Effect of Microbubble Mixtures on the Washing Rate of Surfactant Solutions in a Swirling Flow and an Alternating Flow

2013 ◽  
Vol 50 (5) ◽  
pp. 332-338 ◽  
Author(s):  
Akiomi Ushida ◽  
Tomiichi Hasegawa ◽  
Keiko Amaki ◽  
Takatsune Narumi
Keyword(s):  
Swirling Flow ◽  
Surfactant Solutions

Swirling Flow of a Viscoelastic Fluid With Free Surface: Part I — Experimental Analysis of Vortex Motion by PIV

2004 ◽  
Author(s):  
Jinjia Wei ◽  
Fengchen Li ◽  
Bo Yu ◽  
Yasuo Kawaguchi
Keyword(s):  
Reynolds Number ◽  
Free Surface ◽  
Vortex Breakdown ◽  
Swirling Flow ◽  
Particle Image Velocimetry System ◽  
Meridional Plane ◽  
Cylindrical Wall ◽  
Rotating Disc ◽  
Solution Flow ◽  
Surfactant Solutions

The swirling flows of water and CTAC (cetyltrimethyl ammonium chloride) surfactant solutions in an open cylindrical container with a rotating disc at the bottom were experimentally investigated by use of a double-pulsed PIV (particle image velocimetry) system. The mass concentrations of CTAC solutions were in the range of 50–1000 ppm, and the Reynolds number based on angular velocity, kinematic viscosity of water and radius of rotating disc was fixed at 4.3 × 104. The aspect ratio of the height of the liquid filled into the cylindrical vessel to the radius of the vessel was set to 1.0. The secondary flow patterns in the meridional plane and the tangential velocities were obtained. The flow pattern in the meridional plane for water at the present high Reynolds number differed greatly from that at low Reynolds numbers, and an inertia-driven vortex was pushed to the corner between the free surface and the cylindrical wall by a counter-rotating vortex caused by vortex breakdown. For the 1000-ppm surfactant solution flow, the inertia-driven vortex located at the corner between the bottom and the cylindrical wall whereas an elasticity-driven reverse vortex governed the majority of the flow field. The radial distributions of the time-averaged tangential velocities also differed for water and surfactant solutions. The rotation of the fluid caused a deformation of the free surface with a dip at the center. The dip was largest for the water case and decreased with increasing surfactant concentration.

NUMERICAL SIMULATION OF PULSATING HEAT PIPE WITH SURFACTANT SOLUTIONS

2018 ◽  
Author(s):  
Durga Bastakoti ◽  
Hongna Zhang ◽  
Wei-Hua Cai ◽  
Feng-Chen Li
Keyword(s):  
Numerical Simulation ◽  
Heat Pipe ◽  
Pulsating Heat Pipe ◽  
Surfactant Solutions

PRESSURE LOSSES AND HEAT TRANSFER FOR FLOW OF DRAG REDUCING SURFACTANT SOLUTIONS IN PIPES AND FITTINGS

Equipment ◽  
2006 ◽  
Author(s):  
J. Sestak ◽  
V. Mik ◽  
J. Myska ◽  
M. Dostal ◽  
L. Mihalka
Keyword(s):  
Heat Transfer ◽  
Pressure Losses ◽  
Surfactant Solutions

Isothermal swirling flow in a dump combustor

1987 ◽  
Author(s):  
M. SAMIMY ◽  
A. NEJAD ◽  
R. CRAIG ◽  
S. VANKA
Keyword(s):  
Swirling Flow ◽  
Dump Combustor

The increase in gas-dynamic efficiency of filters with short diffuser when operating in swirling flow

2018 ◽  
Vol 2 (1) ◽  
pp. 72-79
Author(s):  
N. Yu. Fil’kin ◽  
◽  
V. L. Yusha ◽  
A. A. Kapelyukhovskaya ◽  
◽  
...  
Keyword(s):  
Swirling Flow ◽  
Dynamic Efficiency ◽  
Gas Dynamic

THREE-DIMENSIONAL LAMINAR SWIRLING FLOW IN A PIPE

2019 ◽  
Author(s):  
Rodrigo Vidal Cabral ◽  
Andre Damiani Rocha
Keyword(s):  
Swirling Flow ◽  
Three Dimensional

INFLUENCE OF FLOW SWIRLING ON COMBUSTION OF ALUMINUM POWDER AEROSUSPENSION IN A CHAMBER WITH EXTENSION

2020 ◽  
Author(s):  
A. Yu. Krainov ◽  
◽  
K. M. Moiseeva ◽  
V. A. Poryazov ◽  
◽  
...  
Keyword(s):  
Dynamic Model ◽  
Aluminum Powder ◽  
Swirling Flow ◽  
Numerical Study ◽  
Mathematical Formulation ◽  
Expansion Chamber ◽  
Flow Swirling ◽  
Air Suspension

A numerical study of combustion of the aluminum-air suspension in the swirling flow in the expansion chamber has been performed. The physical and mathematical formulation of the problem is based on the dynamic model of the multiphase reacting media.

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