Statistical coherence of large scale circulation in turbulent rayleigh b 233 nard convection

Abstract

Rayleigh B 195 169 nard convection RBC is one of the classical problems in fluid dynamics in which a fluid layer is heated from below and cooled from the top In this thesis various aspects of turbulent RBC inside a Cartesian box and cylindrical cell are studied using direct numerical simulations DNS Our prime focus is to identify and characterize large scale circulation LSC which is an organization of thermal plumes to form a large scale coherent structure For rotating RBC inside a cylindr...