The method of lattice boltzmann equation(LBE) is a kinetic-based approach for fluid flow computations. In the last decade, minimal kinetic models, and primarily the LBE, have met with significant success in the simulation of complex hydrodynamic phenomena, ranging from slow flows in grossly irregular geometries to fully developed turbulence, to flow with dynamic phase transitions. In the presen...

A numerical study is conducted to understand the impact of an unsteady freestream on aerodynamic performance oscillating airfoil. The flow environment generated by placing a stationary inline circular cylinder array upstream dependence thrust with variation Reynolds numbers and Strouhal investigated, it revealed that enhances production pitching This increased was related effective increase in ...

Aims. We determine the components of the Λ-effect tensor that quantifies the contributions to the turbulent momentum transport even for uniform rotation. Methods. Three-dimensional numerical simulations are used to study turbulent transport in triply periodic cubes under the influence of rotation and anisotropic forcing. Comparison is made with analytical results obtained via the so-called mini...

The Lagrangian transport in the laminar incompressible flow a two-dimensional square cavity driven by harmonic tangential oscillation of lid is investigated numerically for wide range Reynolds and Strouhal numbers. topology fluid trajectories analyzed stroboscopic projections revealing co-existence chaotic regular Kolmogorov–Arnold–Moser (KAM) tori. pathline structure strongly depends on number...

Abstract The installation of large bypass ratio engines on classical under wing configurations may lead to shock/boundary layer interaction the lower surface, limiting flight envelope in a similar way buffet occurring suction side at high incidences transonic flight. In this study, effects surface induced by Ultra-High-Bypass-Ratio through flow nacelle are assessed means wind tunnel testing. Un...

The Lighthill acoustic analogy approach combined with Reynolds-averaged Navier Stokes is used to predict the sound generated by unsteady viscous ow past a circular cylinder assuming a correlation length of ten cylinder diameters. The twodimensional unsteady ow eld is computed using two NavierStokes codes at a low Mach number over a range of Reynolds numbers from 100 to 5 million. Both laminar o...

The wake of a yawed square cylinder undergoing steady flow was examined by employing particle image velocimetry (PIV) technique. present study is concerned with the independence principle (IP) for examining effect yaw angle (α) on velocity signals and vortical structures. normalized Strouhal number indicates that IP no longer applicable when α reaches 45°. At = 45°, distorted vorticity contour ...

The paper focuses on the investigation of unsteady effects in shock wave/boundary layer interaction. study was carried out using a flat plate model subjected to free stream Mach number 1.43 and unit Reynolds (Re1) 11.5 × 106 1/m. To generate two-dimensional disturbances laminar boundary upstream separation region, dielectric barrier discharge employed. were generated within frequency range 500 ...

Preconditioning methods have become the method of choice for the solution of flowfields involving the simultaneous presence of low Mach number flow and transonic flow regions. It is well known that these methods are important for insuring accurate numerical discretization as well as convergence efficiency over various operating conditions such as low Mach number, low Reynolds number and high St...