TY - JOUR
TI - Thermal radiation mixed convection boundary layer flow in tightly coiled curved pipe for large Richardson number
AU - Ashraf Muhammad
AU - Yasmeen Robina
AU - Ahmad Masud
JN - Thermal Science
PY - 2018
VL - 22
IS - 1
SP - 147
EP - 156
PT - Article
AB - 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 λ is investigated. In order to find numerical  solutions the governing coupled, nonlinear partial differential equations are  transformed into convenient form for integration by using Primitive Variable  Formulation. From this transformation the terms highest powers of Dean Number  (D=δ1/2Re)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 λ, angle α, curvature of the pipe  (tightly coiled pipe in which 0<δ<1), Plank Number Rd and Prandtl Number Pr  are obtained and given graphically.