test_moissonnage_selune
type: Agent

Effect of swirl on pure turbulent thermal plume development
type: Distribution
access URL: https://hal.science/hal-00086751
format: HTML
issued: 2026-05-09T13:37:06.195610
modified: 2026-05-09T13:37:06.182313

Effect of swirl on pure turbulent thermal plume development
type: Dataset
contact point: Organization
  fn: CCSD
keyword: plume
keyword: journal-articles
keyword: infoeu-reposemanticsarticle
keyword: turbulence
keyword: buoyancy
keyword: swirl
keyword: physmecatherphysics-physicsmechanics-physicsthermics-physicsclass-ph
landing page: 0142-727X
description: Pure thermal plumes have been exprimentally investigated under swirling conditions. Such conditions are applied upon the heated source impinging directly on the plume development. Results clearly underlined the existence of a threshold swirling number. Below the latter, I.E., at small swirling velocities, ascendant flow behaves like a classical static plume while at a high swirling number, the flow is clearly affected even if characteristic power laws are will valid. However, swirling of the source favors transition from laminar to turbulence as well as breakdown of coherent structures all around the plume motion. A direct measurement method was applied in order to assess instantaneous entrainment coefficients, and results clearly show appreciable influence of the swirling motion on the plume development. The driving mechanisms, i.e., contraction and expulsion phenomena, are strongly amplified and as a consequence directly interact on entrainment.
issued: 2026-05-09T13:37:06.190695
language: en
modified: 2026-05-09T13:37:06.190700