Abstract
In multiple pipe bends where the plane of curvature changes along the pipe axis, the direction of the centrifugal force changes with each bend and the Coriolis force also acts due to the rotation of the pipe axis. The stirring effect of the secondary flow is more augmented in multiple pipe bends than that in coiled pipes. We have reported numerical analyses of the developing flow and temperature fields to establish a computational method. In the present work, the fully-developed flow field and heat transfer characteristics are investigated. When P_r is high, the heat transfer in fully-developed flow field is more enhanced than that in ordinary coiled pipes.
