Counter Rotating Vortices

Gibson, Allison

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https://hdl.handle.net/2142/89972 Copy

Description

Title

Counter Rotating Vortices

Author(s)

Gibson, Allison

Contributor(s)

Chamorro, Leonardo P.

Issue Date

2016-04

Keyword(s)

• Fluids
• Vortices
• Heat Transfer
• Mechanical Science
• MechSe

Abstract

A common method to enhance convective heat transfer is to utilize vortex-generating compact slender structures. When a vortex generator is placed in the streamwise direction of a flowing fluid, a pressure drop develops between the mean flow of the fluid and the wake region immediately downstream from the vortex generator. This pressure drop gives rise to a counter-rotating vortex pair (CVP). This CVP is a primary structure within the wake that governs and enhances mixing, while improving the heat transfer coefficient. The figure on the left shows the formation of a CVP as the fluid flows over a rectangular vortex generator located at x = -50 mm. The vectors show the fluid forming two distinct circulation zones that mirror one and other. The figure on the right shows that the CVP (shown with vorticity iso-sufaces) is prevalent in the near-wake for a significant distance downstream from the vortex generator until it eventually takes a more complex form downstream. By better understanding turbulent flows and vortex behavior, the overall efficiency of heat transfer can be greatly improved. For more information about the Image of Research--Undergraduate Edition go to: http://go.library.illinois.edu/imageofresearch_uredition

Type of Resource

• text
• image

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http://hdl.handle.net/2142/89972

Copyright and License Information

Copyright 2016 Allison Gibson

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