Heat Transfer Enhancement by Chaotic Advection in a Novel Sine-Helical Channel Geometry

In this paper, we present an innovative sine-helical heat exchanger whose channel geometry consists in a combination of a helically coiled geometry and a sine-wave geometry. Laminar flow is considered in the present study, with the Reynolds numbers ranging from 100 to 1400. The flow structure and the convective heat transfer in the novel heat exchanger are analyzed numerically using the finite volume method. The results are compared to those obtained with a classical helically coiled heat exchanger. It is shown that the periodic change of the centrifugal forces in the sinehelical channel breaks the flow symmetry and leads to chaotic particle trajectories