Publication

Optimization of a Kenics static mixer for non-creeping flow conditions

1999
Journal Articles

Abstract

Computational Fluid Dynamics (CFD) has been employed for the optimization of the mixing efficiency of a Kenics static mixer. A series of numerical simulations has been undertaken for non-creeping flow conditions to determine the optimal twist angle of the mixing elements. The mixer efficiency has been assessed by considering the computed pressure drop along the mixer and the size of the fluid structures remaining at the mixer outlet. Contrary to the results of previous investigations for creeping flows, it is shown that for the present non-creeping Bow conditions, the twist angle of 180 degrees employed in the standard Kenics design is optimal. It is demonstrated that CFD provides an invaluable tool for mixer design optimization, despite the significant computational resources necessary to undertake the present study. (C) 1999 Elsevier Science S.A. All rights reserved.

Official source

https://infoscience.epfl.ch/entities/publication/a11a159b-5172-439f-ba0a-0ed566346be5

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1999
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/a11a159b-5172-439f-ba0a-0ed566346be5

About this result

Related concepts (32)

Fluid dynamics

In physics, physical chemistry and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids—liquids and gases. It has several subdisciplines, including aerodynamics (the study of air and other gases in motion) and hydrodynamics (the study of liquids in motion). Fluid dynamics has a wide range of applications, including calculating forces and moments on aircraft, determining the mass flow rate of petroleum through pipelines, predicting weather patterns, understanding nebulae in interstellar space and modelling fission weapon detonation.

Stokes flow

Stokes flow (named after George Gabriel Stokes), also named creeping flow or creeping motion, is a type of fluid flow where advective inertial forces are small compared with viscous forces. The Reynolds number is low, i.e. . This is a typical situation in flows where the fluid velocities are very slow, the viscosities are very large, or the length-scales of the flow are very small. Creeping flow was first studied to understand lubrication. In nature, this type of flow occurs in the swimming of microorganisms and sperm.

Laminar flow

In fluid dynamics, laminar flow (ˈlæmənər) is characterized by fluid particles following smooth paths in layers, with each layer moving smoothly past the adjacent layers with little or no mixing. At low velocities, the fluid tends to flow without lateral mixing, and adjacent layers slide past one another like playing cards. There are no cross-currents perpendicular to the direction of flow, nor eddies or swirls of fluids. In laminar flow, the motion of the particles of the fluid is very orderly with particles close to a solid surface moving in straight lines parallel to that surface.

Related publications (16)

Optimization of a Kenics static mixer for non-creeping flow conditions

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