In this study, the problemof nanofluid flowin a rectangular domain bounded by two moving porous walls,which
enable the fluid to enter or exit during successive expansions or contractions is solved using Least SquareMethod.
The concept of this method is briefly introduced, and it's application for this problemis studied. Then, the results
are comparedwith numerical results and the validity of these methods is shown. Graphical results are presented
to investigate the influence of the volumefraction of nanoparticle, non-dimensionalwall dilation rate and permeation
Reynolds number on the velocity, normal pressure distribution and wall shear stress. The present problem
for slowly expanding or contractingwalls withweak permeability is a simplemodel for the transport of biological
fluids through contracting or expanding vessels. The results indicate that velocity boundary layer thickness
near the walls decreases with increase of Reynolds number and nanoparticle volume friction and it increases
as non-dimensional wall dilation rate increases.
کلید واژگان :
Least Square Method Nanofluid Non-dimensional wall dilation rate Porous wall
