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Journal of Flow Visualization and Image Processing
SJR: 0.11 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.2013008371
pages 291-308

FLOW VISUALIZATION OF NATURAL CONVECTION IN A VERTICAL CHANNEL WITH ANTISYMMETRIC HEATING

Derek Roeleveld
Department of Mechanical & Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario, Canada M5B 2K3
David Naylor
Department of Mechanical & Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario, Canada M5B 2K3

ABSTRACT

Flow- and temperature-field photographs were obtained for natural convection in a vertical channel with antisymmetric heating. The heating is antisymmetric when the hot wall is heated above the ambient temperature by the same amount that the cold wall is cooled below the ambient, producing equal but opposite buoyancy forces. These opposite buoyancy forces can cause instability inside the channel. So the flow- and temperature fields are of interest for validation of numerical modeling. The flow field was obtained by means of smoke flow visualization using a laser sheet and a Drager tube, which supplied the aerosol. A Mach−Zehnder interferometer was used to obtain the temperature field. Results were obtained over a range of aspect ratios and Rayleigh numbers ranging from a steady laminar to an unsteady turbulent flow.


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