Wang, G.; Vanka, S. P. Convective heat transfer in periodic wavy passages. (English) Zbl 0922.76099 Int. J. Heat Mass Transfer 38, No. 17, 3219-3230 (1995). Summary: The rates of heat transfer for flow through a periodic array of wavy passages are studied with an accurate numerical scheme. The flow was observed to be steady until Re around 180 after which self-sustained oscillatory flow was observed. The self-sustained oscillations lead to the destabilization of laminar thermal boundary layers, replenish the near-wall fluid with the fluid in the core region, and thus provide a natural mechanism of heat and mass transfer enhancement. In the steady-flow regime, the average Nusselt numbers for the wavy wall channel were only slightly larger than those for a parallel-plate channel. On the other hand, in the transitional-flow regime, the enhancement of heat transfer was about a factor of 2.5. Friction factors for the wavy channel were about twice those for the parallel-plate channel in the steady-flow region, and remained almost constant in the transitional regime. Cited in 14 Documents MSC: 76D05 Navier-Stokes equations for incompressible viscous fluids 76M20 Finite difference methods applied to problems in fluid mechanics 80A20 Heat and mass transfer, heat flow (MSC2010) PDF BibTeX XML Cite \textit{G. Wang} and \textit{S. P. Vanka}, Int. J. Heat Mass Transfer 38, No. 17, 3219--3230 (1995; Zbl 0922.76099) Full Text: DOI OpenURL