Effects of bouyancy on laminar flow in curved elliptic ducts Conference

Dong, ZF, Ebadian, MA. (1991). Effects of bouyancy on laminar flow in curved elliptic ducts . American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD, 163 61-69.

cited authors

  • Dong, ZF; Ebadian, MA

abstract

  • This paper numerically investigates the effects of buoyancy on fully developed laminar flow in a curved duct of elliptic cross-section. The flow of Newtonian fluids is assumed steady in terms of the Boussinesq approximation. The curved elliptic duct is subjected to thermal boundary conditions of axially uniform heat flux and peripherally uniform wall temperature. The numerically generated boundary-fitted coordinate system is applied to discretize the solution domain of the elliptic duct, and the Navier-Stokes equations and the energy equation, including the curvature ratio, are solved by use of the control volume-based finite difference method. The solution covers a wide range of curvature ratios, and Dean and Grashof numbers. The results presented are displayed graphically and in tabular form to illustrate the influence of buoyancy. It is further shown that buoyancy acts to increase both the Nusselt number and friction factor and to change the distribution of velocity and temperature.

authors

publication date

  • January 1, 1991

published in

start page

  • 61

end page

  • 69

volume

  • 163