3, 1 and 0.8 mm. In the part concerning pressure drop of single-phase flow, he confirmed both for water and air a compliance of Poiseuille conventional theory for laminar flow and Blasisus theory for turbulent flow with the experimental results for minichannels.…”

Section: Studies Of Single-phase Flow In Minichannelsmentioning

confidence: 99%

Experimental investigations of Poiseuille number laminar flow of water and air in minichannels

Dutkowski

2008

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

Section: Studies Of Single-phase Flow In Minichannelsmentioning

confidence: 99%

Experimental investigations of Poiseuille number laminar flow of water and air in minichannels

Dutkowski

2008

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

“…Bubbly, slug, churn, slug-annular, and annular flows were observed for channels of hydraulic diameters 250 and 530 m. Pehlivan et al (2006) investigated the pressure drop and flow regimes in 3, 1, and 800 m diameter tubes using air and water as two-phase fluids. They classified the flow regimes into inertia and surface-dominated zones.…”

Section: Introductionmentioning

confidence: 99%

Effect of tube diameter on two‐phase flow patterns in mini tubes

2010

View full text Add to dashboard Cite

The effect of tube diameter on two-phase flow patterns was investigated in circular tubes with inner diameters of 0.6, 1.2, 1.7, 2.6, and 3.4 mm using air and water. The gas and liquid superficial velocity ranges were 0.01-50 and 0.01-3 m/s, respectively. The gas and liquid flow rates were measured and the two-phase flow pattern images were recorded using high-speed CMOS camera. The flow patterns observed were dispersed bubbly, bubbly, slug, slug-annular, wavy-annular, stratified, and annular flows. These flow patterns were not observed in all the test diameters, but were found to be unique to particular tube diameters, confirming the effect of tube diameter on the flow pattern. The data obtained were compared to existing experimental data and flow regime transition maps which show generally reasonable overall agreement at the larger diameters, but significant differences were observed with the smaller diameter tubes.

show abstract

“…Even though apparently better heat transfer characteristics of microchannel heat exchangers exist, microchannel heat exchangers are not commonly used in residential air-conditioning systems because round tube plate fin (RTPF) heat exchangers have a cost advantage, which is one of the most critical factors of commercial products (Park and Hrnjak 2008). The flow regimes observed during an experiment in the microchannels are dependent on several factors, such as flow rates, properties of the fluids used, channel inclination with respect to the horizontal, as well as channel geometry and size (Pehlivan et al 2006). Classification of micro channels based on fixed channel hydraulic diameters is as follows: microchannels (1-100 lm), mesochannels (100-1000 lm), macro-channels (1-6 mm) and conventional channels ([6 mm) (Wei and Zan 2010).…”

Section: Refrigerant Charge Reduction Techniquesmentioning

confidence: 99%

Alternative refrigerants in vapour compression refrigeration cycle for sustainable environment: a review of recent research

Bhatkar

Kriplani

Awari³

2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

Vapour compression refrigeration is used in almost 80 % of the refrigeration industries in the world for refrigeration, heating, ventilating and air conditioning. The high-grade energy consumption of these devices is very high and the working substance creates environmental problems due to environmental unfriendly refrigerants such as chloroflurocarbons, hydrochloroflurocarbons and hydroflurocarbons. Heating, ventilating, air conditioning and refrigeration industries are searching for ways to increase performance, durability of equipments and energy efficiency in a sustainable way while reducing the cost of manufacturing. With the present refrigerants, environmental problems such as ozone layer depletion, global warming potential, green house gases and carbon emission are increasing day by day. In this paper, the popular refrigerant is thoroughly studied experimentally and recommendations are given for alternatives such as carbon dioxide, ammonia and hydrocarbons and new artificially created fluid, HydroFluoro-Olefin 1234yf by DuPont and Honeywell which exhibit good thermo-physical and environmental properties and will be commercialized in the near future.

show abstract

Experimental study on two-phase flow and pressure drop in millimeter-size channels

Cited by 48 publications

References 11 publications

Experimental investigations of Poiseuille number laminar flow of water and air in minichannels

Experimental investigations of Poiseuille number laminar flow of water and air in minichannels

Effect of tube diameter on two‐phase flow patterns in mini tubes

Alternative refrigerants in vapour compression refrigeration cycle for sustainable environment: a review of recent research

Contact Info

Product

Resources

About