The present study aims to identify effects due to uncertainties of thermal conductivity and
dynamic viscosity of nanofluid on boundary layer flow and heat transfer characteristics due
to permeable stretching tube in the presence of heat source/sink. Water-based nanofluid
containing various volume fractions of different types of nanoparticles is used. The nanoparticles
used are Cu, Ag, CuO, and TiO2. Four models of thermal conductivity and dynamic
viscosity depending on the shape of nanoparticles are considered. The results are presented
to give a parametric study showing influences of various dominant parameters such as
Reynolds number, the suction/injection parameter, solid volume fraction of nanoparticles,
type of nanoparticles, the heat generation/absorption parameter and skin friction coefficient.
The results indicate that the skin friction coefficient decreases as the Reynolds number
and the suction/injection parameter (c) increase, while the local Nusselt number
increases as the Reynolds number and the suction/injection parameter (c) increase. The
results are compared with another published results and it found to be in excellent
agreement.