Journal of Fluids Engineering: Recent submissions
Now showing items 1401-1420 of 9024
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Control of Vortex Shedding Using a Screen Attached on the Separation Point of a Circular Cylinder and Its Effect on Drag
(The American Society of Mechanical Engineers (ASME), 2017)The control of flow in the wake of a circular cylinder by an attached permeable plate having various porosity ratios was analyzed experimentally using both particle image velocimetry (PIV) and dye visualization techniques. ... -
Characterization of a Commercial Synthetic Jet Actuator for Air Quality Applications
(The American Society of Mechanical Engineers (ASME), 2017)In this study, a commercial electromagnetic synthetic jet actuator (SJA) was characterized to determine its flow patterns and sphere of influence within a room. Its axisymmetry was also evaluated. The objective of this ... -
Numerical Investigation of Vortex Ring Ground Plane Interactions
(The American Society of Mechanical Engineers (ASME), 2017)The interaction between multiple laminar thin vortex rings and solid surfaces was studied numerically so as to investigate flow patterns associated with near-wall flow structures. In this study, the vortex–wall interaction ... -
Impact of Hydrofoil Material on Cavitation Inception and Desinence
(The American Society of Mechanical Engineers (ASME), 2017)Flow-induced vibration of hydrofoils affects pressure pulsations on their surfaces and influences cavitation inception and desinence. As these pulsations depend on the hydrofoil material, cavitation inception and desinence ... -
New Understanding of Mode Switching in the Fluidic Precessing Jet Flow
(The American Society of Mechanical Engineers (ASME), 2017)We report the first systematic investigation of the phenomenon of “switching” between the two bistable axial jet (AJ) and precessing jet (PJ) flow modes in the fluidic precessing jet (FPJ) nozzle. While geometric configurations ... -
Dissipative Effects of Bubbles and Particles in Shear Flows
(The American Society of Mechanical Engineers (ASME), 2017)Chemical reactors, air lubrication systems, and the aeration of the oceans rely, either in part or in whole, on the interaction of bubbles and their surrounding liquid. Even though bubbly mixtures have been studied at both ... -
A Study of the Effect of Various Recess Shapes on Hybrid Journal Bearing Performance Using Computational Fluid Dynamics and Response Surface Method
(The American Society of Mechanical Engineers (ASME), 2017)Hybrid bearings are mostly used in high-speed and load situations due to their better stability and loading capacity. They are typically designed with recess grooves to enhance both static and dynamic performance of the ... -
Experimental Study on the Effect of Number of Bubble Occurrences on Tip Vortex Cavitation Noise Scaling Law
(The American Society of Mechanical Engineers (ASME), 2017)A novel scaling law for the tip vortex cavitation (TVC) noise was determined, employing the Rankine vortex model, the Rayleigh–Plesset equation, the lifting surface theory, the boundary layer effect, and the number of ... -
Circular Cylinder Drag Reduction By Three-Electrode Plasma Symmetric Forcing
(The American Society of Mechanical Engineers (ASME), 2017)This study reports an efficient reduction of the drag exerted by a flow on a cylinder when the former is forced with a plasma actuator. A three-electrode plasma device (TED) disposed on the surface of the body is considered, ... -
A Validation Study of the Compressible Rayleigh–Taylor Instability Comparing the Ares and Miranda Codes
(The American Society of Mechanical Engineers (ASME), 2017)The compressible Rayleigh–Taylor (RT) instability is studied by performing a suite of large eddy simulations (LES) using the Miranda and Ares codes. A grid convergence study is carried out for each of these computational ... -
Effect of Cross Aspect Ratio on Flow in Diverging and Converging Microchannels
(The American Society of Mechanical Engineers (ASME), 2017)Aspect ratio is an important parameter in the study of flow through noncircular microchannel. In this work, three-dimensional numerical study is carried out to understand the effect of cross aspect ratio (height to width) ... -
Numerical Study of the Buoyancy Effect on Magnetohydrodynamic Three-Dimensional LiPb Flow in a Rectangular Duct
(The American Society of Mechanical Engineers (ASME), 2017)In this paper, the effect of transverse magnetic field on a laminar liquid lead lithium flow in an insulating rectangular duct is numerically solved with three-dimensional (3D) simulations. Cases with and without buoyancy ... -
On the Efficiency Alteration Mechanisms Due to Cavitation in Kaplan Turbines
(The American Society of Mechanical Engineers (ASME), 2017)A transport-equation-based homogeneous cavitation model previously assessed and validated against experimental data is used to investigate and explain the efficiency alteration mechanisms in Kaplan turbines. On the one ... -
The Comparison of Viscous Force Approximations of Smoothed Particle Hydrodynamics in Poiseuille Flow Simulation
(The American Society of Mechanical Engineers (ASME), 2017)Poiseuille flows at two Reynolds numbers (Re) 2.5 × 10−2 and 5.0 are simulated by two different smoothed particle hydrodynamics (SPH) schemes on regular and irregular initial particles' distributions. In the first scheme, ... -
Numerical Investigation of Ventilation and Human Thermoregulation for Predicting Thermal Comfort of a Rider Wearing Ventilated Helmet
(The American Society of Mechanical Engineers (ASME), 2017)Effectiveness of ventilated helmets in providing thermal comfort to a motorcycle rider is studied. Computational fluid dynamics (CFD) simulations of human thermoregulation system and the air flow in the air gap of a full-face ... -
Experimental Investigation of Sand Jets Passing Through Immiscible Fluids
(The American Society of Mechanical Engineers (ASME), 2017)Laboratory experiments were conducted to study the dynamics of sand jets passing through two immiscible fluids. Different oil layer thicknesses, nozzle diameters, and sand masses were employed. Evolution of oily sand jets ... -
Impacts of Discretization Error, Flow Modeling Error, and Measurement Noise on Inverse Transport-Diffusion-Reaction in a T-Junction
(The American Society of Mechanical Engineers (ASME), 2017)By combining a physical model and sensor outputs in an inverse transport-diffusion-reaction strategy, an accurate concentration cartography may be obtained. The paper addresses the influence of discretization errors, flow ... -
Corner Separation Dynamics in a Linear Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2017)This paper considers the inherent unsteady behavior of the three-dimensional (3D) separation in the corner region of a subsonic linear compressor cascade equipped of 13 NACA 65-009 profile blades. Detailed experimental ... -
Uncertainty Evaluation of Friction Velocity Measurements by Oil-Film Interferometry
(The American Society of Mechanical Engineers (ASME), 2017)Wind loads on structures and the wind environment around buildings are based on tests in boundary layer wind tunnels with corresponding scale parameters. The lower part of the troposphere boundary layer was simulated inside ... -
The Influence of Wing Span and Angle of Attack on Racing Car Wing/Wheel Interaction Aerodynamics
(The American Society of Mechanical Engineers (ASME), 2017)A numerical-based (Reynolds-averaged Navier–Stokes (RANS)) investigation into the role of span and wing angle in determining the performance of an inverted wing in ground effect located forward of a wheel is described, ...