Journal of Fluids Engineering: Recent submissions
Now showing items 741-760 of 9024
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Multiphase Flow in a Liquid-Ring Vacuum Pump
(The American Society of Mechanical Engineers (ASME), 2020)A computational study based on unsteady Reynolds-averaged Navier–Stokes that resolves the gas–liquid interface was performed to examine the unsteady multiphase flow in a liquid-ring pump as a function of its inlet pressure ... -
An Assessment of Homogeneous Mixture Method Cavitation Models in Predicting Cavitation in Nozzle Flow
(The American Society of Mechanical Engineers (ASME), 2020)The homogeneous mixture method (HMM) is a popular class of models used in the computational prediction of cavitation. Several cavitation models have been developed for use with HMM to govern the development and destruction ... -
Assessment of Low-Re Turbulence Models and Analysis of Turbulent Flow in Porous Media Consisting of Square Cylinders With Different Diameter Ratios
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents a comparative study of volume average predictions between low-Reynolds-number (LRN) turbulence models: Abe–Kondoh–Nagano (AKN), Lam–Bremhorst, Yang–Shih, standard k–ϵ, and k–ω. A porous medium, which ... -
An Assessment of the Drag Models in the Case of a Shock Interacting With a Fixed Bed of Point Particles
(The American Society of Mechanical Engineers (ASME), 2020)In this work, three-dimensional Euler–Lagrange (EL) point-particle simulations of a shock wave interacting with a fixed bed of particles are carried out. The results from the particle-resolved (PR) simulations are used to ... -
The Application of the Integral Momentum Balance on the Pressure Drop of a Sudden Contraction
(The American Society of Mechanical Engineers (ASME), 2020)A new approach based on the momentum balance to calculate the pressure drop in turbulent flow through sharp-edged axisymmetric sudden contractions is presented. The momentum balance needs the velocity as well as the pressure ... -
The Effect of Shape on the Motion and Stability of Marangoni Surfers
(The American Society of Mechanical Engineers (ASME), 2020)The Marangoni propulsion of spheres and elliptical disks floating on the air–water interface were studied to understand the effect of particle shape on its motion and its stability at moderate Reynolds numbers. Self-propulsion ... -
Passive Reduction of Leakage by Transverse Jet
(The American Society of Mechanical Engineers (ASME), 2020)This article presents investigations of mass flow reduction in a gap above a fin by the air curtain technique. The proposed method uses slots in the fin to generate a bypass flow and to create a fluidic barrier in the gap ... -
Pressure and Flow Rate Fluctuations in Single- and Two-Blade Pumps
(The American Society of Mechanical Engineers (ASME), 2020)A comparative study on the highly unsteady flow field in single- and two-blade pumps is performed. Stationary pump characteristics, as well as pressure and flow rate fluctuations, are presented. Wall pressure fluctuations ... -
Transition and Turbulence Modeling for the Prediction of Cavitating Tip Vortices
(The American Society of Mechanical Engineers (ASME), 2020)This study evaluates the influence of transition and turbulence modeling on the prediction of wetted and cavitating tip vortices for an elliptical wing, while investigating the numerical errors. Transition modeling increases ... -
Numerical and Theoretical Study on the Varying Speed Impact of Wedge Bodies on a Water Surface
(The American Society of Mechanical Engineers (ASME), 2020)The varying speed impact of wedge bodies on a water surface is studied numerically and theoretically to provide a fast and accurate prediction of the pressure on the wedge surface and the motion of wedge bodies during the ... -
Progress on Understanding Rayleigh–Taylor Flow and Mixing Using Synergy Between Simulation, Modeling, and Experiment
(The American Society of Mechanical Engineers (ASME), 2020)Simultaneous advances in numerical methods and computing, theoretical techniques, and experimental diagnostics have all led independently to better understanding of Rayleigh–Taylor (RT) instability, turbulence, and mixing. ... -
Normal Stress Differences of Human Blood in Unidirectional Large-Amplitude Oscillatory Shear Flow
(The American Society of Mechanical Engineers (ASME), 2020)This work analyzes normal stress difference responses in blood tested in unidirectional large-amplitude oscillatory shear flow (udLAOS), a novel rheological test, designed for human blood. udLAOS mimics the pulsatile flow ... -
Special Issue: To Commemorate the Legacy of Malcolm J. Andrews—Scientist, Educator, and Leader
(The American Society of Mechanical Engineers (ASME), 2020)Malcolm received his B.A. and M.A. in Mathematics from Oxford University (1980, 1988) and his Ph.D. and DIC in Mechanical Engineering from Imperial College London (1986). He moved to the United States after receiving his ... -
Rayleigh-Taylor Instability: A Status Review of Experimental Designs and Measurement Diagnostics
(The American Society of Mechanical Engineers (ASME), 2020)The focus of experiments and the sophistication of diagnostics employed in Rayleigh-Taylor instability (RTI) induced mixing studies have evolved considerably over the past seven decades. The first theoretical analysis by ... -
Rayleigh–Taylor Instability With Varying Periods of Zero Acceleration
(The American Society of Mechanical Engineers (ASME), 2020)We present our findings from a numerical investigation of the acceleration-driven Rayleigh–Taylor Instability, modulated by varying periods without an applied acceleration field. It is well known from studies on shock-driven ... -
Pulsating Flow Past a Square Cylinder: Analysis of Force Coefficient Spectra and Vortex Structure Development
(The American Society of Mechanical Engineers (ASME), 2020)This study examines the changes in force coefficients and wake flow structures of a square cylinder subject to pulsating in-flow at different frequencies. The Reynolds number is 200, according to previous literature. Over ... -
Early Time Modifications to the Buoyancy-Drag Model for Richtmyer–Meshkov Mixing
(The American Society of Mechanical Engineers (ASME), 2020)The Buoyancy-Drag model is a simple model, based on ordinary differential equations, for estimating the growth in the width of a turbulent mixing zone at an interface between fluids of different densities due to Richtmyer–Meshkov ... -
Experiments and Simulations on the Turbulent, Rarefaction Wave Driven Rayleigh–Taylor Instability
(The American Society of Mechanical Engineers (ASME), 2020)Experiments were performed to observe the growth of the turbulent, Rayleigh–Taylor unstable mixing layer generated between air and SF6, with an Atwood number of A=(ρ2−ρ1)/(ρ2+ρ1)=0.64, where ρ1 and ρ2 are the densities of ... -
Scalar Power Spectra and Scalar Structure Function Evolution in the Richtmyer–Meshkov Instability Upon Reshock
(The American Society of Mechanical Engineers (ASME), 2020)The Richtmyer–Meshkov instability of a twice-shocked gas interface is studied using high-speed planar laser-induced fluorescence in the Wisconsin Shock Tube Laboratory's vertical shock tube. The initial condition is a shear ... -
Dependence of Enstrophy Transport and Mixed Mass on Dimensionality and Initial Conditions in the Richtmyer–Meshkov Instability Induced Flows1
(The American Society of Mechanical Engineers (ASME), 2020)This paper presents a comparative study of the enstrophy budget and mixed mass between two- and three-dimensional flows induced by Richtmyer–Meshkov instability (RMI). Specifically, the individual contributions to the ...