Experiments have been conducted on a swept wing model in low-turbulence wind tunnel at chord Reynolds number of $2.17 \times 10^{6}$ to investigate the unsteady interaction forward-facing step (FFS) with incoming stationary crossflow (CF) vortices. The impact varying FFS height development and growth primary secondary CF disturbances ensuing laminar–turbulent transition is quantified through de...

The flow separation taking place over the forward-facing step is measured by high-resolution PIV using long-range microscope. The step has height of h=10 mm and the free stream velocity is 20 m/s, resulting in a Reynolds number of Reh=13,700. Two separation bubbles are produced in the immediate upstream and downstream of the step respectively. The upstream separation has a length of 0.6h, while...

This study presents 2-D simulations of a flow-through sudden expansion/contraction micro-channel with the existence obstacles. The bottom wall is maintained at constant flux, while other walls are adiabatic. Rectangular adiabatic obstacles mounted before expansion region on upper and lower channel used. finite element method was used to discretize equations that govern physical model. Results i...

Backward-facing step (BFS) is a model that provides several applicative features in engineering. The complex phenomena of BFS flow have crucial impact on any application. Therefore, this study comprehensively investigates the characteristics with various shapes. backward-facing (F-BFS) fillets were tested at intervals Reynolds number 50 smaller than Re 400 using CFD approach. Based computationa...

Laser-Doppler velocity measurements adjacent to the bounding walls of three-dimensional (3-D) backward-facing step flow are performed for the purpose of mapping the boundaries of the reverse flow regions that develop in this geometry (adjacent to the sidewalls, the flat wall and the stepped wall) as a function of the Reynolds number. The backward-facing step geometry is configured by a step hei...

Heat transfer and laminar air flow over a double backward-facing step numerically studied in this paper. The simulations was performed by using ANSYS ICEM for meshing process and using ANSYS fluent 14 (CFD) for solving. The k-ɛ standard model adopted with Reynolds number varied between 98.5 to 512 and three step height at constant heat flux (q=2000 W/m2). The top of wall and bottom of upstream ...