We have used computational fluid dynamics to study changes in lift generation and vortex dynamics for Reynolds numbers (Re) between 8 and 128. The immersed boundary method was used to model a two-dimensional wing through one stroke cycle. We calculated lift and drag coefficients as a function of time and related changes in lift to the shedding or attachment of the leading and trailing edge vort...

This study focuses on the effects of vegetation patch density, bed condition, and incoming sediment flow structure morphology within around a patch. The variation in upstream adjustment velocity is not well defined for low-density patches but decreases with increasing density high-density patches. length region greater vegetation. Incoming causes reduction both steady wake at low density. recov...

The three-dimensionality of the velocity field in the wake of a circular cylinder has excited considerable interest and debate over the past decade. Presented here are experimental results that characterize the underlying vorticity field of such wakes. Using particle image velocimetry (PIV), instantaneous velocity fields were measured and from these the vorticity of the longitudinal vortices ly...

Abstract This work investigates time-dependent ferrofluid flow past in a cylinder the presence of 10 kilo-ampere per meter magnetic field. The Reynolds number is about hundred to keep laminar and it high enough form von Karman vortex street. study presents results for velocity distributions, pressure lift coefficient, drag coefficient under influence stationary These are compared with absence f...

This work presents the results of numerical modeling Karman vortex street generation performed with ANSYS/FLUENT package application. The influence mechanical elements located downstream bluff body on frequency has been found during earlier laboratory investigations. Five various geometrical configurations have tested. Considerable differences in pictures distributions pressure, horizontal and ...

In this paper, vortex shedding and suppression are numerically investigated as autonomous non-autonomous dynamical systems respectively. Lagrangian coherent structures (LCSs) used a numerical tool to analyze these systems. These ridges of Finite time Lyapunov exponent (FTLE) which act material surfaces that transport barriers within the flow. Initially, utility LCSs is explored for revealing Fi...