Transition to weak turbulence, chaos and hysteresis in natural convection

Peter Vadasz

Research output: Contribution to journalConference articlepeer-review


The fundamental understanding of the transition from laminar to turbulent convection is far from being conclusive. While major efforts are under way, there is still a significant challenge in front of the scientist and engineer to uncover the complex behavior linked to this transition. In isothermal shear flows the time dependent and three dimensional form of turbulence is well established experimentally and numerically. It is caused by the non-linear terms in the isothermal Navier-Stokes equations. Weak turbulence is linked to the problem of natural convection where an additional non-linear interaction appears as a result of the coupling between the equations governing the fluid flow and the energy equation. The latter can typically cause a transition to a non-steady and non-periodic regime (referred to as weak turbulent) at much lower values of the parameter controlling the flow, when compared to the corresponding isothermal system.

Original languageEnglish (US)
Pages (from-to)249-256
Number of pages8
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Issue number1
StatePublished - 2001
Event2001 ASME International Mechanical Engineering Congress and Exposition - New York, NY, United States
Duration: Nov 11 2001Nov 16 2001

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


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