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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Print: 1065-3090
ISSN Online: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v13.i3.50
pages 287-297

OBSERVATION AND SIMULATION OF THE DOUBLE LAYER STRUCTURE OF THE THERMAL BOUNDARY LAYER IN A SIDE-HEATED CAVITY

Feng Xu
School of Engineering, James Cook University, Townsville, QLD 4811, Australia
John C. Patterson
Centre for Wind, Waves and Water, School of Civil Engineering, The University of Sydney Darlington, NSW 2006, Australia
Chengwang Lei
The University of Sydney

ABSTRACT

The double layer structure of the thermal boundary layer in a side-heated cavity is investigated numerically and experimentally. Through comparing the flow visualizations with the numerical results, the mechanisms of the transition of the thermal boundary layer are discussed. The numerical results demonstrate that an upward thermal tongue leads to the double layer structure of the thermal boundary layer in the quasi-steady stage, which is observed in shadowgraph images.