Heat Transfer from a Rotating Tube with Controlled Fluid Flow

The effect of rotating a tube on its axis while separate fluids flow inside and out, these fluids being discouraged from following the rotation of the tube, has been studied both from the standpoint of heat transfer and in order to ascertain the flow pattern associated with this heat transfer. Very high heat-transfer coefficients can be obtained in this way indicating that highly turbulent flow is achieved, possibly in conjunction with Taylor vortices. The heat transfer is affected far more by tube rotation than by changes in axial flow rate, and thus rotational speed is the controlling factor. Methods of measuring the temperature of the rotating tube a to fairly high degree of accuracy formed a considerable part of the experimental work.