Mass transfer to a rotating sphere in a stream.

Abstract

The local and average mass transfer coefficients to a rotating sphere were measured by electrochemical method, when the angle α between the axis of rotation and the direction of the uniform stream were both 45° and 90°. For measurements of the local mass transfer rates, circular isolated electrodes of 2 mm dia. were used, and the time averaged values and the variations of the local mass transfer rates were obtained by processing the signals from each isolated electrode during some revolutions. Moreover, on the basis of the measurements of average mass transfer coefficients, new empirical equations were obtained with which they have been correlated well for α=0°, 45° and 90°.