Heat transfer from a rotating cylinder in a uniform flow.

The local and average coefficients of heat transfer from a rotating cylinder in a uniform flow were measured by Mach-Zehnder interferometer with visual observation of flow pattern. The experiments covered the range of rotating and cross-flow Reynolds numbers (Red) from 0 to 3000. The following results were obtained. Heat transfer is not influenced by natural convection at Red > 1000. Average heat transfer coefficients of rotating cylinder are equal to the case of static cylinder in a uniform flow, when cross-flow Reynolds number is over 1000 and cross-flow Rynolds number is above rotating Reynolds number (Rer). Heat transfer from a cylinder is most declined at Rer = 2Red, and the cross-flow Reynolds number is below 1000.