Forced convection heat transfer from an elliptical cylinder to power-law fluids

Bharti, R. P. ; Sivakumar, P. ; Chhabra, R. P. (2008) Forced convection heat transfer from an elliptical cylinder to power-law fluids International Journal of Heat and Mass Transfer, 51 (7-8). pp. 1838-1853. ISSN 0017-9310

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Forced convection heat transfer to incompressible power-law fluids from a heated elliptical cylinder in the steady, laminar cross-flow regime has been studied numerically. In particular, the effects of the power-law index (0.2≤n≤1.8), Reynolds number (0.01≤Re≤40), Prandtl number (1≤Pr≤100) and the aspect ratio of the elliptic cylinder (0.2≤E≤5) on the average Nusselt number (Nu) have been studied. The average Nusselt number for an elliptic cylinder shows a dependence on the Reynolds and Prandtl numbers and power-law index, which is qualitatively similar to that for a circular cylinder. Thus, heat transfer is facilitated by the shear-thinning tendency of the fluid, while it is generally impeded in shear-thickening fluids. The average Nusselt number values have also been interpreted in terms of the usual Colburn heat transfer factor (j). The functional dependence of the average Nusselt number on the dimensionless parameters (Re, n, Pr, E) has been presented by empirically fitting the numerical results for their easy use in process design calculations.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Power-law Fluids; Elliptical Cylinder; Nusselt Number; Reynolds Number; Prandtl Number; Shear-thinning; Shear-thickening
ID Code:78504
Deposited On:20 Jan 2012 04:31
Last Modified:20 Jan 2012 04:31

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