Journal of Fluids Engineering: Recent submissions
Now showing items 2061-2080 of 9024
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An Approximate Computational Method for the Fluid Stiction Problem of Two Separating Parallel Plates With Cavitation
(The American Society of Mechanical Engineers (ASME), 2016)Stiction forces exerted by a fluid in a thin, quickly widening gap to its boundaries can become a strongly limiting factor of the performance of technical devices, like compressor valves or hydraulic on–off valves. In ... -
Guide Vane Closing Schemes for Pump Turbines Based on Transient Characteristics in S shaped Region
(The American Society of Mechanical Engineers (ASME), 2016)During the transitional processes of load rejection in a pumpedstorage station, the Sshaped characteristics of the pumpturbines can result in relatively large waterhammer and pulsating pressures. These pressures and the ... -
Noise Filtering for Wall Pressure Fluctuations in Measurements Around a Cylinder With Laminar and Turbulent Flow Separation
(The American Society of Mechanical Engineers (ASME), 2016)This paper proposes two different noise cancellation techniques for cleaning wallpressure fluctuations signals. These fluctuations are measured around a circular cylinder with laminar and turbulent flow separation. The ... -
Gas Enabled Resonance and Rectified Motion of a Piston in a Vibrated Housing Filled With a Viscous Liquid
(The American Society of Mechanical Engineers (ASME), 2016)We show how introducing a small amount of gas can completely change the motion of a solid object in a viscous liquid during vibration. We analyze an idealized system exhibiting this behavior: a piston in a liquidfilled ... -
A Mathematical Model to Analyze the Torque Caused by Fluid–Solid Interaction on a Hydraulic Valve
(The American Society of Mechanical Engineers (ASME), 2016)In this paper, a threedimensional (3D) computational fluid dynamics (CFD) methodology to improve the performance of hydraulic components will be shown, highlighting the importance that a study in the fluid mechanics field ... -
Cloud Cavitating Flow Over a Submerged Axisymmetric Projectile and Comparison Between Two Dimensional RANS and Three Dimensional Large Eddy Simulation Methods
(The American Society of Mechanical Engineers (ASME), 2016)For the cloud cavitation around slender axisymmetric projectiles, a twodimensional (2D) numerical method was based on the mixture approach with Singhal cavitation model and modified renormalizationgroup (RNG) k–خµ ... -
Influence of the Blade Trailing Edge Profile on the Performance and Unsteady Pressure Pulsations in a Low Specific Speed Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2016)The blade trailing edge profile is of crucial importance for the performance and pressure pulsations of centrifugal pumps. In the present study, numerical investigation is conducted to analyze the effect of the blade ... -
Two-Phase Air-Water Nozzle Flow
(The American Society of Mechanical Engineers (ASME), 1972)This paper describes an experimental investigation of two-phase, air-water nozzle flows including critical or choked flow. Five different nozzle geometries were used. The nozzles exhausted to ... -
Wake Topology of a Cylinder Undergoing Vortex Induced Vibrations With Elliptic Trajectories
(The American Society of Mechanical Engineers (ASME), 2016)Wake vortex shedding topology of a cylinder undergoing vortexinduced vibrations (VIV) is investigated experimentally. Vibration measurements and flow visualization are utilized to study the connection between the cylinder ... -
Wall Effects on the Brownian Movement, Thermophoresis, and Deposition of Nanoparticles in Liquids
(The American Society of Mechanical Engineers (ASME), 2016)It is well known that the hydrodynamic drag on particles is significantly enhanced close to a plane or curved boundary. This enhancement impedes the movement of the particles in both the parallel and the normal directions ... -
Factors Influencing Computational Predictability of Aerodynamic Losses in a Turbine Nozzle Guide Vane Flow
(The American Society of Mechanical Engineers (ASME), 2016)This paper deals with the computational predictability of aerodynamic losses in a turbine nozzle guide vane (NGV) flow. The paper shows that threedimensional (3D) computations of ReynoldsAveraged Navier Stokes (RANS) ... -
Numerical Modeling of Dielectric Barrier Discharge Plasma Actuation
(The American Society of Mechanical Engineers (ASME), 2016)A computational method has been developed to couple the electrohydrodynamic (EHD) body forces induced by dielectric barrier discharge (DBD) actuation with unsteady ReynoldsAveraged Navier–Stokes (URANS) model or large ... -
Experimental Investigation of Flow Over a Transversely Oscillating Square Cylinder at Intermediate Reynolds Number
(The American Society of Mechanical Engineers (ASME), 2016)This paper presents an experimental study of flow over a square cylinder oscillating in transverse direction. The Reynolds number selected for present study is 485. Limited study has also been made for two other Reynolds ... -
Effects of Junction Angle and Viscosity Ratio on Droplet Formation in Microfluidic Cross Junction
(The American Society of Mechanical Engineers (ASME), 2016)This study describes the dynamic behaviors of droplet formation in microfluidic crossjunction devices (MFCDs) based on a twodimensional numerical model using the volume of fluid (VOF) method. The effects of the junction ... -
Effects of Submergence on Low and Moderate Reynolds Number Free Surface Flow Around a Matrix of Cubes
(The American Society of Mechanical Engineers (ASME), 2016)The effect of reducing submergence depth at a low and moderate Reynolds number flow is investigated using large eddy simulation (LES) around a matrix of cubes. The submerged body is modeled using an immersed boundary method, ... -
Characteristics of Sheet Formed by Collision of Two Elliptical Jets at Short Impact Distance
(The American Society of Mechanical Engineers (ASME), 2016)The research on characteristics of impinging jet has a long history and focuses mainly on the circular jets, whereas the impingement of noncircular jets, such as elliptical jets, receives much less attention. This paper ... -
Investigation of the Performance of Turbulence Models With Respect to High Flow Curvature in Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2016)The goal of this research is to evaluate the performance of three turbulence models with respect to flow with high curvature in a centrifugal compressor stage designed for an aeroengine. The effectiveness of the curvature ... -
Scaling of Gas Diffusion Into Limited Partial Cavities
(The American Society of Mechanical Engineers (ASME), 2016)Bubbles populations in the wake of a partial cavity resulting from gas diffusion were measured to determine the noncondensable gas flux into the cavity. The diffusion rate is related to the dissolved gas content, the local ... -
Measurement of the Self Oscillating Vortex Rope Dynamics for Hydroacoustic Stability Analysis
(The American Society of Mechanical Engineers (ASME), 2016)Flow instabilities in hydraulic machines often feature oscillating cavitation volumes, which locally introduce compliance and mass flow gain effects. These unsteady characteristics play a crucial role in onedimensional ... -
Effect of Domain Size on Fluid–Particle Statistics in Homogeneous, Gravity Driven, Cluster Induced Turbulence
(The American Society of Mechanical Engineers (ASME), 2016)Scaling of volume fraction and velocity fluctuations with domain size is investigated for highmassloading suspensions of finitesize inertial particles subject to gravity. Results from highly resolved Euler–Lagrange ...