in this work, the blasius equation is studied. homotopy perturbation method (hpm) and homotopy analysis method (ham) are applied to obtain its solution. comparison with variational iteration method (vim) is made to highlight the significant features of employed methods and their capability of handling nonlinear problems. the outcome shows the success of (hpm) and (ham) for solving nonlinear pro...

Experiments are performed using dry and humid air to ascertain the effect of humidity on the performance of a plasma actuator in flight conditions. These actuators are becoming popular in controlling flow about low to moderate speed aerospace vehicles. These experiments are performed at a new Test Facility of the Computational Plasma Dynamics Laboratory (CPDL) in Kettering University. A blow-do...

The development of wall shear stress in Görtler vortex flow was investigated by hot-wire measurements. The wavelengths of the vortices were pre-set by thin vertical perturbation wires so to produce the most amplified wavelengths. Three different vortex wavelengths of 12 mm, 15 mm, and 20 mm were considered, and near-wall velocity measurements were carried out to obtain the “linear” layers of ve...

In this paper, a new approach is introduced to solve Blasius equation using parameter identification of a nonlinear function which is used as approximation function. Bees Algorithm (BA) is applied in order to find the adjustable parameters of approximation function regarding minimizing a fitness function including these parameters (i.e. adjustable parameters). These parameters are determined ho...

Direct numerical simulation is used to investigate the nature and behaviour of steady spanwise flow modulations excited internally in the Blasius boundary layer, primarily for a Reynolds number based on the displacement thickness ( Æ ) greater than 1,600. Both types of disturbances known – -/streak-/Klebanoff modes or longitudinal vortex modes – exhibit a periodic spanwise variation, but the -m...

A turbulent potential model is applied to predict the transition in boundary flows. Without assuming any constitutive relation between the turbulence and mean flow variables, this model has the ability to accurately predict strong non-equilibrium flows, but the computation cost for this is only comparable to two equation models and so is the model complexity. Model predictions for a number of t...