Journal of Fluids Engineering: Recent submissions
Now showing items 2321-2340 of 9024
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Modeling and Experimental Characterization of Pressure Drop in Gravity Driven Microfluidic Systems
(The American Society of Mechanical Engineers (ASME), 2015)Passive pumping using gravitydriven flow is a fascinating approach for microfluidic systems. When designing a passive pumping system, generated flow rates should be known precisely. While reported models used to estimate ... -
Pressure Gradient Effects on Smooth and Rough Surface Turbulent Boundary Layers—Part II: Adverse Pressure Gradient
(The American Society of Mechanical Engineers (ASME), 2015)An experimental investigation has been conducted to identify the effects of pressure gradient and surface roughness on turbulent boundary layers. In Part II, smoothand roughsurface turbulent boundary layers with and without ... -
Observation of the Development of Secondary Features in a Richtmyer–Meshkov Instability Driven Flow
(The American Society of Mechanical Engineers (ASME), 2015)Richtmyer–Meshkov instability (RMI) has long been the subject of interest for analytical, numerical, and experimental studies. In comparing results of experiment with numerics, it is important to understand the limitations ... -
Some Exact Solutions to Equations of Motion of an Incompressible Second Grade Fluid
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, we derive some exact solutions of the equations governing the steady plane motions of an incompressible second grade fluid. For this purpose, the vorticity and stream functions both are expressed in terms ... -
Stability Analysis of a Droplet Pinned in Channel Under Gravity
(The American Society of Mechanical Engineers (ASME), 2015)The stability of a twodimensional, incompressible droplet, with two cylindricalcaps that is held in a channel under gravity, is investigated through the development of an analytical model based on the Young–Laplace ... -
Particle Motion in a Macroscale, Multiwavelength Acoustic Field
(The American Society of Mechanical Engineers (ASME), 2015)Particle motion due to ultrasonic acoustic radiation in a macroscale, multiwavelength acoustic chamber is investigated and compared with available theories. Primary acoustic radiation force theory has been extensively ... -
Radial Deformation Frequency Effect on the Three Dimensional Flow in the Cylinder Wake
(The American Society of Mechanical Engineers (ASME), 2015)In the current paper, the threedimensional air flow evolution around a circular cylinder is studied. The main aim is to control the flow field upstream and downstream of a circular cylinder by means of radial deformation. ... -
Flow Induced Energy Losses in the Exhaust Port of an Internal Combustion Engine
(The American Society of Mechanical Engineers (ASME), 2015)A numerical study of the flow in the exhaust port geometry of a Scania heavyduty diesel engine is performed using the large eddy simulation (LES) and an unsteady ReynoldsAveraged Navier–Stokes (URANS) simulation approach. ... -
Mixing by Time Dependent Orbits in Spatiotemporal Chaotic Advection
(The American Society of Mechanical Engineers (ASME), 2015)The simultaneous effects of flow pulsation and geometrical perturbation on laminar mixing in curved ducts have been numerically studied by three different metrics: analysis of the secondary flow patterns, Lyapunov exponents ... -
RANS Modeling of Accelerating Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2015)A numerical investigation of accelerated boundary layers (BL) has been performed using linear and nonlinear eddy viscosity models (EVM). The acceleration parameters (KS) investigated the range between 1.5 أ— 10−6 and ... -
Pressure Gradient Effects on Smooth and Rough Surface Turbulent Boundary Layers—Part I: Favorable Pressure Gradient
(The American Society of Mechanical Engineers (ASME), 2015)The effects of the pressure gradient and surface roughness on turbulent boundary layers have been experimentally investigated. In Part I, smoothand roughsurface turbulent boundary layers with and without favorable pressure ... -
Numerical and Experimental Analysis of Flow Phenomena in a Centrifugal Pump Operating Under Low Flow Rates
(The American Society of Mechanical Engineers (ASME), 2015)The characteristics of flow instabilities as well as the cavitation phenomenon in a centrifugal pump operating at low flow rates were studied by experimental and numerical means, respectively. Specially, a threedimensional ... -
Time Accurate Analysis of the Viscous Flow Around Puller Podded Drive Using Sliding Mesh Method
(The American Society of Mechanical Engineers (ASME), 2015)In this paper a computational method is presented for predicting the unsteady hydrodynamic forces acting on podded drive components. These numerical simulations are performed with the aim of accurately studying the interaction ... -
Detection of Draft Tube Surge and Erosive Blade Cavitation in a Full Scale Francis Turbine
(The American Society of Mechanical Engineers (ASME), 2015)A fullscale Francis turbine has been experimentally investigated over its full range of operation to detect draft tube swirling flows and cavitation. The unit is of interest due to the presence of severe pressure fluctuations ... -
A Comparison Between the Separated Flow Structures Near the Wake of a Bare and a Foam Covered Circular Cylinder
(The American Society of Mechanical Engineers (ASME), 2014)The flow structures behind bare and aluminum foamcovered single circular cylinders were investigated using particle image velocimetry (PIV). The experiments are conducted for a range of Reynolds numbers from 2000 to 8000, ... -
Experimental Investigation of Horizontal Gas–Liquid Stratified and Annular Flow Using Wire Mesh Sensor
(The American Society of Mechanical Engineers (ASME), 2014)Stratified and annular gas–liquid flow patterns are commonly encountered in many industrial applications, such as oil and gas transportation pipelines, heat exchangers, and process equipment. The measurement and visualization ... -
Richardson Extrapolation Based Discretization Uncertainty Estimation for Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2014)This study investigates the accuracy of various Richardson extrapolationbased discretization error and uncertainty estimators for problems in computational fluid dynamics (CFD). Richardson extrapolation uses two solutions ... -
Study on Kelvin–Helmholtz Instability With Heat and Mass Transfer
(The American Society of Mechanical Engineers (ASME), 2014)The effect of heat and mass transfer on the Kelvin–Helmholtz instability between liquid and vapor phases of a fluid has been studied using three different theories: a purely irrotational theory based on the dissipation ... -
Characterization and Modeling of Micro Swimmers With Helical Tails and Cylindrical Heads Inside Circular Channels
(The American Society of Mechanical Engineers (ASME), 2014)Micro swimming robots offer many advantages in biomedical applications, such as delivering potent drugs to specific locations in targeted tissues and organs with limited side effects, conducting surgical operations with ... -
Transient Pressure Measurements on a High Head Model Francis Turbine During Emergency Shutdown, Total Load Rejection, and Runaway
(The American Society of Mechanical Engineers (ASME), 2014)The penetration of intermittent wind and solar power to the grid network above manageable limits disrupts electrical power grids. Consequently, hydraulic turbines synchronized to the grid experience total load rejection ...