Abstract

This study investigates the influence of temperature-dependent physical properties in drag-reduced flow to clarify at which location temperature should be changed in order to contribute to drag reduction, by effecting wall beating so as to arrange a vertically and longitudinally "non-isothermal field" in channel flow. Temperature profiles have been measured by a fine thermocouple probe. Non-isothermal Field causes fluctuation of pressure gradient. Temperature profiles was changed by Non-isothermal field.

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