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THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer
September, 15-18, 2015, Sarajevo, Bosnia and Herzegovina

DOI: 10.1615/ICHMT.2015.THMT-15


ISBN Print: 978-1-56700-427-4

ISBN CD: 978-1-56700-428-8

Heat transfer characteristics of viscoelastic fluid in transitional flow through a serpentine channel

pages 139-142
DOI: 10.1615/ICHMT.2015.THMT-15.150
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SINOPSIS

The local heat transfer, pressure loss and flow characteristics of the viscoelastic fluid through a serpentine channel under transition and developed flow conditions are described in this study. The flow of such fluid and channel is unsteady and accompany longitudinal vortices-like secondary flows even under low Reynolds number condition of Re ~ 1. This is mainly due to the normal stress differences produced by the viscoelasticity of the fluid. The vortex structures changed depending on the streamwise position and Weissenberg number in which three transition stages were observed: a pair of moderate vortices, a single vortex with a drift of main flow toward the wall, and a pair of strong vortices. These vortices affected the local heat transfer characteristics at the top, bottom and side walls, the streamwise distributions, and unsteady flow characteristics. In the full paper, detail discussions on these measurements are made to understand the cause of the flows and to reorganize and regress the data with the non-dimensional fluid parameters.

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