Two dimensional liquid flow focusing

2020 ◽  
Vol 32 (4) ◽  
pp. 042104 ◽  
Keyword(s):  
Liquid Flow ◽  
Two Dimensional ◽  
Flow Focusing

Continuous production of solid lipid nanoparticles by liquid flow-focusing and gas displacing method in microchannels

2009 ◽  
Vol 64 (19) ◽  
pp. 4115-4122 ◽  
Author(s):  
Junxian Yun ◽  
Songhong Zhang ◽  
Shaochuan Shen ◽  
Zhuo Chen ◽  
Kejian Yao ◽  
...  
Keyword(s):  
Liquid Flow ◽  
Solid Lipid Nanoparticles ◽  
Continuous Production ◽  
Lipid Nanoparticles ◽  
Flow Focusing ◽  
Solid Lipid

GROWTH HILLOCKS ON THE {100} FACES OF L-ARGININE PHOSPHATE MONOHYDRATE SINGLE CRYSTALS INVESTIGATED BY ATOMIC FORCE MICROSCOPY

2004 ◽  
Vol 11 (01) ◽  
pp. 71-75
Author(s):  
Y. L. GENG ◽  
D. XU ◽  
D. L. SUN ◽  
X. Q. WANG ◽  
G. H. ZHANG ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Stress Field ◽  
Single Crystals ◽  
Liquid Flow ◽  
Two Dimensional ◽  
Characteristic Structure ◽  
Force Microscopy ◽  
Atomic Force ◽  
Dislocation Sources ◽  
Extra Stress

Growth hillocks on the {100} faces of L-arginine phosphate monohydrate (LAP) single crystals grown at 25°C and at a supersaturation of 0.32 have been discussed. The typical dislocation growth hillocks are lopsided and elongate along the b direction. The dislocation sources are probably caused by the extra stress field which is introduced by the hollow cavities distributing on the steps and hillocks generated by the two-dimensional nucleus. The elongated shape is due to the characteristic structure of the LAP crystal. Apart from that, the formation of the lopsided growth hillocks is explained by the liquid flow theory.

scholarly journals Numerical Modeling of Two-Dimensional Gas-Liquid Flow Structures

2015 ◽  
Vol 9 (2) ◽  
Author(s):  
Vladimir Evgenyevich Vershinin ◽  
Rodion Mikhaylovich Ganopolsky ◽  
Vitaly Olegovich Polyakov
Keyword(s):  
Numerical Modeling ◽  
Liquid Flow ◽  
Flow Structures ◽  
Two Dimensional ◽  
Gas Liquid Flow

A Two-Dimensional Model of Predicting Sand Erosion in Elbows for Liquid Flow

2017 ◽  
Author(s):  
Rong Kang ◽  
Haixiao Liu ◽  
Mingyang Liu
Keyword(s):  
Penetration Depth ◽  
Liquid Flow ◽  
Symmetry Plane ◽  
Sand Particle ◽  
Mass Force ◽  
Two Dimensional ◽  
Dimensional Model ◽  
Particle Trajectories ◽  
Sand Erosion ◽  
Two Dimensional Model

A two-dimensional theoretical procedure is proposed in this study to estimate sand particle erosion in 90-degree elbows for liquid flow. The two-dimensional model adequately describes the erosion occurring along the centerline of the elbow extrados and to an extent reflects the erosion level on the whole elbow. The sand erosion prediction procedure is divided into three steps: building a two-dimensional liquid flow model, tracking the particle trajectories and predicting the penetration depth. First, a motion expression of the fluid streamline in an elbow is deduced from the continuity equation and the Euler equations, supposing the incompressible flow in the elbow is steady and inviscid. The radial velocity is introduced into the present model to reflect the effect of secondary flow on the symmetry plane. Second, particle trajectories are computed using the Lagrange approach based on the obtained expression of flow field distributions. The effects of the fluid drag force and the virtual mass force are considered as the main factors, and the particle impact velocity and angle are predicted through this method. Third, the penetration depth can be calculated from erosion correlations and the erosion profile along the centerline of the 90-degree elbow can also be worked out. Several typical experiments are selected to verify the two-dimensional theoretical model by comparing the predicted erosion results with the measured data.

Experimental Investigation of Geometrical Parameters for Gas-Liquid Droplet Generation in Flow-Focusing Configurations

2015 ◽  
Author(s):  
Pooyan Tirandazi ◽  
Carlos H. Hidrovo
Keyword(s):  
Flow Rate ◽  
Liquid Flow ◽  
Liquid Flow Rate ◽  
Liquid Droplet ◽  
Droplet Generation ◽  
Physical Parameters ◽  
Geometrical Parameters ◽  
Generation Process ◽  
Flow Focusing ◽  
Research Attention

Over the last few years considerable research attention has been directed towards droplet-based microfluidic devices because of their numerous applications in chemical and biological fields, to name a few. Specifically, gas-liquid droplet systems are of great importance for applications in which a gaseous phase is required instead of a second liquid phase. In this paper we experimentally investigate the manipulation of water droplets in flow-focusing configurations using a high inertial air stream. Compared to a T-junction geometry, the flow-focusing geometry provides the injection of highly inertial air on both sides of the droplet generation region, producing a more consistent droplet generation process in this type of gas-liquid microfluidic system. For this study, we changed the width of the liquid channel, the air flow rate, and the liquid flow rate in order to experimentally investigate their effects on the flow regime and generation frequency. The interactions of different geometrical and physical parameters produce three distinct flow regimes in the gas-liquid flow rate space (co-flow, jetting, and dripping). The controlled size and generation rate of droplets in this scheme provide the capability for precise and oil-free delivery of discrete microliter volumes of fluid.

Two-dimensional simulation of mass transport in polymer removal from a powder injection molding compact by thermal debinding

2001 ◽  
Vol 16 (8) ◽  
pp. 2436-2451 ◽  
Author(s):  
Ying Shengjie ◽  
Y. C. Lam ◽  
S. C. M. Yu ◽  
K. C. Tam
Keyword(s):  
Injection Molding ◽  
Mass Transport ◽  
Liquid Flow ◽  
Gas Flow ◽  
Powder Injection Molding ◽  
Forced Flow ◽  
Powder Injection ◽  
Two Dimensional ◽  
Thermal Debinding ◽  
Dimensional Simulation

Two-dimensional simulation of thermal debinding in powder injection molding based on mass and heat transfer in deformable porous media is proposed. The primary mechanisms of mass transport, i.e., liquid flow, gas flow, vapor diffusion, and convection, as well as the pyrolysis of polymers, and their interactions, are included in the model. The simulated results revealed that polymer removal process is primarily affected by liquid flow, which is mainly dominated by pressure-forced flow rather than capillary-driven flow. A significant phenomenon, enrichment with liquid polymer in the outer surface regions of the compact, is explained.

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