the variational principle developed by Gyarmati embodying the principl
es of non-equilibrium thermodynamics is employed to investigate the la
minar boundary layer effect on wedge flows with suction and injection.
The velocity function is assumed as a simple third-degree polynomial
and the variational principle is formulated. The hydrodynamical bounda
ry layer thickness is derived as the Euler-Lagrange equation of the va
riational principle. The velocity profiles and skin friction values we
re computed for various values of suction and injection parameter and
wedge angle parameter. The comparison of the present solution with an
available exact solution establishes the fact that the accuracy is rem
arkable.