TY - JOUR
TI - Unsteady mixed convection flow from a slender cylinder due to impulsive change in wall velocity and temperature
AU - Patil P M
AU - Pop I
JN - Thermal Science
PY - 2013
VL - 17
IS - 4
SP - 1023
EP - 1034
PT - Article
AB - An unsteady mixed convection flow of a viscous incompressible fluid over a  non-permeable linear stretching vertical slender cylinder is considered to  investigate the combined effects of buoyancy force and thermal diffusion. It  is assumed that the slender cylinder is in line with the flow. The  unsteadiness in the flow and temperature fields is caused due to the  impulsive change in the wall velocity and wall temperature of linearly  stretching vertical slender cylinder. The effect of surface curvature is also  taken into account, particularly for the applications as wire and fiber  drawing where exact predictions are expected. The governing boundary layer  equations are transformed into a non-dimensional form by a group of  non-similar transformations. The resulting system of coupled non-linear  partial differential equations is solved by an implicit finite difference  scheme in combination with the quasi-linearization technique. Numerical  computations are performed to understand the physical situations of linear  stretching surface for different values of parameters to display the velocity  and temperature profiles graphically. The numerical results for the local  skin-friction coefficient and local Nusselt number are also presented.  Present results are compared with previously published work and are found to  be in excellent agreement.