Search
Talk

Pattern formation, boundary layer dynamics and turbulent heat transfer in Rayleigh-Bénard convection flows

  • Jörg Schumacher (TU Ilmenau)
A3 01 (Sophus-Lie room)

Abstract

Rayleigh-Bénard convection (RBC) in a fluid layer between two parallel walls, uniformly heated from below and cooled from above, is one of the fundamental flows with numerous applications in nature and technology. The three-dimensional Boussinesq equations which couple the velocity and temperature fields are studied by direct numerical simulations applying a spectral element method. We investigate two configurations of convection: (i) RBC in closed cylindrical cells at high Rayleigh numbers, the typical laboratory experiment configuration; (ii) RBC in horizontally extended domains at moderate Rayleigh numbers. We will discuss the global transport of heat and momentum and its close connection to the dynamics in the boundary layers of temperature and velocity fields at the walls for the first case. We will also present recent analysis results on the structure formation at large-scales for the second case. This includes the detection of defects in the time-averaged temperature and velocity patterns as well as Lagrangian trajectory-based methods that reveal how the heat is carried across the fluid layer.

Katja Heid

MPI for Mathematics in the Sciences Contact via Mail

Upcoming Events of This Seminar

  • Mar 12, 2024 tba with Theresa Simon
  • Mar 26, 2024 tba with Phan Thành Nam
  • Mar 26, 2024 tba with Dominik Schmid
  • May 7, 2024 tba with Manuel Gnann
  • May 14, 2024 tba with Barbara Verfürth
  • May 14, 2024 tba with Lisa Hartung
  • Jun 25, 2024 tba with Paul Dario
  • Jul 16, 2024 tba with Michael Loss