By means of He's homotopy perturbation method
(HPM) an approximate solution of velocity eld is derived for the
ow in straight pipes of non-Newtonian
uid obeying the Sisko
model. The nonlinear equations governing the
ow in pipe are for-
mulated and analyzed, using homotopy perturbation method due
to He. Furthermore, the obtained solutions for velocity eld is
graphically sketched...
