Journal of Fluids Engineering: Recent submissions
Now showing items 2701-2720 of 9024
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A Review of the Dynamics of Cavitating Pumps
(The American Society of Mechanical Engineers (ASME), 2013)This paper presents a review of some of the recent developments in our understanding of the dynamics and instabilities caused by cavitation in pumps. Focus is placed on presently available data for the transfer functions ... -
Coherent Streamwise Vortex Structures in the Near Field of the Three Dimensional Wall Jet
(The American Society of Mechanical Engineers (ASME), 2013)A turbulent threedimensional wall jet with an exit Reynolds number of 250,000 was investigated using stereoscopic particle image velocimetry (PIV) in the nearfield region (x/D = 5). The proper orthogonal decomposition ... -
Investigation of Choking and Combustion Products' Swirling Frequency Effects on Gas Turbine Compressor Blade Fractures
(The American Society of Mechanical Engineers (ASME), 2013)Premature fracture failure of blades occurred in four of a refinery's gas turbine compressors. In order to evaluate the probability of combustion instability's effects on failure of the blades; i.e., choking and chamber ... -
Nonlinear Analysis of Rayleigh–Taylor Instability of Cylindrical Flow With Heat and Mass Transfer
(The American Society of Mechanical Engineers (ASME), 2013)We study the nonlinear Rayleigh–Taylor instability of the interface between two viscous fluids, when the phases are enclosed between two horizontal cylindrical surfaces coaxial with the interface, and when there is mass ... -
An Examination of Eddy Viscosity Models for Turbulent Free Shear Flows
(The American Society of Mechanical Engineers (ASME), 1971)The boundary layer equations based on an eddy viscosity concept are solved numerically in the Crocco coordinate plane. A multilevel linear difference scheme is employed. Four different viscosity ... -
Methodology for the Evaluation of Double Layered Microcapsule Formability Zone in Compound Nozzle Jetting Based on Growth Rate Ratio
(The American Society of Mechanical Engineers (ASME), 2013)Doublelayered microcapsules, which usually consist of a core (polymeric) matrix surrounded by a (polymeric) shell, have been used in many industrial and scientific applications, such as microencapsulation of drugs and ... -
Influence of Bubbles on the Turbulence Anisotropy
(The American Society of Mechanical Engineers (ASME), 2013)Direct numerical simulation (DNS) with interface tracking of turbulent bubbly flows is becoming a major tool in advancing our knowledge in the area of multiphase modeling research. A comprehensive analysis of the turbulent ... -
Power Law Fluid Flow Passing Two Square Cylinders in Tandem Arrangement
(The American Society of Mechanical Engineers (ASME), 2013)Twodimensional laminar flow of a powerlaw fluid passing two square cylinders in a tandem arrangement is numerically investigated in the ranges of 1< Re< 200 and 1 ≤ G ≤ 9. The fluid viscosity powerlaw ... -
An Investigation of the Lattice Boltzmann Method for Large Eddy Simulation of Complex Turbulent Separated Flow
(The American Society of Mechanical Engineers (ASME), 2013)Lattice Boltzmann method (LBM) is a relatively recent computational technique for fluid dynamics that derives its basis from a mesoscopic physics involving particle motion. While the approach has been studied for different ... -
Energy Dissipation Effect in the One Dimensional Limit of the Energy Equation in Turbulent Compressible Flow
(The American Society of Mechanical Engineers (ASME), 2013)The transportation of natural gas through high pressure transmission pipelines has been modeled by numerically solving the conservation equations for mass, momentum, and energy for onedimensional compressible viscous heat ... -
Numerical Study of the Damped Oscillation of Liquid Column in U Tube With Particle Method
(The American Society of Mechanical Engineers (ASME), 2013)The damped oscillation process of the liquid column in a Utube is simulated and studied using the moving particle semiimplicit (MPS) method. The oscillation process is well reproduced and the effect of liquid properties ... -
Analysis of the Airfoil Stall With a Modification of Viscous Inviscid Interaction Concept
(The American Society of Mechanical Engineers (ASME), 2013)A modification of the viscousinviscid interaction concept with the employment of coupled vortices around the airfoil wake is introduced for analyzing the airfoil stall. The analyzed flow includes the laminar boundary layers, ... -
Natural Convection Flow in a Strong Cross Magnetic Field With Radiation
(The American Society of Mechanical Engineers (ASME), 2013)The problem of magnetohydrodynamic natural convection boundary layer flow of an electrically conducting and optically dense gray viscous fluid along a heated vertical plate is analyzed in the presence of strong cross ... -
On the Dynamic Properties of Pump Liquid Seals
(The American Society of Mechanical Engineers (ASME), 2013)Rotordynamic instability due to fluid flow in seals is a well known phenomenon that can occur in pumps as well as in steam turbines and air compressors. While analysis methods using bulkflow equations are computationally ... -
Model of Flow in the Side Chambers of an Industrial Centrifugal Pump for Delivering Viscous Oil
(The American Society of Mechanical Engineers (ASME), 2013)A series of experiments has been conducted to identify the effects of both fluid viscosity and wearrings gap on the performance of a low specific speed industrial centrifugal pump of type 65Y60 for transporting viscous ... -
Modeling Die Swell of Second Order Fluids Using Smoothed Particle Hydrodynamics
(The American Society of Mechanical Engineers (ASME), 2013)This work presents the development of a weakly compressible smoothed particle hydrodynamics (WCSPH) model for simulating twodimensional transient viscoelastic free surface flow which has extensive applications in polymer ... -
X Ray Measurements in a Cavitating Centrifugal Pump During Fast Start Ups
(The American Society of Mechanical Engineers (ASME), 2013)The startup of rocket engine turbopumps is generally performed in a few seconds or even less. It implies that these pumps reach their nominal operating conditions after a few rotations only. During the startup, the flow ... -
Analysis of S Characteristics and Pressure Pulsations in a Pump Turbine With Misaligned Guide Vanes
(The American Society of Mechanical Engineers (ASME), 2013)Growing environmental concerns and the need for better power balancing and frequency control have increased attention in renewable energy sources such as the reversible pumpturbine which can provide both power generation ... -
Aeromechanical Control of High Speed Axial Compressor Stall and Engine Performance—Part II: Assessments of Methodology
(The American Society of Mechanical Engineers (ASME), 2013)A theoretical assessment was made explaining how aeromechanical feedback control can be implemented to stabilize rotating stall inception in highspeed axial compression systems. Ten aeromechanical control strategies were ... -
Ultrasonic Velocity of Sound and Void Fraction in a Bubbly Mixture
(The American Society of Mechanical Engineers (ASME), 1971)The velocity of sound at a frequency much greater than resonance in a bubbly air-water mixture has been measured for varying void fractions in a “pool” system. Only measurements of acoustic ...