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Investigation of bubble diameter and flow regime between water and dilute aqueous ethanol solutions in

Baharak SAJJADI, Mostafa Keshavarz MORAVEJI, Reza DAVARNEJAD

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 194-202 doi: 10.1007/s11705-010-1019-2

Abstract: In this study, the effect of ethanol addition into pure water and its concentration on bubble diameterBubble size distribution was measured by photography and picture analysis at various concentrations ofAlcohol concentration enhancement caused bubble diameter to decrease.Furthermore, the bubbles diameter in pure water was nearly 4 times higher than that of ethanol with concentration

Keywords： airlift rector     bubble diameter     gas hold-up     flow regime     ethanol    

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Simulation of bubble column reactors using CFD coupled with a population balance model

Tiefeng WANG

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 162-172 doi: 10.1007/s11705-009-0267-5

Abstract: Bubble columns are widely used in chemical and biochemical processes due to their excellent mass andDue to the importance of the bubble behavior, the bubble size distribution must be considered in theThe population balance model (PBM) is an effective approach to predict the bubble size distribution,Bubble breakup and coalescence models due to different mechanisms are discussed.in high gas holdup, and interphase forces of bubble swarms.

Keywords： bubble column     computational fluid dynamics     bubble breakup and coalescence     population balance model     bubble    

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Experimental study on bubble behavior and CFD simulation of large-scale slurry bubble column reactor

Haoyi SUN, Tao LI, Weiyong YING, Dingye FANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 515-522 doi: 10.1007/s11705-010-0516-7

Abstract: Slurry bubble column reactors (SBCR) is a three-phase fluidized reactor with outstanding advantages comparedIn this paper, an experiment was conducted to investigate the bubble behavior in SBCR with a height of5600 mm and an interior diameter of 480 mm.Bubble rise velocity, bubble diameter, and gas holdup in different radial and axial positions are measuredTap water, air, and glass beads (mean diameter 75–150 μm) are used as liquid, gas, and solid phases,

Keywords： SBCR     four-channel conductivity probe     hydrodynamics     CFD    

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Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Frontiers of Structural and Civil Engineering   Pages 1387-1399 doi: 10.1007/s11709-023-0005-y

Abstract: The slump, volume stability, and permeability test of bubble–slurry-conditioned sand was conducted toexamine the conditioning effect, and the stratum applicability of bubble–slurry was determined fromIt was found that the conditioning effect of bubble–slurry in coarse gravel soil was excellent and couldThe main stabilization mechanism of bubble–slurry is that bentonite particles provide a space barrierAnd three seepage modes of bubble–slurry-conditioned sand were innovatively defined, and the occurrence

Keywords： EPB shield     bubble–slurry     soil conditioning     stability     permeability    

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The role of single deformed bubble on porous foam tray with submerged orifices on the mass transfer enhancement

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2127-2143 doi: 10.1007/s11705-023-2363-3

Abstract: liquid encroaching on the gas channels causes the increasing orifices velocity, which makes the trailing bubbleeasily detach from the midst of the leading bubble and causes pairing coalescence.

Keywords： bubble formation     porous submerged orifices     process intensification     foam tray    

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Synchronous observation of rising soluble bubble through quiescent solution

Yifu ZHANG , Shuai TIAN , Weizhong LI , Yongchen SONG ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 307-312 doi: 10.1007/s11708-009-0028-7

Abstract: A model was set up to describe the behavior of the bubble in a visual experimental system in which ahigh-speed camera rose instantaneously with the movement of the bubble.A series of trajectory videos about the bubble were recorded by a computer linked to the camera.The trajectory, volume changes and rate of mass transfer of the bubble were obtained by the CIPT.With the volume decreasing, the disturbed behavior of the bubble becomes tempered.

Keywords： soluble bubble     mass transfer     synchronous observation     computer image processing    

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Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor

Zhen CHEN, Haitao ZHANG, Weiyong YING, Dingye FANG

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 4,   Pages 461-471 doi: 10.1007/s11705-010-0517-6

Abstract: 25 experimental data, and a steady-state one-dimensional mathematical model was further developed in bubblecolumn slurry reactor (BCSR), which was assumed that the bubble phase was plug flow, and the liquidsynthesis process were obtained: reaction temperature at 240°C, reactor pressure at 5 MPa and reactor diameter

Keywords： syngas     alcohol/ether fuel     slurry catalyst     bubble column slurry reactor     global kinetics     mathematical model    

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Feasibility of bubble surface modification for natural organic matter removal from river water using

Yulong Shi, Jiaxuan Yang, Jun Ma, Congwei Luo

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 6, doi: 10.1007/s11783-017-0954-2

Abstract: A novel, functionalized bubble surface can be obtained in dissolved air flotation (DAF) by dosing chemicalsIn this study, different cationic chemicals were used as bubble surface modifiers, and their effectsThe results showed that chitosan was the most promising bubble modifier compared with a surfactant andPositive bubble modification provides an alternative approach for DAF to enhance NOM removal.

Keywords： Bubble surface modification     Chitosan     Disinfection by-product     Dissolved air flotation     Organic fraction    

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Impacts of different diameter combinations on the temperature of a crude oil pipeline when colocating

Bo YU, Yue SHI, Xin LIU, Jinjun ZHANG, Jinjia WEI,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 192-197 doi: 10.1007/s11708-009-0074-1

Abstract: In order to show the effects of different diameter combinations on crude oil temperature when a crudeoil pipeline and a products pipeline are laid in one trench, four typical diameter combinations areIn real pipeline constructions, the effects of other diameter combinations on crude oil temperature canbe predicted by the method of linear interpolation to calculate results of the four diameter combinations

Keywords： technology of laying two pipelines in one trench     diameter combinations     crude oil temperature     pipeline    

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Effects of slip length and hydraulic diameter on hydraulic entrance length of microchannels with superhydrophobic

Wenchi GONG, Jun SHEN, Wei DAI, Zeng DENG, Xueqiang DONG, Maoqiong GONG

Frontiers in Energy 2020, Volume 14, Issue 1,   Pages 127-138 doi: 10.1007/s11708-020-0661-8

Abstract: This paper investigated effects of slip length and hydraulic diameter on the hydraulic entrance lengthincreases with the increasing slip length at approximately Re<10, and does not vary with the hydraulic diameter

Keywords： laminar flow     hydraulic entrance length     super hydrophobic surface     slip length     hydraulic diameter    

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Numerical simulation of micro scale flowing and boiling

Wen WANG, Rui ZHUAN,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 396-401 doi: 10.1007/s11708-009-0049-2

Abstract: Numerical simulations of flowing and boiling in micro channels are presented, including the modeling of bubble

Keywords： volume-of-fluid (VOF)     micro channel     nucleate boiling     bubble dynamics     simulation    

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Assembling and defect treatment of large-diameter shield segment

Cheng Xuewu,Xu Weiqing,Yang Zhiyong

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 89-93

Abstract:

In the paper, the segment assembling techniques of large-diameter shieldwere summarized, and the apparent damage reasons and repair technology of large-diameter shield reinforcedconcrete segment in the construction were preliminarily analyzed, based on research of the underground diameterabove hance and below hance, respectively, assuring the good strength and surface quality of large-diameter

Keywords： large-diameter shield     segment     assembling     repair    

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Stability analysis of large diameter thin-walled tube beam-columns

PAN Hanming, GUO Yanlin, LIANG Shuo, PEI Shengxing, LIANG Weisheng, WANG Lewen

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 123-132 doi: 10.1007/s11709-008-0017-7

Abstract: Based on a blind spot in the current design standard of steel structures, the large diameter thin-walledThe influence of several factors on stability capacity of the large diameter thin-walled tube beam-columnscalculation formulas of the stability bearing capacity are presented for beam-column members of the large diameter

Keywords： ultimate strength     nonlinear     numerical analytical     diameter thin-walled     practice    

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Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 2,   Pages 165-171 doi: 10.15302/J-FASE-2017145

Abstract: The influences of different parameters such as droplet diameter, application intensity, specific powerApplication intensity was also correlated with injury when the droplet diameter was larger than 1 mm.

Keywords： application intensity     damage     floriculture     flowers     specific power     sprinkler irrigation    

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Development of electrorheological chip and conducting polymer-based sensor

Xianzhou ZHANG, Weihua LI, Weijia WEN, Yanzhe WU, Gordon WALLACE,

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 4,   Pages 393-396 doi: 10.1007/s11465-009-0043-8

Abstract: This paper presents the development of an integrated sensor using two types of smart materials: electrorheological (ER) fluids and conducting polymers (CPs). The developed ER chip worked as an actuator, and it was driven by different voltages and control frequencies. When the four electrodes are controlled synchronously, the diaphragm acts as a vibrator whose frequency can be adjusted in accordance with the frequency of the electrical signals. The response signals of the CP sensor were recorded, and its properties were analyzed. Experimental results show that the amplitude decreases monotonically when the frequency increases, owing to the time delay in the pressure buildup in the ER chip. However, the displacement fluctuation of the diaphragm below 20Hz can be detected clearly even if the value is very low. When the vibration frequency is larger than 20Hz, the CP sensor can hardly detect the displacement fluctuation. Thus, the upper limit frequency that the CP sensor can detect is about 20Hz. The practical applications of this microdevice are also discussed.

Keywords： electrorheological (ER) fluids     conducting polymer (CP)     polydimethylsioxane (PDMS)     driving frequency     amplitude     bubble    

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Title Author Date Type Operation

Investigation of bubble diameter and flow regime between water and dilute aqueous ethanol solutions in

Baharak SAJJADI, Mostafa Keshavarz MORAVEJI, Reza DAVARNEJAD

Journal Article

Simulation of bubble column reactors using CFD coupled with a population balance model

Tiefeng WANG

Journal Article

Experimental study on bubble behavior and CFD simulation of large-scale slurry bubble column reactor

Haoyi SUN, Tao LI, Weiyong YING, Dingye FANG

Journal Article

Experimental study on the stratum applicability and mechanisms of bubble–slurry for earth pressure balance

Journal Article

The role of single deformed bubble on porous foam tray with submerged orifices on the mass transfer enhancement

Journal Article

Synchronous observation of rising soluble bubble through quiescent solution

Yifu ZHANG , Shuai TIAN , Weizhong LI , Yongchen SONG ,

Journal Article

Study on direct alcohol/ether fuel synthesis process in bubble column slurry reactor

Zhen CHEN, Haitao ZHANG, Weiyong YING, Dingye FANG

Journal Article

Feasibility of bubble surface modification for natural organic matter removal from river water using

Yulong Shi, Jiaxuan Yang, Jun Ma, Congwei Luo

Journal Article

Impacts of different diameter combinations on the temperature of a crude oil pipeline when colocating

Bo YU, Yue SHI, Xin LIU, Jinjun ZHANG, Jinjia WEI,

Journal Article

Effects of slip length and hydraulic diameter on hydraulic entrance length of microchannels with superhydrophobic

Wenchi GONG, Jun SHEN, Wei DAI, Zeng DENG, Xueqiang DONG, Maoqiong GONG

Journal Article

Numerical simulation of micro scale flowing and boiling

Wen WANG, Rui ZHUAN,

Journal Article

Assembling and defect treatment of large-diameter shield segment

Cheng Xuewu,Xu Weiqing,Yang Zhiyong

Journal Article

Stability analysis of large diameter thin-walled tube beam-columns

PAN Hanming, GUO Yanlin, LIANG Shuo, PEI Shengxing, LIANG Weisheng, WANG Lewen

Journal Article

Influence of sprinkler irrigation droplet diameter, application intensity and specific power on flower

Yisheng ZHANG, Delan ZHU

Journal Article

Development of electrorheological chip and conducting polymer-based sensor

Xianzhou ZHANG, Weihua LI, Weijia WEN, Yanzhe WU, Gordon WALLACE,

Journal Article