TY - JOUR
TI - Effect of variable viscosity and suction/injection on thermal boundary layer of a non-newtonian power-law fluids past a power-law stretched surface
AU - Aziz Abe-El
AU - Salem M
AU - Fathy Rania
JN - Thermal Science
PY - 2010
VL - 14
IS - 4
SP - 1111
EP - 1120
PT - Article
AB - The analysis of laminar boundary layer flow and heat transfer of  non-Newtonian fluids over a continuous stretched surface with suction or  injection has been presented. The velocity and temperature of the sheet were  assumed to vary in a power-law form, that is u = U0xm, and Tw(x)=T4+Cxb. The  viscosity of the fluid is assumed to be inverse linear function of  temperature. The resulting governing boundary-layer equations are highly  non-linear and coupled form of partial differential equations and they have  been solved numerically by using the Runge-Kutta method and Shooting  technique. Velocity and temperature distributions as well as the Nusselt  number where studied for two thermal boundary conditions: uniform surface  temperature (b = 0) and cooled surface temperature (b = -1), for different  parameters: variable viscosity parameter θ, temperature exponent b, blowing  parameter d and Prandtl number. The obtained results show that the flow and  heat transfer characteristics are significantly influenced by these  parameters.