DOI: 10.1615/ICHMT.2006.TurbulHeatMassTransf
ISBN Print: 978-1-56700-229-4
ISSN: 2377-2816
DNS of Stable and Unstable Turbulent Thermal Boundary Layers
ABSTRACT
This paper presents direct numerical simulations (DNS) of stable and unstable turbulent thermal boundary layers. Since a buoyancy-affected boundary layer is often encountered in an urban environmental space where stable and unstable stratifications exist, exploring a buoyancy-affected boundary layer is very important to know the transport phenomena of the flow in an urban space. Thus, in order to investigate a buoyancy-affected boundary layer, we carried out time and space developing DNSs simulating stable and unstable turbulent thermal boundary layers. In the DNS results, the fundamental turbulent statistics of stable and unstable thermal boundary layers are shown, in which near-wall variations of turbulent quantities are difficult to measure experimentally, and then discussed.