Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Boundary layer flow past a stretching/shrinking surface beneath an external uniform shear flow with a convective surface boundary condition in a nanofluid | Yacob et al. Nanoscale Research Letters 2011 6 314 http content 6 1 314 o Nanoscale Research Letters a SpringerOpen Journal NANO IDEA Open Access Boundary layer flow past a stretching shrinking surface beneath an external uniform shear flow with a convective surface boundary condition in a nanofluid Nor Azizah Yacob1 Anuar Ishak2 Ioan Pop3 and Kuppalapalle Vajravelu4 Abstract The problem of a steady boundary layer shear flow over a stretching shrinking sheet in a nanofluid is studied numerically. The governing partial differential equations are transformed into ordinary differential equations using a similarity transformation before being solved numerically by a Runge-Kutta-Fehlberg method with shooting technique. Two types of nanofluids namely Cu-water and Ag-water are used. The effects of nanoparticle volume fraction the type of nanoparticles the convective parameter and the thermal conductivity on the heat transfer characteristics are discussed. It is found that the heat transfer rate at the surface increases with increasing nanoparticle volume fraction while it decreases with the convective parameter. Moreover the heat transfer rate at the surface of Cu-water nanofluid is higher than that at the surface of Ag-water nanofluid even though the thermal conductivity of Ag is higher than that of Cu. Introduction Blasius 1 was the first who studied the steady boundary layer flow over a fixed flat plate with uniform free stream. Howarth 2 solved the Blasius problem numerically. Since then many researchers have investigated the similar problem with various physical aspects 3-6 . In contrast to the Blasius problem Sakiadis 7 introduced the boundary layer flow induced by a moving plate in a quiescent ambient fluid. Tsou et al. 8 studied the flow and temperature fields in the boundary layer on a continuous moving surface both analytically and experimentally and verified the results obtained in 7 . Crane 9 extended this concept to a stretching plate
