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ISSN Online: 2377-424X

International Heat Transfer Conference 4
August 31 - September 5, 1970, Paris-Versailles, France

A THERMAL ANALOG FOR FREE CONVECTION WITH A "GRAVITY GRADIENT"

Get access (open in a dialog) DOI: 10.1615/IHTC4.3380
pages 1-10

Resumo

The analog consists of a horizontal heated isothermal bar so shaped as to cause the acceleration (effective gravitational component) to vary linearly with distance along its surface. This is accomplished by machining the bar to fit the. equation ± x = y √(A/y -1) + A arc tan (l/√(A/y - 1)), where x is the horizontal coordinate, y is the vertical coordinate, and A is a positive constant of linear dimension. The longitudinal z axis is also horizontal. Thermal measurement and interferometric examination of the laminar boundary layer with several such bars in air yield results which are in good agreement with earlier theoretical solutions for free convection to a flat plate subject to a spatially varying acceleration.