Consider the steady, two-dimensional flow of a nanofluid near the stagnation point on a stretching sheet saturated at a porous surface (highly permeable) as shown in
Fig. 9.14 [21]. The stretching velocity
Uw(
x) and the free stream velocity
U∞(
x) are assumed to vary proportional to the distance
x from the stagnation point, that is,
Uw(
x) =
ax and
U∞(
x) =
bx, where
a and
b are constants with
a > 0 and
b ≥ 0. It is assumed that the temperature at the stretching surface takes the constant values
Tw, while the temperature of the ambient nanofluid, attained as
y tends to infinity, takes the constant values
T∞. The fluid is a water-based nanofluid containing ...