Laminar and turbulent flows of dilute polymer solutions: A physical model

1982 ◽  
Vol 21 (4-5) ◽  
pp. 572-577 ◽  
Author(s):  
F. Durst ◽  
R. Haas ◽  
W. Interthal
Keyword(s):  
Physical Model ◽  
Turbulent Flows ◽  
Polymer Solutions ◽  
Dilute Polymer Solutions ◽  
Laminar And Turbulent Flows

Study of Turbulent Flows of Dilute Polymer Solutions in a Couette Viscometer

1966 ◽  
Vol 10 (1) ◽  
pp. 335-351 ◽  
Author(s):  
E. W. Merrill ◽  
K. A. Smith ◽  
H. Shin ◽  
H. S. Mickley
Keyword(s):  
Turbulent Flows ◽  
Polymer Solutions ◽  
Couette Viscometer ◽  
Dilute Polymer Solutions

A numerical study on combined baffles quick-separation device

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ehsan Dehdarinejad ◽  
Morteza Bayareh ◽  
Mahmud Ashrafizaadeh
Keyword(s):  
Turbulent Flows ◽  
Separation Efficiency ◽  
Numerical Study ◽  
Turbulence Models ◽  
Complete Separation ◽  
Solid Particles ◽  
Flow Rates ◽  
Separation Device ◽  
Coupling Technique ◽  
Laminar And Turbulent Flows

Abstract The transfer of particles in laminar and turbulent flows has many applications in combustion systems, biological, environmental, nanotechnology. In the present study, a Combined Baffles Quick-Separation Device (CBQSD) is simulated numerically using the Eulerian-Lagrangian method and different turbulence models of RNG k-ε, k-ω, and RSM for 1–140 μm particles. A two-way coupling technique is employed to solve the particles’ flow. The effect of inlet flow velocity, the diameter of the splitter plane, and solid particles’ flow rate on the separation efficiency of the device is examined. The results demonstrate that the RSM turbulence model provides more appropriate results compared to RNG k-ε and k-ω models. Four thousand two hundred particles with the size distribution of 1–140 µm enter the device and 3820 particles are trapped and 380 particles leave the device. The efficiency for particles with a diameter greater than 28 µm is 100%. The complete separation of 22–28 μm particles occurs for flow rates of 10–23.5 g/s, respectively. The results reveal that the separation efficiency increases by increasing the inlet velocity, the device diameter, and the diameter of the particles.

On the mechanism of drag reduction in dilute polymer solutions

1996 ◽  
Vol 55 (4) ◽  
pp. 289-295 ◽  
Author(s):  
K. Hoyer ◽  
A. Gyr ◽  
A. Tsinober
Keyword(s):  
Drag Reduction ◽  
Polymer Solutions ◽  
Dilute Polymer Solutions
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