Journal of Fluids Engineering: Recent submissions
Now showing items 2421-2440 of 9024
-
Large Eddy Simulations of a Stratified Shear Layer
(The American Society of Mechanical Engineers (ASME), 2014)The performance of the large eddy simulation (LES) approach in predicting the evolution of a shear layer in the presence of stratification is evaluated. The LES uses a dynamic procedure to compute subgrid model coefficients ... -
Constant Flux States in Anisotropic Turbulence
(The American Society of Mechanical Engineers (ASME), 2014)An elementary closure theory is used to compute the scaling of anisotropic contributions to the correlation function in homogeneous turbulence. These contributions prove to decay with wavenumber more rapidly than the energy ... -
Three Dimensional Turbulent Vortex Shedding From a Surface Mounted Square Cylinder: Predictions With Large Eddy Simulations and URANS
(The American Society of Mechanical Engineers (ASME), 2014)The paper reports on the prediction of the turbulent flow field around a threedimensional, surface mounted, squaresectioned cylinder at Reynolds numbers in the range 104–105. The effects of turbulence are accounted for ... -
Large Eddy Simulations of Thermal Boundary Layer Spatial Development in a Turbulent Channel Flow
(The American Society of Mechanical Engineers (ASME), 2014)This article presents Large Eddy Simulations of thermal boundary layer spatial development in a lowMach number turbulent channel flow. A coupling between isothermal biperiodic channel and anisothermal open channel is done ... -
Time Domain Wave Packet Method and Suppression of Instability Waves in Aeroacoustic Computations
(The American Society of Mechanical Engineers (ASME), 2014)A new time domain methodology for Computational Aeroacoustics (CAA) is proposed. The time domain wave packet (TDWP) method employs a temporally compact broadband pulse for acoustic sources. As the radiation and transmission ... -
Multiscale Nested Simulations of Rayleigh–Taylor Instabilities in Ionospheric Flows
(The American Society of Mechanical Engineers (ASME), 2014)Nested numerical simulations of ionospheric plasma density structures associated with nonlinear evolution of the Rayleigh–Taylor (RT) instability in equatorial spread F (ESF) are presented. The numerical implementation ... -
Higher Order Linear Time Unconditionally Stable Alternating Direction Implicit Methods for Nonlinear Convection Diffusion Partial Differential Equation Systems
(The American Society of Mechanical Engineers (ASME), 2014)We introduce a class of alternating direction implicit (ADI) methods, based on approximate factorizations of backward differentiation formulas (BDFs) of order p≥2, for the numerical solution of twodimensional, timedependent, ... -
Special Section Honoring Professor M. Yousuff Hussaini 70th Birthday
(The American Society of Mechanical Engineers (ASME), 2014)Professor Hussaini was born in India and received his B.S. and M.S. degrees in mathematics and physics from the University of Madras, India. He earned his Ph.D. in Mechanical Engineering from the University of California ... -
Temperature and Entropy in Ideal Magnetohydrodynamic Turbulence
(The American Society of Mechanical Engineers (ASME), 2014)Fourier analysis of incompressible, homogeneous magnetohydrodynamic (MHD) turbulence produces a model dynamical system on which to perform numerical experiments. Statistical methods are used to understand the results of ... -
Discussion: “Slip Flow in Microchannels of Non Circular Cross Sectionsâ€
(The American Society of Mechanical Engineers (ASME), 2014) -
Effects of the Radial Gap Between Impeller Tips and Volute Tongue Influencing the Performance and Pressure Pulsations of Pump as Turbine
(The American Society of Mechanical Engineers (ASME), 2014)The radial gap between the impeller tips and volute tongue is an important factor influencing the overall performance and unsteady pressure fields of the pump as turbine (PAT). In this paper, a numerical investigation of ... -
Direct Numerical Simulation and Large Eddy Simulation of Laminar Separation Bubbles at Moderate Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2014)Flows over airfoils and blades in rotating machinery for unmanned and microaerial vehicles, wind turbines, and propellers consist of different flow regimes. A laminar boundary layer near the leading edge is often followed ... -
Partially Averaged Navier–Stokes Simulations of High Speed Mixing Environment
(The American Society of Mechanical Engineers (ASME), 2014)Accurate simulation of the fuelair mixing environment is crucial for highfidelity scramjet calculations. We compute the velocity fields of jet into supersonic freestream flow and cavity flow typical of scramjet flameholding ... -
Study of Erosive Cavitation Detection in Pump Mode of Pump–Storage Hydropower Plant Prototype
(The American Society of Mechanical Engineers (ASME), 2014)An experimental investigation has been made to detect cavitation in a pump–storage hydropower plant prototype suffering from leading edge cavitation in pump mode. Vibrations and acoustic emission on the housing of the ... -
Study of Characteristics of Cloud Cavity Around Axisymmetric Projectile by Large Eddy Simulation
(The American Society of Mechanical Engineers (ASME), 2014)Cavitation generally occurs where the pressure is lower than the saturated vapor pressure. Based on large eddy simulation (LES) methodology, an approach is developed to simulate dynamic behaviors of cavitation, using kخ¼ ... -
Two Phase Upward Flow in a Slightly Deviated Pipe
(The American Society of Mechanical Engineers (ASME), 2014)This study was undertaken to look at the effect of a slight inclination of pipe on upward flow characteristics especially at 10 deg from vertical position. Airsilicone oil flows in a 67 mm diameter pipe have been investigated ... -
The Application of Wall Similarity Techniques to Determine Wall Shear Velocity in Smooth and Rough Wall Turbulent Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2014)Smooth and rough wall turbulent boundary layer profiles are frequently scaled using the wall shear velocity u*, thus it is important that u* is accurately known. This paper reviews and assesses several wall similarity ... -
On the Axisymmetric Turbulent Boundary Layer Growth Along Long Thin Circular Cylinders
(The American Society of Mechanical Engineers (ASME), 2014)Even after several decades of experimental and numerical testing, our presentday knowledge of the axisymmetric turbulent boundary layer (TBL) along long thin circular cylinders still lacks a clear picture of many fundamental ... -
Large Eddy Simulation of a Free Circular Jet
(The American Society of Mechanical Engineers (ASME), 2014)A large eddy simulation (LES) of an incompressible spatially developing circular jet at a Reynolds number of 10,000 is performed. The shearimproved Smagorinsky model (Lأ©vأھque et al., 2007, “A ShearImproved Smagorinsky ... -
An Experimental Investigation of Turbulent Water Flow in Concentric Annulus Using Particle Image Velocimetry Technique
(The American Society of Mechanical Engineers (ASME), 2014)Fully developed turbulent flow of water through a horizontal flow loop with concentric annular geometry was investigated using high resolution particle image velocimetry (PIV). Reynolds number range varied from 17,700 to ...