Journal of Fluids Engineering: Recent submissions
Now showing items 5181-5200 of 9024
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Vortex Detachment and Reverse Flow in Pulsatile Laminar Flow Through Axisymmetric Sudden Expansions
(The American Society of Mechanical Engineers (ASME), 1999)Incompressible, steady and pulsatile flows in axisymmetric sudden expansions with diameter ratios of 1:2.25 and 1:2.00 have been simulated numerically over the ranges of time-averaged bulk Reynolds ... -
The Unsteady Pressure Field in a High Specific Speed Centrifugal Pump Impeller—Part II: Transient Hysteresis in the Characteristic
(The American Society of Mechanical Engineers (ASME), 1999)Hysteresis in a pump characteristic results from instability phenomena involving complex three dimensional flow with recirculation. The unsteady flow field on the top and bottom branches of a ... -
Crossflow Characteristics of an Oscillating Jet in a Thin Slab Casting Mould
(The American Society of Mechanical Engineers (ASME), 1999)The application of LDA to a transient 1/3 scale (500 mm wide) water model of a mould, typical of steel thin slab casting, is presented. The characteristics of a crossflow, associated with ... -
Study on Side-Jet Injection Near a Duct Entry With Various Injection Angles
(The American Society of Mechanical Engineers (ASME), 1999)Turbulent flowfields resulting from an oblique jet injecting from a rectangular side-inlet duct into a rectangular main duct with an aspect ratio 3.75 without a forced crossflow are presented ... -
Influence of the Flatness Ratio of an Automotive Torque Converter on Hydrodynamic Performance
(The American Society of Mechanical Engineers (ASME), 1999)Automotive torque converters have recently been designed with an increasingly narrower profile for the purpose of achieving a smaller axial size, which also translates into weight savings. Four ... -
Mean and Turbulence Characteristics of Three-Dimensional Wall Jet on Convex Cylindrical Surfaces
(The American Society of Mechanical Engineers (ASME), 1999)The influence of convex curvature on the mean and turbulent characteristics of three-dimensional wall jet generated from a circular orifice geometry is reported in this paper. Mild, moderate, ... -
The Unsteady Pressure Field in a High Specific Speed Centrifugal Pump Impeller—Part I: Influence of the Volute
(The American Society of Mechanical Engineers (ASME), 1999)An experimental investigation is presented regarding the unsteady pressure field within a high specific speed centrifugal pump impeller (ωs = 1.7) which operated in a double spiral volute. For ... -
The Effect of Permeability Variations on the Flow in a Heterogeneous Porous Channel Subject to Rotation
(The American Society of Mechanical Engineers (ASME), 1999)A significant effect of permeability variations on the three-dimensional fluid flow in a heterogeneous porous channel subject to rotation is presented. The results of a numerical solution to the ... -
Quintuple Hot-Wire Measurements of the Turbulence Structure in Confined Swirling Flows
(The American Society of Mechanical Engineers (ASME), 1999)The novel quintuple hot-wire measurement technique was used to perform detailed measurements of the mean velocities and Reynolds stresses in an isothermal model combustion chamber at two different ... -
Hydromagnetic Stability of Current-Induced Flow in a Small Gap Between Concentric Cylinders
(The American Society of Mechanical Engineers (ASME), 1999)A linear stability analysis has been carried out for hydromagnetic current-induced flow. A viscous electrically conducting fluid between concentric cylinders is driven electromagnetically by the ... -
Turbulent Boundary Layers Subjected to Multiple Strains
(The American Society of Mechanical Engineers (ASME), 1999)Turbomachinery flows can be extremely difficult to predict, due to a multitude of effects, including interacting strain rates, compressibility, and rotation. The primary objective of this investigation ... -
Synergistic Effects in Turbulent Drag Reduction by Riblets and Polymer Additives
(The American Society of Mechanical Engineers (ASME), 1999)Drag reduction was investigated for the combined system of polymer additives and a riblet pipe. The riblet grooves were V-shaped, the spacing of which was 1.3 mm and the height of which was ... -
An Experimental Analysis of Vortex Trapping Techniques
(The American Society of Mechanical Engineers (ASME), 1999)An experimental verification is presented for the theoretical vortex trapping concept. A suction orifice located along one wall of a water channel test section was used to simulate a point ... -
The Stress-State in a Torsion Shear Cell Filled With a Newtonian Fluid
(The American Society of Mechanical Engineers (ASME), 1999)The flow in a torsional shear cell is investigated with the purpose of finding a measure for the wall effect due to strongly nonuniform flow in the vicinity of the edge of the top platen. ... -
Drag Reduction in Laminar Flow Between Two Vertical Coaxial Cylinders
(The American Society of Mechanical Engineers (ASME), 1999)Laminar drag reduction has been shown for the flow of a Newtonian fluid in the space between two vertical coaxial cylinders. Experiments were carried out to measure the torque of a bob with ... -
Effects of Nuclei Size Distribution on the Dynamics of a Spherical Cloud of Cavitation Bubbles
(The American Society of Mechanical Engineers (ASME), 1999)The nonlinear dynamics of a spherical bubble cloud with nuclei size distribution are studied numerically. The spectrum of nuclei is assumed uniform initially. The simulations employ a nonlinear ... -
Aerodynamic Torque Acting on a Butterfly Valve. Comparison and Choice of a Torque Coefficient
(The American Society of Mechanical Engineers (ASME), 1999)Most technological devices use butterfly valves to check the flow rate and speed, through piping. Their main advantages are their low cost, their mechanical suitability for fast operation, and ... -
Monitoring Fluidization Dynamics for Detection of Changes in Fluidized Bed Composition and Operating Conditions
(The American Society of Mechanical Engineers (ASME), 1999)In many industrial applications of gas-solids fluidized beds, it is worthwhile to have an on-line monitoring method for detecting changes in the hydrodynamics of the bed (due for example to ... -
Flow Pattern Transition During Gas Liquid Upflow Through Vertical Concentric Annuli—Part I: Experimental Investigations
(The American Society of Mechanical Engineers (ASME), 1999)In the present work, extensive experiments have been carried out on air-water upflow through concentric annuli to identify the distribution of the two phases in the bubbly, slug, and churn ... -
A Model for Flows With Massive Separation
(The American Society of Mechanical Engineers (ASME), 1999)