Journal of Fluids Engineering: Recent submissions
Now showing items 3021-3040 of 9024
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Experiments on Bounded Vortex Flows and Related Particle Transport
(The American Society of Mechanical Engineers (ASME), 2011)The flow field generated by the combination of a downward-oriented annular slot jet with a circumferential velocity component and a suction port in the space between two horizontal planes is ... -
Transition to Turbulence in Accelerating Pipe Flow
(The American Society of Mechanical Engineers (ASME), 2011)A uniformly accelerated laminar flow in a pipe, initially at rest, is analyzed. The acceleration increases the critical Reynolds number remarkably. New experimental findings are used to describe ... -
Effects of Schmidt Number on Turbulent Mass Transfer Around a Rotating Circular Cylinder
(The American Society of Mechanical Engineers (ASME), 2011)Characteristics of turbulent mass transfer around a rotating circular cylinder have been investigated by Direct Numerical Simulation. The concentration field was computed for three different cases ... -
Magnetohydrodynamic Turbulence Decay Under the Influence of Uniform or Random Magnetic Fields
(The American Society of Mechanical Engineers (ASME), 2011)We perform direct numerical simulations of decaying magnetohydrodynamic turbulence subject to initially uniform or random magnetic fields. We investigate the following features: (i) kinetic–magnetic ... -
Numerical Simulation of Three-Dimensional Cavitation Around a Hydrofoil
(The American Society of Mechanical Engineers (ASME), 2011)Cavitation around a hydrofoil has significant three-dimensional features. The full cavitation model and a RNG k−ɛ turbulence model with a modified turbulence viscosity coefficient and which related ... -
Pulsatile Poiseuille Flow of a Viscoplastic Fluid in the Gap Between Coaxial Cylinders
(The American Society of Mechanical Engineers (ASME), 2011)Several materials that are of interest in engineering present a yield stress and behave as viscoplastic fluids. This paper investigates numerically the motion of a Bingham fluid between two ... -
Secondary-Drop-Breakup Simulation Integrated With Fuel-Breakup Simulation Near Injector Outlet
(The American Society of Mechanical Engineers (ASME), 2011)The fuel spray of an injector for automobile engines contains multiscale free surfaces: liquid films formed at the fuel-injector outlet, ligaments generated by liquid-film breakup, and droplets ... -
Flow and Particle Dispersion in Lung Acini: Effect of Geometric and Dynamic Parameters During Synchronous Ventilation
(The American Society of Mechanical Engineers (ASME), 2011)The human lung comprises about 300 million alveoli which are located on bronchioles between the 17th to 24th generations of the acinar tree, with a progressively higher population density in ... -
Modeling of Knudsen Layer Effects in Micro/Nanoscale Gas Flows
(The American Society of Mechanical Engineers (ASME), 2011)We propose a power-law based effective mean free path (MFP) model so that the Navier-Stokes-Fourier equations can be employed for the transition-regime flows typical of gas micro/nanodevices. The ... -
Particle Image Velocimetry Measurements in the Wake of a Cactus-Shaped Cylinder
(The American Society of Mechanical Engineers (ASME), 2011)The flow field past a biologically inspired cylindrical model with a cactus-shaped cross section is investigated in a wind tunnel using particle image velocimetry and surface pressure measurements ... -
Computational Fluid Dynamics Analysis of Cooling Tower Inlets
(The American Society of Mechanical Engineers (ASME), 2011)Cooling tower inlet losses are the flow losses or viscous dissipation of mechanical energy affected directly by the cooling tower inlet design, which according to the counterflow natural draft ... -
Flow Past Two Freely Rotatable Triangular Cylinders in Tandem Arrangement
(The American Society of Mechanical Engineers (ASME), 2011)In this paper we investigate the interaction of two freely rotatable triangular cylinders that are placed in tandem in a laminar flow. To study how the spacing between the two cylinders may ... -
Numerical Simulation and Evaluation of Velocity Fluctuations During Rotating Stall of a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2011)Flow instabilities like rotating stall can lead to severe vibrations in turbomachines if the eigenfrequency of the rotor is equal to the stall frequency. The goal of the present work is to ... -
Hydrodynamic Characteristics of Crossflow over MEMS-Based Pillars
(The American Society of Mechanical Engineers (ASME), 2011)A parametric study was performed to reveal the hydrodynamic processes controlling crossflow over MEMS-based micro pin fin devices. Pressure drop experiments were conducted and used to obtain ... -
Mitigating Blockage Effects on Flow Over a Circular Cylinder in an Adaptive-Wall Wind Tunnel
(The American Society of Mechanical Engineers (ASME), 2011)The effect of wall streamlining on flow development over a circular cylinder was investigated experimentally in an adaptive-wall wind tunnel. Experiments were carried out for a Reynolds number ... -
Combined Experimental/Numerical Development of Propulsor Evaluation Capability
(The American Society of Mechanical Engineers (ASME), 2011)This paper presents a method to combine computational fluid dynamics (CFD) modeling with subscale experiments to improve full-scale propulsor performance prediction. Laboratory experiments were ... -
Experimental Investigation of the Use of Synthetic Jets for Mixing in Vessels
(The American Society of Mechanical Engineers (ASME), 2011)Mixing is an important process in various industries. Different designs have been suggested in order to reduce the local shear rates in mechanically stirred mixing vessels, also known as ... -
Experimental Analysis, Modeling, and Control of Volumetric Radial-Piston Pumps
(The American Society of Mechanical Engineers (ASME), 2011)An experimental-theoretical study has been carried out on high-pressure volumetric radial-piston pumps for diesel fuel injection systems. The dependence of the pump inducted flow rate on speed ... -
Liquid Turbulence Kinetic Energy Budget of Co-Current Bubbly Flow in a Large Diameter Vertical Pipe
(The American Society of Mechanical Engineers (ASME), 2011)The liquid turbulence kinetic energy transfer between the liquid and gas phases was investigated for upward air-water bubbly flow in a 200 mm diameter pipe. The liquid and gas axial momentum ... -
Flow Regime Identification in Boiling Two-Phase Flow in a Vertical Annulus
(The American Society of Mechanical Engineers (ASME), 2011)This work describes the application of an artificial neural network to process the signals measured by local conductivity probes and classify them into their corresponding global flow regimes. ...