The transitional boundary layer flow over a flat plate is investigated. The boundary layer flow is known to develop unstable Tollmien-Schlichting waves above a critical value of the Reynolds number. However, it is also known that this transition can be observed for sub-critical Reynolds numbers. In that case the basin of attraction of the laminar state coexists with the sustained turbulence. In...

one of the popular and well known models in boundary layer that is implemented in most of the operational and familiar models is the mellor-yamada model of atmospheric boundary layer. one reason that this model is so popular is its ability in simulations and exposing of different phenomena in the boundary layer. this model has been constructed based on second order closure hypothesis. beside al...

An experimental investigation on the flow topology over a rotor operating at low Reynolds numbers is presented. The feasibility of laminar to turbulent transition experiments small rotors demonstrated. Phase-locked infrared thermography coupled with simultaneous force and torque measurements were used study three bladed NACA0012 aerofoil section set uniform angle incidence 10°. Boundary layer w...

Phase effect on the modal interaction of flow instabilities is investigated for laminar-to-turbulent transition in a flat-plate boundary-layer flow. Primary and secondary three-dimensional (3-D) oblique waves at various initial phase differences between these two instability modes. Three numerical methods are used systematic approach entire process, i.e. before onset well into fully turbulent F...

Abstract