Heat (mass) transfer in serpentine flow passage with rectangular cross-section

Detailed local heat (mass) transfer characteristics in rectangular cross-se ctioned serpentine ducts with a sharp 180 degrees turn have been measured b y the naphthalene sublimation technique, directing special attention to the influence of the flow-inlet condition on the local mass transfer. Two cont rasting flow-inlet conditions, a contracted-flow inlet and a uniform-flow i nlet, have been tested for three turn clearances in the Reynolds number of 3.5 x 10(4). The distributions of local Sherwood numbers on all the walls o f the test ducts are shown in the form of 2-D maps, and the influence of th e flow-inlet condition on the local mass transfer characteristics is examin ed in detail. (C) 2001 Elsevier Science Ltd. All rights reserved.