Journal of Fluids Engineering: Recent submissions
Now showing items 3701-3720 of 9024
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LES Study of the Influence of a Train-Nose Shape on the Flow Structures Under Cross-Wind Conditions
(The American Society of Mechanical Engineers (ASME), 2008)Cross-wind flows around two simplified high-speed trains with different nose shapes are studied using large-eddy simulation (LES) with the standard Smagorinsky model. The Reynolds number is ... -
Wall-Modeled Large-Eddy Simulations of Flows With Curvature and Mild Separation
(The American Society of Mechanical Engineers (ASME), 2008)The performance of wall-modeled large-eddy simulation (WMLES) based on hybrid models, in which the inner region is modeled by Reynolds-averaged Navier–Stokes (RANS) equation and the outer region ... -
Prediction of Dynamic Stall Onset for Oscillatory Low-Speed Airfoils
(The American Society of Mechanical Engineers (ASME), 2008)This research presents some common features of oscillatory airfoils, and the method for indicating dynamic stall onset for the unsteady process. Under deep stall conditions, the stall-onset angle ... -
Performance Characteristics of a Microscale Ranque–Hilsch Vortex Tube
(The American Society of Mechanical Engineers (ASME), 2008)The results of an experimental investigation of the energy separation performance of a microscale Ranque–Hilsch vortex tube are presented. The supply channel Reynolds number of a microscale ... -
Microscale Flow Through Channels With a Right-Angled Bend: Effect of Fillet Radius
(The American Society of Mechanical Engineers (ASME), 2008)Microscale gas flow through channels with a right-angled bend has been numerically analyzed to study the effect of the fillet radius on flow characteristics. The flow is assumed to be ... -
Numerical Analysis on the Start-Up Flow Past a Resonant Cavity
(The American Society of Mechanical Engineers (ASME), 2008)This paper presents the results of a computational analysis on a three-dimensional unsteady flow inside a resonant cavity. The cavity was fully immersed in a channel flow, had a squared cross ... -
The Influence of Viscous Effects and Physical Scale on Cavitation Tunnel Contraction Performance
(The American Society of Mechanical Engineers (ASME), 2008)The general performance of an asymmetric cavitation tunnel contraction is investigated using computational fluid dynamics (CFD) including the effects of fluid viscosity and physical scale. The ... -
Computational Towing Tank Procedures for Single Run Curves of Resistance and Propulsion
(The American Society of Mechanical Engineers (ASME), 2008)A procedure is proposed to perform ship hydrodynamics computations for a wide range of velocities in a single run, herein called the computational towing tank. The method is based on solving ... -
Estimation of Cavitation Limits From Local Head Loss Coefficient
(The American Society of Mechanical Engineers (ASME), 2008)Cavitation effects in valves and other sudden transitions in water distribution systems are studied as their better understanding and quantification is needed for design and analysis purposes and ... -
Effect of Slip on the Entropy Generation From a Single Rotating Disk
(The American Society of Mechanical Engineers (ASME), 2008)In this study, it is the first time that the effect of slip on the entropy generation is investigated for the flow over a rotating single free disk. The problem is considered for steady ... -
A General Macroscopic Turbulence Model for Flows in Packed Beds, Channels, Pipes, and Rod Bundles
(The American Society of Mechanical Engineers (ASME), 2008)This study focuses on Nakayama and Kuwahara’s two-equation turbulence model and its modifications, previously proposed for flows in porous media, on the basis of the volume averaging theory. ... -
A Parametric Study of Passive Flow Control for a Short, High Area Ratio 90deg Curved Diffuser
(The American Society of Mechanical Engineers (ASME), 2008)This paper represents the results of an experimental program with the aim of controlling the flow in a highly unstable 90deg curved diffuser. The diffuser, which is an integral part of an ... -
Thermodynamic Effect on Cavitation Performances and Cavitation Instabilities in an Inducer
(The American Society of Mechanical Engineers (ASME), 2008)Based on the length of the tip cavitation as an indication of cavitation, we focused on the effect of thermodynamics on cavitation performances and cavitation instabilities in an inducer. ... -
Head Drop of a Spatial Turbopump Inducer
(The American Society of Mechanical Engineers (ASME), 2008)A computational fluid dynamics model for cavitation simulation was investigated and compared with experimental results in the case of a three-blade industrial inducer. The model is based on a ... -
On the Preliminary Design and Noncavitating Performance Prediction of Tapered Axial Inducers
(The American Society of Mechanical Engineers (ASME), 2008)A reduced order model for preliminary design and noncavitating performance prediction of tapered axial inducers is illustrated. In the incompressible, inviscid, irrotational flow approximation, the ... -
PIV Study of Adverse and Favorable Pressure Gradient Turbulent Flows Over Transverse Ribs
(The American Society of Mechanical Engineers (ASME), 2008)This paper reports an experimental study of the combined effects of rib roughness and pressure gradient on turbulent flows produced in asymmetric converging and diverging channels. Transverse ... -
Turbulence Structure Modification and Drag Reduction by Microbubble Injections in a Boundary Layer Channel Flow
(The American Society of Mechanical Engineers (ASME), 2008)Turbulent boundary layer modification in a channel flow using injection of microbubbles as a means to achieve drag reduction was studied. The physical mechanism of this phenomenon is not yet ... -
Strategies for Simulating Flow Through Low-Pressure Turbine Cascade
(The American Society of Mechanical Engineers (ASME), 2008)Laminar separation on the suction side of low-pressure turbine blades at low Reynolds number operating conditions deteriorates overall engine performance and has to be avoided. This requirement ... -
Optical Diffusometry Techniques and Applications in Biological Agent Detection
(The American Society of Mechanical Engineers (ASME), 2008)Optical diffusometry is a technique used for measuring diffusion. This work explores the possibility of directly measuring diffusion coefficients of submicron particles for pathogen detection. The ... -
The Effect of Reynolds Number on Microaxial Flow Fan Performance
(The American Society of Mechanical Engineers (ASME), 2008)Microscale axial flow fans were investigated in response to the growing cooling requirements of the electronics industry. The two main challenges of this investigation were manufacture of a fully ...