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Qincheng Bi

Bio: Qincheng Bi is an academic researcher from Xi'an Jiaotong University. The author has contributed to research in topics: Heat transfer & Heat flux. The author has an hindex of 25, co-authored 114 publications receiving 1988 citations. Previous affiliations of Qincheng Bi include Hong Kong University of Science and Technology.


Papers
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Journal ArticleDOI
TL;DR: In this article, the characteristics of co-current upward air-water two-phase flow patterns in vertical equilateral triangular channels with hydraulic diameters of 2886, 1443 and 0866 mm were investigated experimentally.

247 citations

Journal ArticleDOI
TL;DR: In this paper, an experimental investigation of a liquid film falling around a horizontal tube was performed using a displacement micrometer to determine the distribution characteristics of the film thickness, and the experimental results also validated the Nusselt's theory giving a relatively reasonable prediction of the thickness around the upper perimeter of the tube but a poor prediction around the lower perimeter.

100 citations

Journal ArticleDOI
TL;DR: In this article, a correlation is developed for predicting the pressure drops of single-phase laminar and turbulent flow through the miniature triangular channels based on that proposed by Churchill (S.W. Churchill, Friction-factor equation spans all fluid flow regimes, Chem. Eng. Prog. 84(24) (1977) 91−92) for circular tubes.

96 citations

Journal ArticleDOI
TL;DR: Wang et al. as discussed by the authors measured the void fraction of gas-liquid two-phase flow in vertical upward pipes at Xi'an Jiaotong University (XJTU).

84 citations

Journal ArticleDOI
TL;DR: In this article, a large amount of experimental data were obtained from the experiments supplementing the extensive database previously compiled for fossil fuel-fired power plants, and prediction methods for heat-transfer coefficient were developed from various databases.

80 citations


Cited by
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Journal ArticleDOI
TL;DR: While the book is a standard fixture in most chemical and physical laboratories, including those in medical centers, it is not as frequently seen in the laboratories of physician's offices (those either in solo or group practice), and I believe that the Handbook can be useful in those laboratories.
Abstract: There is a special reason for reviewing this book at this time: it is the 50th edition of a compendium that is known and used frequently in most chemical and physical laboratories in many parts of the world. Surely, a publication that has been published for 56 years, withstanding the vagaries of science in this century, must have had something to offer. There is another reason: while the book is a standard fixture in most chemical and physical laboratories, including those in medical centers, it is not as frequently seen in the laboratories of physician's offices (those either in solo or group practice). I believe that the Handbook can be useful in those laboratories. One of the reasons, among others, is that the various basic items of information it offers may be helpful in new tests, either physical or chemical, which are continuously being published. The basic information may relate

2,493 citations

Journal ArticleDOI
TL;DR: Transport characteristics of pressure-driven, multiphase flows through microchannel networks tens of nanometres to several hundred of micrometres wide are reviewed with emphasis on conditions resulting in enhanced mixing and reduced axial dispersion.
Abstract: We review transport characteristics of pressure-driven, multiphase flows through microchannel networks tens of nanometres to several hundred of micrometres wide with emphasis on conditions resulting in enhanced mixing and reduced axial dispersion. Dimensionless scaling parameters useful in characterizing multiphase flows are summarized along with experimental flow visualization techniques. Static and dynamic stability considerations are also included along with methods for stabilizing multiphase flows through surface modifications. Observed gas–liquid and immiscible liquid–liquid flows are summarized in terms of flow regime diagrams and the different flows are related to applications in chemistry and materials synthesis. Means to completely separate multiphase flows on the microscale and guidelines for design of scalable multiphase systems are also discussed.

933 citations

Journal ArticleDOI
TL;DR: In this paper, a flow pattern map was developed based on the probability of appearance of each type of flow, and compared to the existing flow pattern maps obtained for ∼1-mm diameter channels.

571 citations

Journal ArticleDOI
TL;DR: In this paper, micro particle image velocimetry (μPIV) and fluorescence microscopy techniques were used to characterize microscale segmented gas-liquid flow at low superficial velocities relevant for chemical reactions with residence times of up to several minutes.
Abstract: We use micro particle image velocimetry (μPIV) and fluorescence microscopy techniques to characterize microscale segmented gas–liquid flow at low superficial velocities relevant for chemical reactions with residence times of up to several minutes. Different gas–liquid microfluidic channel networks of rectangular cross section are fabricated in poly(dimethylsiloxane) (PDMS) using soft lithography techniques. The recirculation motion in the liquid segments associated with gas–liquid flows as well as the symmetry characteristics of the recirculations are quantified for straight and meandering channel networks. Even minor surface roughness effects and the compressibility of the gas phase induce loss of symmetry and enhance mixing across the centerline in straight channels. Mixing is further accelerated in meandering channels by the periodic switching of recirculation patterns across the channel center. We demonstrate a new, piezoelectrically activated flow injection technique for determining residence time distributions (RTDs) of fluid elements in multiphase microfluidic systems. The results confirm a narrowed liquid phase RTD in segmented flows in comparison to their single-phase counterparts. The enhanced mixing and narrow RTD characteristics of segmented gas–liquid flows are applied to liquid mixing and in sol–gel synthesis of colloidal nanoparticles.

510 citations

Journal ArticleDOI
TL;DR: In this paper, hydrodynamics and mass transfer characteristics in cocurrent gas-liquid flow through a horizontal rectangular microchannel with a hydraulic diameter of 667 μ m have been investigated experimentally.

418 citations