Theory of instantaneous sinuous structure in turbulent buoyant plumes

This paper reports a theory which explains the flickering motion of turbulent plumes as well as their large-scale sinuous structure. The theory is based on the fact that the inviscid region of the plume (the "plume column") possesses elastic properties analogous to those of elastic rods subjected to longitudinal compression. It is shown that the straight plume column is not stable and buckles. The distance between two consecutive elbows is proportional to the local plume diameter, in other words, the shapes of all buckled plumes are geometrically similar. A buckled plume collapses periodically due to the interaction of its lateral elbows with the stagnant ambient. This interaction is responsible for the intermittent formation of large-scale buoyant eddies on the periphery of the turbulent plume. © 1982 Springer-Verlag.

Full Text

Duke Authors

Cited Authors

  • Bejan, A

Published Date

  • 1982

Published In

Volume / Issue

  • 16 / 4

Start / End Page

  • 237 - 242

International Standard Serial Number (ISSN)

  • 0042-9929

Digital Object Identifier (DOI)

  • 10.1007/BF01375648

Citation Source

  • SciVal