The generalized dual-series approach to the capacitive and inductive iris waveguide problems is presented. Currents on the iris and plots of the fields and power flow in the vicinity of the iris are given for the capacitive iris case. It is found that vortices form in the iris region when higher order scattered modes are present. The formation of these vortices and their properties will be desc...

R. N. Bisset,1,* Wenlong Wang,2 C. Ticknor,3 R. Carretero-González,4 D. J. Frantzeskakis,5 L. A. Collins,3 and P. G. Kevrekidis1,6 1Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA 2Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA 3Theoretical Division, Los Alamos National Laboratory, Lo...

In this paper the effects of rigid triangular passive vortex generators on a  hydrofoil were investigated numerically.  In the first step using the Finite Volume Method the bare hydrofoil  were modeled and the results of lift and drag coefficients were validated using experimental data. In the next step the hydrofoil armed with vortex generators was modeled and its effect on the hydrofoil perfo...

A wind tunnel investigation was performed to study the flow field over a 70° swept sharped edge delta wing model at high angles of attack. The experiments were conducted in the subsonic wind tunnel at the Department of Mechanical Engineering, Sharif University of Technology. Velocity profiles have been measured using a special pitot tube and hot wire anemometer at angles of attacks of 10 to 35 ...

The rotary energy recovery device (RERD) is an essential component in seawater desalination for decreasing the consumption of reverse osmosis plants. To research complex flow fields and mixing motion ducts a device, 3D numerical simulation was studied this work. Three-dimensional vortex structures were visualized identified based on Q criterion. effects operating condition structure parameter h...

Ship anti-rolling devices are an essential component of modern vessels. The core the Magnus effect-based ship device is a rotating cylinder, hereinafter referred to as cylinders. In this paper, fully parametric three-dimensional modeling cylinders was performed, and design space dimension reduced using Sobol optimization method while still providing accurate reliable results. generates quasi-ra...

The generation of a coherent state, supporting a large photon number, with controlled orbital-angular-momentum L = ħl (of charge l per photon) presents both fundamental and technological challenges: we demonstrate a surface-emitting laser, based on III-V semiconductor technology with an integrated metasurface, generating vortex-like coherent state in the Laguerre-Gauss basis. We use a first ord...

In response to recent U.S. Nuclear Regulatory Commission (NRC) Component Design Bases Inspection (CBDI) issues, many US nuclear power stations have been required to demonstrate that minimum submergence requirements were properly determined for flow withdrawal from various safety related storage tanks. In many cases, the licensees failed to consider a vortex allowance, or applied an inappropriat...

Triboelectric nanogenerators are aspiring energy harvesting methods that generate electricity from the triboelectric effect and electrostatic induction. This study demonstrates the harvesting of wind energy by a wind-rolling triboelectric nanogenerator (WR-TENG). The WR-TENG generates electricity from wind as a lightweight dielectric sphere rotates along the vortex whistle substrate. Increasing...