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Turbulence Control (Microflap, Microballoon, Microsynthetic Jet)

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Encyclopedia of Microfluidics and Nanofluidics

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Synonyms

Flow control; Mixing enhancement; Turbulent shear stress

Definition

A flow field is broadly classified as laminar or turbulent. Pressure, velocity, and temperature information are used to characterize a flow field. In turbulent flows, these flow variables are random functions of space and time. The coherent and random flow structures/vortices and interactions between them influence the overall behavior of the turbulent flow field. The location of the wall surface, Reynolds number, Mach number, buoyancy force due to temperature, and concentration gradients, etc. influence the turbulent flow field characteristics. The nature of flow field also depends on the convective or absolute instability mechanism leading to turbulent flow.

The flow control is a mechanism by which the flow field is manipulated to obtain required behavior in comparison to the natural uncontrolled case. The flow control is broadly classified as (a) passive control, where no auxiliary power source is required,...

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References

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, IIT Kanpur, Kanpur, India

    Pradipta Kumar Panigrahi

Authors
  1. Pradipta Kumar Panigrahi
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Correspondence to Pradipta Kumar Panigrahi .

Editor information

Editors and Affiliations

  1. VU Station B 351592, Vanderbilt University Dept. Mechanical Engineering, Nashville, Tennessee, USA

    Dongqing Li

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Panigrahi, P.K. (2013). Turbulence Control (Microflap, Microballoon, Microsynthetic Jet). In: Li, D. (eds) Encyclopedia of Microfluidics and Nanofluidics. Springer, Boston, MA. https://doi.org/10.1007/978-3-642-27758-0_1633-3

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  • DOI: https://doi.org/10.1007/978-3-642-27758-0_1633-3

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  • Publisher Name: Springer, Boston, MA

  • Online ISBN: 978-3-642-27758-0

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