Rotating and Stratified Fluids (IAPSO, IAGA, IAMAS, SEDI)
Thursday, July 10 AM
Location: Site B, Room 21
TIME [ 1030 ] [ JSP10/10A/B21-005 ]
TWO-DIMENSIONAL TURBULENCE ON A BOUNDED DOMAIN
GertJan F. VAN HEIJST(Department of Physics, Eindhoven University of Technology)
Herman J.H. CLERCX(Department of Physics, Eindhoven University of Technology)
In contrast to its counterpart in the 3D world, turbulence in 2D is characterized by an inverse energy cascade. The presence of this inverse cascade in 2D turbulence is visible in the so-called self-organization of such flows: larger vortices and structures are observed to emerge from initially random flow fields.The lecture will address the evolution of 2D turbulent flows on a finite domain with no-slip walls. Results of both laboratory experiments and numerical simulations reveal the crucial role played by the unsteady boundary layers: the domain boundaries act as important sources of large-amplitude vorticity filaments. In addition, spectral characteristics and some aspects of (chaotic) tracer transport will be highlighted.