Experimental heat transfer measurements for pulsatile flow in baffled tubes

Abstract We report experimental heat transfer measurements for the flow of a lubricating oil on the tube side of a shell and tube heat exchanger. Results are reported for the case where there is a steady net flow through the smooth walled tube and where periodically spaced baffles have been inserted. Results are also reported when flow oscillations are superimposed on the net flow. A significant increase in the Nusselt number is reported for the system when both flow oscillation and baffles are present.