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International Journal of Fluid Mechanics Research

ISSN for PRINT: 1064-2277

Institutional price:	$1811.00
Issues per year:	6

Best Paper Award Selection - Editorial Board Site

2003, Volume30

123 pages

DOI: 10.1615/InterJFluidMechRes.v30.i1

Issue price - $250.00

Investigation of Forsed Convection in an Almost Circular Microtube with Rough Walls

D. A. Nield
Department of Engineering Science, University of Auckland, Private Bag 92019, Auckland, New Zealand

A. V. Kuznetsov
Department of Mechanical and Aerospace Engineering, North Carolina State University, Campus Box 7910, Raleigh, NC 27695-7910, USA

ABSTRACT

Steady laminar flow of an incompressible fluid through a tube of almost circular cross-section is examined analytically, first for the case of a tube whose wall is wavy in the azimuthal direction, and then for one wavy in the axial direction. For the first case, a complete solution of the flow and forced convection heat transfer (for constant flux at the boundary) is possible for a wall of arbitrary cross-section. It is shown that, for a fixed axial pressure gradient, any departure from circularity leads to a reduction in volume flux and a reduction in heat transfer. For the second case no simple analytic solution is possible, but estimates of the increase in resistance due to a departure from circularity have been made.