Journal of Fluids Engineering: Recent submissions
Now showing items 3861-3880 of 9024
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Robust Implicit Multigrid Reynolds-Stress Model Computation of 3D Turbomachinery Flows
(The American Society of Mechanical Engineers (ASME), 2007)The purpose of this paper is to present a numerical methodology for the computation of complex 3D turbomachinery flows using advanced multiequation turbulence closures, including full seven-equation ... -
Evolution of Liquid Meniscus Shape in a Capillary Tube
(The American Society of Mechanical Engineers (ASME), 2007)There are still many unanswered questions related to the problem of a capillary surface rising in a tube. One of the major questions is the evolution of the liquid meniscus shape. In this ... -
Hydraulic Turbine Diffuser Shape Optimization by Multiple Surrogate Model Approximations of Pareto Fronts
(The American Society of Mechanical Engineers (ASME), 2007)A multiple surrogate-based optimization strategy in conjunction with an evolutionary algorithm has been employed to optimize the shape of a simplified hydraulic turbine diffuser utilizing ... -
Turbulent Flow Structure in a Cylinder-on-Cone Cyclone
(The American Society of Mechanical Engineers (ASME), 2007)Turbulent flow structure in a cylinder-on-cone cyclone was experimentally investigated. Measurements were conducted at a fixed geometrical swirl number. Experiments were performed at a swirl number ... -
Simulation of Contaminant Transport in a Fractured Porous Aquifer
(The American Society of Mechanical Engineers (ASME), 2007)Solute transport in the fractured porous confined aquifer is modeled by the advection-dispersion equation with fractional time derivative of order γ, which may vary from 0 to 1. Accounting for ... -
Turbulent Flow Downstream of a Perforated Plate: Sharp-Edged Orifice Versus Finite-Thickness Holes
(The American Society of Mechanical Engineers (ASME), 2007)In this study, perforated plates with sharp-edged orificed openings and finite-thickness straight openings were applied to produce nearly isotropic turbulence in a wind tunnel. At the same nominal ... -
Attainment of Flowrate Uniformity in the Channels That Link a Distribution Manifold to a Collection Manifold
(The American Society of Mechanical Engineers (ASME), 2007)A logic-based systematic method of designing manifold systems to achieve flowrate uniformity among the channels that interconnect a distribution manifold and a collection manifold has been developed, ... -
Numerical Investigation of Steady Density Currents Flowing Down an Incline Using v2¯−f Turbulence Model
(The American Society of Mechanical Engineers (ASME), 2007)The governing equations of two-dimensional steady density currents are solved numerically using a finite volume method. The v2¯−f turbulence model, based on standard k−ε model, is used for ... -
Scaling of the Wall Pressure Field Around Surface-Mounted Pyramids and Other Bluff Bodies
(The American Society of Mechanical Engineers (ASME), 2007)The turbulent flow around square-based, surface-mounted pyramids, of height h, in thin and thick boundary layers was experimentally investigated. The influence of apex angle ζ and angle of attack ... -
An Investigation of the Relationship Between Acoustic Emission, Vibration, Noise, and Cavitation Structures on a Kaplan Turbine
(The American Society of Mechanical Engineers (ASME), 2007)The goal of the study was to explain the relationship between different acoustic signals and visual appearance of cavitation. Measurements of acoustic emission, vibration, and noise were performed ... -
Nonequilibrium Molecular Dynamics Approach for Nanoelectromechanical Systems: Nanofluidics and Its Applications
(The American Society of Mechanical Engineers (ASME), 2007)Molecular dynamics (MD) simulations have been performed to provide the basic knowledge of nanofluidics and its applications at the molecular level. A nonequilibrium molecular dynamics (NEMD) code ... -
Analysis of Thermodynamic Effects on Cavitation Instabilities
(The American Society of Mechanical Engineers (ASME), 2007)The suction performance of turbopumps in cryogenic fluids is basically much better than that in cold water because of the thermodynamic effect of cavitation. However, it is not still clear how ... -
Dielectrophoretic Control of Bubble Transport in Mesochannels— Experimental Study
(The American Society of Mechanical Engineers (ASME), 2007)Using electrostatic fields to manipulate and/or pump fluids on the microscale is a promising method for the advancement in microfluidics. Preliminary analysis showed that unidirectional bubble ... -
Determination of Cavity Detachment for Sheet Cavitation
(The American Society of Mechanical Engineers (ASME), 2007)Sheet cavitation has been traditionally analyzed with ideal fluid theory that employs the cavitation number as the single parameter. However, characteristics of cavitation can significantly depend ... -
Design, Fabrication, and Characterization of a Micro Vapor-Jet Vacuum Pump
(The American Society of Mechanical Engineers (ASME), 2007)A microelectromechanical system (MEMS) vapor-jet pump for vacuum generation in miniaturized analytical systems, e.g., micro-mass-spectrometers (, , and , 2005, “ A Fully Integrated Micro Mass ... -
Influence of Reynolds Number on the Evolution of a Plane Air Jet Issuing From a Slit
(The American Society of Mechanical Engineers (ASME), 2007)Jet flows are encountered in a variety of industrial applications. Although from the points of view of manufacturing with ease and small spatial requirement it is convenient to use short slit ... -
Numerical Simulation of Vortex Shedding and Lock-in Characteristics for a Thin Cambered Blade
(The American Society of Mechanical Engineers (ASME), 2007)In this paper, vortex-shedding patterns and lock-in characteristics that vortex-shedding frequency synchronizes with the natural frequency of a thin cambered blade were numerically investigated. The ... -
Numerical Evaluation of Contemporary Low-Speed Wind Tunnel Contraction Designs
(The American Society of Mechanical Engineers (ASME), 2007)A potential flow and viscous flow solver have been coupled to produce a robust computational tool useful for the design of low-speed wind tunnel contractions. After validation against published ... -
Velocity and Pressure Measurements Along a Row of Confined Cylinders
(The American Society of Mechanical Engineers (ASME), 2007)The results of flow experiments performed in a row of confined cylinders designed to mimic a model of a prismatic gas-cooled reactor lower plenum design are presented. Pressure measurements ... -
Development-Length Requirements for Fully Developed Laminar Pipe Flow of Inelastic Non-Newtonian Liquids
(The American Society of Mechanical Engineers (ASME), 2007)In the current study, we report the results of a detailed and systematic numerical investigation of developing pipe flow of inelastic non-Newtonian fluids obeying the power-law model. We are ...