[1] Even though the rheology of thrust wedges is mostly frictional, a basal ductile decollement is often involved. By comparison with purely frictional wedges, such brittleductile wedges generally display anomalous structures such as backward vergence, widely spaced thrust units, and nonfrontward sequences of thrust development. Laboratory experiments are used here to study the deformation of b...

CONCLUSIONS Dynamic visual acuity (DVA) during the head-thrust test (htDVA) is reliable in normal subjects, having a high specificity for the horizontal canal, so it may be useful to monitor vestibular rehabilitation in patients with vestibular neuritis (VN). OBJECTIVE To obtain reference values for htDVA in healthy individuals and to investigate the potential application in subjects with uni...

Using force measurements and flow visualization in a water tunnel, we consider motions of a flat plate with square edges, free to pivot about its leading edge, between incidence angle limits of ±45°. The plate’s leading edge undergoes a prescribed sinusoidal motion, either of rectilinear translation, or of pivoting or waving about a fixed point 0.5 chords away from one of the plate’s wingtips. ...

Abstract This study presents results from the numerical analysis of performance Horizontal Axis Tidal Turbine under influence current various directions. The sliding mesh in ANSYS Fluent is used to simulate rotating turbine. realizable K-ε model turbulence. verified against experimental data by comparing power coefficient for velocities tidal coming zero-degree direction. After that, effects di...

* Presented as Paper IEPC-01-23 at the 27 International Electric Propulsion Conference, Pasadena, CA, 15-19 October, 2001. † Copyright © 2001 by the Electric Rocket Propulsion Society. All rights reserved. We present results from a numerical investigation of using a section of channel insulator with lower secondary electron emission coefficient to increase thrust and efficiency or reduce insula...

We demonstrate that time-periodic modulation of the nonlinearity coefficient in the discrete nonlinear Schrödinger equation strongly facilitates creation of traveling solitons in the lattice. We predict this possibility in a semi-qualitative form analytically, and test it in direct numerical simulations. Systematic computations reveal several generic dynamical regimes, depending on the amplitud...

This paper presents a methodology to determine simultaneously (a) the flow stress at high deformation rates and temperatures that are encountered in the cutting zone, and (b) the friction at the chip–tool interface. This information is necessary to simulate high-speed machining using FEM based programs. A flow stress model based on process dependent parameters such as strain, strain-rate and te...

In this work, numerical simulations are conducted to reveal the hydrodynamic mechanism of caudal fin propulsion. In the modeling of a bionic caudal fin, a universal kinematics model with three degrees of freedom is adopted and the flexible deformation in the spanwise direction is considered. Navier-Stokes equations are used to solve the unsteady fluid flow and dynamic mesh method is applied to ...

This work is a continuation of the studies interaction an elastically deformable belt with pulley presented in article. If previous flexible (link) fixed was considered, then this link leading and driven pulleys mechanism at beginning movement steady state considered. As result theoretical studies, expression obtained for coefficient characterizing phenomenon elastic sliding mechanisms friction...

, . actiristics and constraint alritudes. Conditions which favor significant improvdent are: large thrust reserve at the constraint altitude, reasonably high lift-to-drag ratio, low constraint altitude, and low wing loading. The trajectory optimization algorithm, which is described in some detail, is especially efficient and may be useful in other applications. Wing area Time, (scaled) Thrust, ...