Rotating convection is analysed numerically in a cylinder of aspect ratio one, for Prandtl number about 7. Traditionally, the problem has been studied within the Boussinesq approximation with density variation only incorporated in the gravitational buoyancy term and not in the centrifugal buoyancy term. In that limit, the governing equations admit a trivial conduction solution. However, the cen...

investigation on local scour phenomenon downstream of impinging jets is very complicated. different parameters such as geometry of stream, characteristics of flow and sediments have great influences on the scour phenomenon. the present study is preceded to numerical modeling of scouring by impinging jet via ssiim 2 model founded on a physical model tests. the numerical model is calibrated for r...

Invited ta Accelerator Ph 2, 2004. Correspond E-mail addr Work suppo contract numbe Support by gratefully ackno cations of parallel computational methods to charged-particle beam dynamics A. Kabel , Y. Cai, M. Dohlus, T. Sen, R. Uplenchwar Stanford Linear Accelerator Center, 2575 Sand Hill Road, Menlo Park, CA 94025, USA Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, D-22603 Hamburg, Germ...

6. Thrust power (= drag power) calculated using Lighthill's small amplitude bulk momentum model was two to three times the theoretical minimum of a flat plate of equivalent length and area moving parallel to the flow with a presumed turbulent boundary layer. 7. Froude efficiency increased with swimming speed, and it is shown that this is the usual relationship for fish studied so far. Froude ef...

Abstract Mars atmospheric global circulation models exhibit transonic jet streaks during northern winter, which motivates this study of the Mach number, Ma (the ratio flow speed to sound), and Froude Fr buoyancy waves), as a function season location. Two reanalyses spanning Years (MY) 24 32 are used input, EMARS OpenMARS. The study’s vertical coordinate is potential temperature, θ , ranging fro...

A mathematically defined Wigley hull form is used to investigate the application of a commercial CFD code in prediction of the total resistance and its components from tangential and normal forces on the hull wetted surface. The computed resistance and wave profiles alongside the hull were compared with experimental observations for six different Froude numbers to validate the simulations. The ...

In an experiment on thin flat strips falling through a fluid in a vertical cell, two fundamental motions are observed: side-to-side oscillation (flutter) and end-over-end rotation (tumble). At high Reynolds number, the dimensionless similarity variable describing the dynamics is the Froude number Fr, being the ratio of characteristic times for downward motion and pendular oscillations. The tran...

Undular hydraulic jumps are illustrated by a smooth rise of the free surface followed by a train of stationary waves. They are sometimes experienced in natural waterways and rivers. The characteristics of undular hydraulic jumps are studied here. The height, amplitude and the main characteristics of undular jump is depended on the upstream Froude number and aspect ratio. The experiments were do...