Journal of Fluids Engineering: Recent submissions
Now showing items 2261-2280 of 9024
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Visualization and Validation of Ejector Flow Field With Computational and First Principles Analysis
(The American Society of Mechanical Engineers (ASME), 2015)Passive, heat actuated ejector pumps offer simple and energyefficient options for a variety of end uses with no electrical input or moving parts. In an effort to obtain insights into ejector flow phenomena and to evaluate ... -
Drag Reduction on the 25 deg Ahmed Model Using Fluidic Oscillators
(The American Society of Mechanical Engineers (ASME), 2015)Transportation of goods and people involves moving objects through air, which leads to a force opposing motion. This drag force can account for more than 60% of power consumed by a ground vehicle, such as a car or truck, ... -
Numerical Simulation of Stirling Engines Using an Unsteady Quasi One Dimensional Approach
(The American Society of Mechanical Engineers (ASME), 2015)An existing computer code for solving the quasionedimensional (Q1D) flow equations governing unsteady compressible flow in tubes with smoothly varying cross section areas has been adapted to the simulation of the oscillatory ... -
Surface Pressures Developed on an Airfoil Undergoing Heaving and Pitching Motion
(The American Society of Mechanical Engineers (ASME), 2015)The surface pressure distributions and flow patterns developed on and around a NACA 0012 airfoil undergoing heaving and pitching were investigated at Re = 3.6 أ— 104. Despite extensive investigations conducted by ... -
Analysis and Simulation of an Oil Lubrication Pump for Internal Combustion Engines
(The American Society of Mechanical Engineers (ASME), 2015)This paper presents a simulation model of an oillubrication gerotor pump for internal combustion engines. The model was constructed by using a monodimensional commercial code that accounted for all phenomena that occur ... -
Mixing and Entrainment Characteristics in Circular Short Ejectors
(The American Society of Mechanical Engineers (ASME), 2015)Analytical and experimental investigations have been conducted to characterize the performance of “short†ejectors. In short ejectors, the core of primary (motive) flow still exists at the mixing duct exit, and nonuniform ... -
A Performance Prediction Model for Low Speed Centrifugal Fans
(The American Society of Mechanical Engineers (ASME), 2015)A generalized model for mapping the trend of the performance characteristics of a doubledischarge centrifugal fan is developed based on the work by Casey and Robinson (C&R), which formulated compressor performance maps ... -
Modeling and Simulations of the Supercavitating Vehicle With Its Tail Slaps
(The American Society of Mechanical Engineers (ASME), 2015)It is one of the most important stable motion modes to move with tailslaps for supercavitating vehicle. The periodical tailslaps provide lift and restoring moment to keep a dynamic equilibrium of the vehicle. Research on ... -
Geometry Effects on Flow Instabilities of Different Three Bladed Inducers
(The American Society of Mechanical Engineers (ASME), 2015)The paper presents the results of an activity carried out on a threebladed inducer and compares the experimental data from other similar inducers. All the inducers considered in the present study have been designed by means ... -
Benefits of Nonaxisymmetric Endwall Contouring in a Compressor Cascade With a Tip Clearance
(The American Society of Mechanical Engineers (ASME), 2015)This paper describes the design of a nonaxisymmetric hub contouring in a shroudless axial flow compressor cascade operating at near stall condition. Although an optimum tip clearance (TC) reduces the total pressure loss, ... -
Applying Contact Angle to a Two Dimensional Multiphase Smoothed Particle Hydrodynamics Model
(The American Society of Mechanical Engineers (ASME), 2015)Equilibrium contact angle of liquid drops over horizontal surfaces has been modeled using smoothed particle hydrodynamics (SPH). The model is capable of accurate implementation of contact angles to stationary and moving ... -
Euler–Lagrange Simulations of Bubble Cloud Dynamics Near a Wall
(The American Society of Mechanical Engineers (ASME), 2015)We present in this paper a twoway coupled Eulerian–Lagrangian model to study the dynamics of clouds of microbubbles subjected to pressure variations and the resulting pressures on a nearby rigid wall. The model simulates ... -
Flow Behavior of Two Dimensional Wet Foam: Effect of Foam Quality
(The American Society of Mechanical Engineers (ASME), 2015)The flow behaviors of twodimensional (2D) wet monodisperse and polydisperse foams are investigated by the quasistatic simulation. We set the same inlet velocity on the cross section of the foam channel and then focus on ... -
Investigation of the Flow Around Two Interacting Ship Like Sections
(The American Society of Mechanical Engineers (ASME), 2015)This paper reports calculations of threedimensional (3D) unsteady cross flow over two ship sections in close proximity and compares the results with measurements. The ship sections have different breadth and draft conditions ... -
Numerical Investigation of Shock Wave Attenuation by Geometrical Means: Double Barrier Configuration
(The American Society of Mechanical Engineers (ASME), 2015)Due to the increase in global terror threats, many resources are being invested in efforts to find and utilize efficient protective means and technologies against blast waves induced by conventional and nonconventional ... -
A Batchelor Vortex Model for Mean Velocity of Turbulent Swirling Flow in a Macroscale Multi Inlet Vortex Reactor
(The American Society of Mechanical Engineers (ASME), 2015)The velocity field in a macroscale multiinlet vortex reactor (MIVR) used in “flash nanoprecipitation (FNP)†process for producing functional nanoparticles was investigated using stereoscopic particle image velocimetry ... -
Impulse Turbine Injector Design Improvement Using Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2015)This study utilizes two modern computational fluid dynamics (CFD) software packages (ansysآ®cfxآ® and ansysآ®fluentآ®) to analyze the basic geometric factors affecting the efficiency of a typical impulse turbine injector. ... -
Flow Characteristics of Gerotor Pumps With Novel Variable Clearance Designs
(The American Society of Mechanical Engineers (ASME), 2015)Although gerotor pumps are used in a wide range of industrial applications, higher work pressure causes shock or collision among pump components, which leads to large stress fluctuations and shortened pump life expectancy. ... -
Formulas for Calibration of Rheological Parameters of Bingham Fluid in Couette Rheometer
(The American Society of Mechanical Engineers (ASME), 2015)We propose simple formulas for calibration of rheological parameters of Bingham fluid using a coaxial cylinder rheometer, in which the inner cylinder rotates at a constant speed, and the outer cylinder is stationary. A ... -
Comparison of RANS and Detached Eddy Simulation Results to Wind Tunnel Data for the Surface Pressures Upon a Class 43 High Speed Train
(The American Society of Mechanical Engineers (ASME), 2015)Currently, there are three different methodologies for evaluating the aerodynamics of trains; fullscale measurements, physical modeling using windtunnel, and moving train rigs and numerical modeling using computational ...