TY - JOUR
TI - Surface temperature and free-stream velocity oscillation effects on mixed convention slip flow from surface of a horizontal circular cylinder
AU - Ullah Zia
AU - Ashraf Muhammad
AU - Zia Saqib
AU - Ali Ishtiaq
JN - Thermal Science
PY - 2020
VL - 24
IS - 11
SP - 13
EP - 23
PT - Article
AB - The present phenomena address the slip velocity effects on mixed convection flow of electrically conducting fluid with surface temperature and free stream velocity oscillation over a non-conducting horizontal cylinder. To remove the difficulties in illustrating the coupled PDE, the primitive variable formulation for finite difference technique is proposed to transform dimensionless equations into primitive form. The numerical simulations of coupled non-dimensional equations are examined in terms of fluid slip velocity, temperature, and magnetic velocity which are used to calculate the oscillating components of skin friction, heat transfer, and current density for various emerging parameters magnetic force parameter, ξ, mixed convection parameter, λ, magnetic Prandtl number, γ, Prandtl number, and slip factor, SL. It is observed that the effect of slip flow on the non-conducting cylinder is reduced the fluid motion. A minimum oscillating behavior is noted in skin friction at each position but maximum amplitude of oscillation in heat transfer is observed at each position α = π/4 and 2π/3. It is further noticed that a fluid velocity increases sharply with the impact of slip factor on the fluid-flow mechanism. Moreover, due to frictional forces with lower magnitude between viscous layers, the rise in Prandtl number leads to decrease in skin fiction and heat transfer which is physically in good agreement.