Thermal radiation mixed convection boundary-layer flow in tightly coiled curved pipe for large Richardson number

Abstract

The characteristics of radiative mixed convection boundary-layer flow generated close to the inner walls of tightly coiled curved pipe for full range of Richardson number is investigated. In order to find numerical solutions the governing coupled, non-linear PDE are transformed into convenient form for integration by using primitive variable formulation. From this transformation the terms highest powers of Dean number are retained into boundary-layer form and then solved numerically by using finite difference method. Expressions for the axial and transverse components of skin friction, heat transfer coefficient, and flux thicknesses for various values of Richardson number, , angle, α, curvature of the pipe, Planck number, R d , and Prandtl number are obtained and given graphically.