An Experimental Study on Two Phase (Air-Water) Flow Characteristics in a Horizontal Pipe at Atmospheric Conditions

The runback water flow and heat transfer on the surface of aircraft components has an important influence on the design of anti-icing system. The aim of this paper is to investigate the water flow characteristics on anti-icing surface using numerical method. The runback water flow on the anti-icing surface, which is caused by the impinging supercooled droplets from the clouds, is driven by the aerodynamic shear forces and the pressure gradient around the components. This is a complex model of flow and heat transfer that considers flow field, super-cooled droplets impingement and runback water flow simultaneously. In this case of gas-liquid two phase flow, the Volume-of-Fluid (VOF) method is very suitable for the solution of thin liquid film flow so that it is applied to simulate the runback water flow on anti-icing surfaces in this paper. Meanwhile, the heat and mass transfer of the runback water flow are considered in the calculation using the User-Defined Functions (UDFs) in ANASYS FLUENT. The verification is conducted by the comparison with the results of the experimental measurement and the mathematical model calculation. The effect of the airflow velocity and contact angle on the water flow are also considered in the numerical simulation.

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Research on the Pneumatic Conveying of the Sand in the Horizontal Pipe Based on FLUENT

Chemical Product and Process Modeling ◽

10.1515/cppm-2015-0039 ◽

2016 ◽

Vol 11 (2) ◽

pp. 159-165 ◽

Cited By ~ 1

Author(s):

Dan-yang Li ◽

Shu Liu ◽

Xiao-ning Wang

Keyword(s):

Particle Diameter ◽

Flow Characteristics ◽

Axial Direction ◽

Theoretical Research ◽

Pneumatic Conveying ◽

Two Phase ◽

Horizontal Pipe ◽

Actual Measurement ◽

Fluid Analysis ◽

Euler Model

Abstract The pneumatic conveying experiment bed has been established to study the flow characteristics of air- solids two-phase flow in horizontal pipeline. Euler model was applied to simulate it based on analysis of Gambit and fluid analysis software-fluent. The simulated results indicated: under the same gas phase conveying flow and pressure, the bigger particle diameter is, the bigger pressure drop is in the horizontal pipeline. The smaller particle diameter is, the more uniform of the particle’s distribution is, and the more easily obtaining the acceleration is. Particle concentration at the bottom of the horizontal pipe is increasing in the axial direction, while close to the tail pipe it will be reduce. The simulated conclusion is consistent with the actual measurement results, herewith rendering some footing for engineering design and theoretical research on pneumatic conveying systems.

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Two-Phase (Air and Water) Flow through Rock Joints: Analytical and Experimental Study

Journal of Geotechnical and Geoenvironmental Engineering ◽

10.1061/(asce)1090-0241(2003)129:10(918) ◽

2003 ◽

Vol 129 (10) ◽

pp. 918-928 ◽

Cited By ~ 10

Author(s):

B. Indraratna ◽

P. G. Ranjith ◽

J. R. Price ◽

W. Gale

Keyword(s):

Experimental Study ◽

Water Flow ◽

Rock Joints ◽

Two Phase ◽

Flow Through

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Experimental Study on Flow Characteristics of Ice-Water Slurries in a Horizontal Pipe.

Shigen-to-Sozai ◽

10.2473/shigentosozai.108.357 ◽

1992 ◽

Vol 108 (5) ◽

pp. 357-363

Author(s):

Hiroshi TAKAHASHI ◽

Tadashi MASUYAMA ◽

Toshio KAWASHIMA

Keyword(s):

Experimental Study ◽

Flow Characteristics ◽

Horizontal Pipe ◽

Ice Water

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Experimental Study of HFE 7000 Refrigerant Condensation in Horizontal Pipe Minichannels

Materials ◽

10.3390/ma14226886 ◽

2021 ◽

Vol 14 (22) ◽

pp. 6886

Author(s):

Małgorzata Sikora ◽

Tadeusz Bohdal ◽

Karolina Formela

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Heat Transfer Coefficient ◽

Pressure Drop ◽

Transfer Coefficient ◽

Flux Density ◽

Mass Flux ◽

Internal Diameter ◽

Two Phase ◽

Horizontal Pipe

This article presents the results obtained from our own experimental investigations on heat exchange and pressure drop during the condensation flow of the HFE 7000 refrigerant in pipe minichannels with an internal diameter of di = 1.2–2.5 mm. The influence of vapor quality x and the mass flux density G on the two-phase flow pressure drops and heat transfer is presented. The tests were performed for the mass flux density range of G = 110–4700 kg/m2s, saturation inlet temperature of Ts = 36–43 °C and heat flux density of q = 1 ÷ 20 kW/m2. The pressure drop characteristics and heat transfer coefficient as a function of the internal diameter of minichannels are illustrated. The results of experimental research on the heat transfer coefficient and two-phase pressure drop are compared with correlations developed by other authors. The best accuracy has a comparison of experimental study with correlation of Rahman-Kariya-Miyara et al. and Mikielewicz et al.

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