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Laminar conjugated forced convection heat transfer in curved rectangular channels. (English) Zbl 0963.76080

Summary: This paper examines fully developed laminar flow and conjugated forced convection heat transfer in curved rectangular channels. The wall average Nusselt number, \(\overline{Nu}\), is presented as a function of the wall conduction parameter, \(\phi\), the Dean number, \(De\), and the channel aspect ratio, \(\lambda\). Secondary flow streamlines for the case of \(\lambda= 1/2\) are presented to illustrate the enhanced stability in curved rectangular channels in comparison with curved square channels. A curve illustrating the relationship between \(\phi_{\text{eff}}\), defined as the value of \(\phi\) at which a constant wall temperature boundary condition can be assumed, and \(De\) is presented for several values of \(\lambda\). We also give solutions for straight channels, and find that \(\phi_{\text{eff}}\) is independent of \(\lambda\) for \(\lambda\leq 1/4\).

MSC:

76R05 Forced convection
76M12 Finite volume methods applied to problems in fluid mechanics
80A20 Heat and mass transfer, heat flow (MSC2010)
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