Journal of Fluids Engineering: Recent submissions
Now showing items 1181-1200 of 9024
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Density Ratio and Entrainment Effects on Asymptotic Rayleigh–Taylor Instability
(The American Society of Mechanical Engineers (ASME), 2018)A comprehensive numerical study was performed in order to examine the effect of density ratio on the mixing process inside the mixing zone formed by Rayleigh–Taylor instability (RTI). This effect exhibits itself in the ... -
High-Order Velocity Moments of Turbulent Boundary Layers in Seepage Affected Alluvial Channel
(The American Society of Mechanical Engineers (ASME), 2018)In this work, we have performed the flume study to analyze the high-order velocity moments of turbulent boundary layer with and without downward seepage. Sediment transport experiments were done in the laboratory for no ... -
Three-Objective Optimization of a Centrifugal Pump to Reduce Flow Recirculation and Cavitation
(The American Society of Mechanical Engineers (ASME), 2018)This work presents a three-objective design optimization of a centrifugal pump impeller to reduce flow recirculation and cavitation using three-dimensional (3D) Reynolds-averaged Navier–Stokes equations. A cavitation model ... -
Comparison of Various Pressure Based Boundary Conditions for Three-Dimensional Subsonic DSMC Simulation
(The American Society of Mechanical Engineers (ASME), 2018)Three-dimensional (3D) direct simulation Monte Carlo (DSMC) has been used to simulate flow in a straight microchannel using an in-house parallelized code. In the present work, a comparative study of seven boundary conditions ... -
Acoustic Response of Multiple Shallow Cavities and Prediction of Self-Excited Acoustic Oscillations
(The American Society of Mechanical Engineers (ASME), 2018)Self-sustaining oscillations of flow over ducted cavities and in corrugated pipes are a known source of tonal noise and excessive vibration in industrial applications. Corrugated pipes can be modeled as a series of ... -
Wall Pressure in Developing Turbulent Pipe Flows
(The American Society of Mechanical Engineers (ASME), 2018)Velocity fluctuations are widely used to identify the behavior of developing turbulent flows. The pressure on the other hand, which is strongly coupled with the gradient of the mean velocity and fluctuations, is less ... -
Numerical Investigation of the Pressure-Time Method Considering Pipe With Variable Cross Section
(The American Society of Mechanical Engineers (ASME), 2018)A common method to calculate the flow rate and consequently hydraulic efficiency in hydropower plants is the pressure-time method. In the present work, the pressure-time method is studied numerically by three-dimensional ... -
Influence of Impinging Wall Ramping Modification on the Flow Field of Open Cavity at M = 2.0
(The American Society of Mechanical Engineers (ASME), 2018)Studies were made to understand the flow features around an open cavity at Mach 2.0 corresponding to Re = 0.55 × 106 based on the cavity depth. Experiments were carried out using a blowdown type supersonic wind tunnel ... -
An Improved Assembling Algorithm in Boundary Elements With Galerkin Weighting Applied to Three-Dimensional Stokes Flows
(The American Society of Mechanical Engineers (ASME), 2018)In the boundary element method (BEM), the Galerkin weighting technique allows to obtain numerical solutions of a boundary integral equation (BIE), giving the Galerkin boundary element method (GBEM). In three-dimensional ... -
Influence of the Nozzle Shape on the Breakup Behavior of Continuous Ink Jets
(The American Society of Mechanical Engineers (ASME), 2018)In this work, the influence of nozzle shape on microfluidic ink jet breakup is investigated. First, an industrial ink used in continuous inkjet (CIJ) printing devices is selected. Ink rheological properties are measured ... -
Effect of Large Amplitude Waves and Film Inertia on Mass Separation at a Sharp Corner
(The American Society of Mechanical Engineers (ASME), 2018)The separation of a shear-driven thin liquid film from a sharp corner is studied in this paper. Partial or complete mass separation at a sharp corner is affected by two different mechanisms: liquid film inertia, which ... -
Lumped Parameter and Three-Dimensional Computational Fluid Dynamics Simulation of a Variable Displacement Vane Pump for Engine Lubrication
(The American Society of Mechanical Engineers (ASME), 2018) -
A Recipe for Optimum Mixing of Polymer Drag Reducers
(The American Society of Mechanical Engineers (ASME), 2018)Preparation of large-scale homogeneous solutions of drag reducing polymers requires an appropriate mixing procedure to ensure full disentanglement of the polymer chains without chain scission due to over-mixing. The latter ... -
Effect of Jet Oscillation on the Maximum Impingement Plate Skin Friction
(The American Society of Mechanical Engineers (ASME), 2018)The maximum impingement plate skin friction and flow field is measured for an acoustically forced planar impinging gas jet using oil film interferometry (OFI) and particle image velocimetry (PIV), respectively. The study ... -
Computational Fluid Dynamics Analysis of a Radial Turbine During Load Step Operation of an Automotive Turbocharger
(The American Society of Mechanical Engineers (ASME), 2018)A method for evaluating the transient performance of a turbocharger (TC) is so-called load step tests. In these tests, the load of the engine is increased at constant engine speed and the time measured from the start to ... -
Porous Materials Under Shock Loading as a Two-Phase Mixture: The Effect of the Interstitial Air
(The American Society of Mechanical Engineers (ASME), 2018)Deformation and mixing of solid particles in porous materials are typical consequences under shock compression and are usually considered as the major contributors to energy dissipation during shock compression while a ... -
Particle Image Velocimetry Investigation of the Coherent Structures in a Leading-Edge Slat Flow
(The American Society of Mechanical Engineers (ASME), 2018)Air traffic volume is expected to triple in the U.S. and Europe by 2025, and as a result, the aerospace industry is facing stricter noise regulations. Apart from the engines, one of the significant contributors of aircraft ... -
Experimental Studies on the Effect of Suction Chamber Angle on the Entrainment of Passive Fluid in a Steam Ejector
(The American Society of Mechanical Engineers (ASME), 2018)In this experimental study, the impact of suction chamber angle (SCA) on the entrainment ratio of a steam ejector refrigeration system (ERS) of 700 W was investigated. The basic dimensions of the ejector were derived from ... -
Investigation of the Effect of Geometric Parameters on EWOD Actuation in Rectangular Microchannels
(The American Society of Mechanical Engineers (ASME), 2018)Efficient actuation of liquid slugs in microfluidic circuits is a matter of interest in droplet-based microfluidic (DMF) applications. In this paper, the electrowetting on dielectric (EWOD) actuation of a liquid slug fully ... -
Parametric Study on Fluid Dynamics of Pilot-Control Angle Globe Valve
(The American Society of Mechanical Engineers (ASME), 2018)Globe valve is widely used in numerous industries, and its driving energy consumption accounts for high percentages of the whole piping system. In order to figure out novel globe valves with low energy consumption, the ...