The statistics of velocity fluctuations of turbulent Taylor-Couette flow are examined. The rotation rates of the inner and outer cylinders are varied while keeping the Taylor number fixed to 1.49×10(12) [O(Re)=10(6)]. The azimuthal velocity component of the flow is measured using laser Doppler anemometry. For each experiment 5×10(6) data points are acquired and carefully analyzed. Using extende...

VLSI communication networks are wire limited. The cost of a network is not a function of the number of switches required, but rather a function of the wiring density required to construct the network. This paper analyzes communication networks of varying dimension under the assumption of constant wire bisection. Expressions for the latency, average case throughput, and hot-spot throughput of k-...

The unsteady low Reynolds number aerodynamics of flapping flight was investigated experimentally through flow visualization by suspended particle imagery and wall shear stress measurement from micro-array hot-film anemometry. In conjunction, a mechanism was developed to create a flapping motion with three degrees of freedom and adjustable flapping frequency. The flapping kinematics and wing sha...

An experimental investigation of the wake of an Unmanned Aerial Vehicle (UAV) model using flow visualization techniques and a 3D Laser Doppler Anemometry (LDA) system is presented in this work. Emphasis is given on the flow field at the wingtip and the investigation of the tip vortices. A comparison of the velocity field is made with and without winglet devices installed at the wingtips. The ex...

2014 A constant temperature hot wire is located near and below a free surface. In certain conditions, oscillatory deformations of the free surface are observed. The onset temperatures and frequencies have been determined versus the distance between the wire and the surface for four different silicon oils. J. Physique 46 (1985) 1501-1506 SEPTEMBRE 1985,

This study investigates the influence of resistive pre-heating feedstock wire (here called hot-wire) on stability laser-directed energy deposition Duplex stainless steel. Data acquired online during depositions as well metallographic investigations revealed process characteristic and its window. The data, such electrical signals in circuit images captured from side-view interaction zone gave in...

The velocity and mixing field of two coaxial jet configurations has been experimentally characterized by means of hotand cold-wire anemometry to investigate the effect of the initial conditions on the flow development, and to determine the leading processes in the “mixing transition” of the two streams. Amongst the possible operating conditions, four configurations with different inner and oute...

A transient hot-wire apparatus was used to measure the thermal conductivity of argon with both steady-state and transient methods. The effects of wire diameter, eccentricity of the wire in the cavity, axial conduction, and natural convection were accounted for in the analysis of the steady-state measurements. Based on measurements on argon, the relative uncertainty at the 95 % level of confiden...