Investigation of the wall shear stress in vertical bubbly flow under different bubble size conditions

Liu, Tay-Jian

doi:10.1016/s0301-9322(97)00030-x

Cited by 38 publications

(16 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, during these experiments the bubble size increased with gas input because a porous injector was used to generate the bubbles (Koide et al 1968). To study the effect of bubble-size and gas input separately, Liu (1993Liu ( , 1997) used a special gas injector at large liquid-input conditions. (a) Void fraction profiles measured by Serizawa et al (1975) in a 60-mm diameter air-water pipe at increased gas input.…”

Section: Void Fraction Radial Profilementioning

confidence: 99%

See 1 more Smart Citation

Fluid Mechanical Aspects of the Gas-Lift Technique

Guet

Ooms

2006

Annu. Rev. Fluid Mech.

View full text Add to dashboard Cite

The gas-lift technique comprises the injection of gas bubbles in vertical oil wells to increase production. It is based on a reduction of the tubing gravitational pressure gradient. Several fluid-flow phenomena influencing such vertical gas-liquid flows are discussed. These effects include the radial distribution of void fraction and of gas and liquid velocity, flow regime changes, and system stability problems. Associated consequences for gas-lift performance and related optimization approaches are also discussed.

show abstract

Section: Void Fraction Radial Profilementioning

confidence: 99%

“…(a) Void fraction profiles measured by Serizawa et al (1975) in a 60-mm diameter air-water pipe at increased gas input. (b) Void fraction radial profiles in a 57-mm diameter tube and associated bubble-size values (Liu 1997). …”

Section: Void Fraction Radial Profilementioning

confidence: 99%

Fluid Mechanical Aspects of the Gas-Lift Technique

Guet

Ooms

2006

Annu. Rev. Fluid Mech.

View full text Add to dashboard Cite

show abstract

“…Recently, more and more attention has been paid to the two-phase flow induced internal corrosion of pipelines, in which the gas-liquid mixture of CO 2 , H 2 S, oil and water is transported [8][9][10][11]. In the process of corrosion, what is happening near the tube wall has a great influence on the corrosion [12].…”

Section: Introductionmentioning

confidence: 99%

“…Liu [8] studied the wall shear stress in vertical bubbly flow by the hot film probes. Cognet et al [13], Hanratty [14], Mao and Dukler [15] studied the wall shear stress in vertical slug flow by limiting diffusion current probes.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on near wall transport characteristics of slug flow in a vertical pipe

2012

View full text Add to dashboard Cite

In this work, the wall shear stress and the mass transfer coefficient of the gas-liquid two-phase upward slug flow in a vertical pipe are investigated experimentally, using limiting diffusion current probes and digital highspeed video system. In experiments, the instantaneous and averaged characteristics of wall shear stress and mass transfer coefficient are concerned. The experimental results are compared with the numerical results in previous paper of the authors. Both experiment and numerical simulation show that the superficial gas and liquid velocities have an obvious influence on the instantaneous characteristics of the two profiles. The mass transfer coefficient has characteristics similar to the wall shear stress. The instantaneous wall shear stress and mass transfer coefficient profiles have the periodicity of slug flow. The averaged wall shear stress and mass transfer coefficient increase with increased superficial gas velocity. However, there is inconsistency in the variation trends of the averaged wall shear stress and mass transfer coefficient with superficial liquid velocity between experimental result and numerical simulation result, which can be attributed to the difference in flow condition. Moreover, the Taylor bubble length is also another impacting factor. The experimental and numerical results all shows that the product scale can not be damaged directly by the flow movement of slug flow. In fact, the alternative forces and fluctuations with high frequency acting on the pipe wall due to slug flow is the main cause for the slug flow enhanced CO 2 corrosion process.

show abstract

“…So far, a great number of numerical and experimental investigations show that the void fraction profile displays various distributing patterns depending on the flow conditions and environments, and through reviewing the existing references, it is discovered that the void fraction profile is tightly associated with numerous factors such as bubble size, global void fraction, bubble shape, flow direction with respect to gravity, bubble injection place, liquid velocity, gas velocity, pipe diameter, air injection method, gravity, purity of liquid, etc. [3][4][5][6][7][8][9][10][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Based on the results of the references (such as Serizawa et al [24], Nakoryakov et al [20], Liu [15], Okawa et al [21], etc.)…”

Section: Introductionmentioning

confidence: 99%

Mechanism on lateral distribution of small bubbles in vertical bubbly upflows

Pang

Wei

2010

Nonlinear Dyn

View full text Add to dashboard Cite

The void fraction profile and distributing mechanism of small bubbles were investigated in detail by using the Euler-Lagrange two-way model. The continuous phase is simulated by using direct numerical simulations in Euler frame of reference. Bubble trajectories are tracked by solving the Newton equations of motion with considering forces including gravity force (buoyant force), drag force, lift force, wall lift force, pressure gradient force, virtual mass force, and inertia force in Lagrange frame of reference. Results show that the void fraction profile of small bubbles exhibits double peak values, which is caused by different interphase forces dominating over bubble movements at different bubble places, and paths of bubbles are directly related to their injection places.

show abstract

Investigation of the wall shear stress in vertical bubbly flow under different bubble size conditions

Cited by 38 publications

References 15 publications

Fluid Mechanical Aspects of the Gas-Lift Technique

Fluid Mechanical Aspects of the Gas-Lift Technique

Experimental study on near wall transport characteristics of slug flow in a vertical pipe

Mechanism on lateral distribution of small bubbles in vertical bubbly upflows

Contact Info

Product

Resources

About