Journal of Fluids Engineering: Recent submissions
Now showing items 601-620 of 9024
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Investigation of Tire Rotating Modeling Techniques Using Computational Fluid Dynamics1
(The American Society of Mechanical Engineers (ASME), 2021)Fuel efficiency becomes very important for new vehicles. Therefore, improving the aerodynamics of tires has started to receive increasing interest. While the experimental approaches are time-consuming and costly, numerical ... -
An Experimental Investigation of Flow Phenomena in a Multistage Micro-Tesla Valve
(The American Society of Mechanical Engineers (ASME), 2021)The Tesla–diode valve, with no moving parts, allows restricted flow in one direction. It has many potential applications in different industrial situations. Despite the application of the valve and the importance of the ... -
Analysis of Motion Characteristics of a Controllable Ventilated Supercavitating Vehicle Under Accelerations
(The American Society of Mechanical Engineers (ASME), 2021)The development of a maneuverable underwater high-speed vehicle is worthy of attention and study using supercavitation drag reduction theory and technology. The supercavity shape determines the hydrodynamics of the vehicle, ... -
Effect of the Speed Factor on the Amplitude of the Blade Passing Frequency in the Vaneless Space of a Pump Turbine in Turbine Mode
(The American Society of Mechanical Engineers (ASME), 2021)An exponential expression describing the relationship between the amplitude of the blade passing frequency in the vaneless space of a pump turbine operating in the turbine mode and the speed factor is proposed based on ... -
Improve of Unsteady Pressure Pulsation Based on Jet–Wake Suppression for a Low Specific Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2021)In this study, three impellers with different blade pressure side (PS) profiles are designed and the influence on the hydraulic and dynamic performance of a low specific speed centrifugal pump is investigated by numerical ... -
Effects of Lean Mode of Blade Trailing Edge on Pressure Fluctuation Characteristics of a Vertical Centrifugal Pump With Vaned Diffuser
(The American Society of Mechanical Engineers (ASME), 2021)A vertical centrifugal pump with a vaned diffuser is very attractive in the field of long-distance water supply. Excessive pressure fluctuations in the vaneless region due to rotor–stator interaction (RSI) need careful ... -
Estimation of Vortex-Induced Vibration Based on Observed Wakes Using Computational Fluid Dynamics-Trained Deep Neural Network
(The American Society of Mechanical Engineers (ASME), 2021)The vibration of a circular cylinder due to fluid forces is of interest in various engineering fields. In this study, we investigate an approach to estimate the fluid forces acting on a circular cylinder in a flow field ... -
Explicit Algebraic Reynolds-Stress Modeling of Pressure-Induced Separating Flows in the Presence of Sidewalls
(The American Society of Mechanical Engineers (ASME), 2021)Reynolds-averaged Navier–Stokes (RANS) approach is used to simulate the steady-state of a family of pressure-induced turbulent separation bubbles in the presence of sidewalls. Different turbulence models are employed with ... -
Air-Water Flow Properties in Hydraulic Jumps With Fully and Partially Developed Inflow Conditions
(The American Society of Mechanical Engineers (ASME), 2021)Novel air–water flow measurements were conducted in fully aerated hydraulic jumps with partially and fully developed supercritical inflow conditions. Irrespective of the inflow conditions, the hydraulic jumps resembled ... -
On the Motion of Single and Twin Oblique Particle Clouds in Stagnant Water
(The American Society of Mechanical Engineers (ASME), 2021)The evolution of single and twin oblique particle clouds in stagnant water was investigated using a series of laboratory experiments and the effects of controlling parameters such as sand mass and nozzle spacing were ... -
Approximate Solution of the Varying Speed Impact of Three-Dimensional Bodies on the Water Surface
(The American Society of Mechanical Engineers (ASME), 2021)This paper proposes an approximate solution for the varying speed impact of three-dimensional (3D) bodies on the water surface, with the assumptions that the fluid is considered to be incompressible, inviscid, weightless, ... -
Exact Solution of the Startup Electroosmotic Flow of Generalized Maxwell Fluids in Triangular Microducts
(The American Society of Mechanical Engineers (ASME), 2021)The unsteady electroosmotic flow of generalized Maxwell fluids in triangular microducts is investigated. The governing equation is formulated with Caputo–Fabrizio time-fractional derivatives whose orders are distributed ... -
Flow of Power-Law Fluids Past a Rotating Cylinder at High Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2021)In this study, a rotating cylinder is placed in a stream of shear-thinning fluids, flowing with a uniform velocity. Detailed investigations are performed for the following range of conditions: Reynolds number 100≤Re≤500, ... -
Generation of Twin Vortex Rope in the Draft-Tube Elbow of a Francis Turbine During Deep Part-Load Operation
(The American Society of Mechanical Engineers (ASME), 2021)This paper focuses on the generation of twin vortex rope in the draft-tube elbow of a Francis turbine at deep part-load operation through analyzing the results of model tests along with numerical simulations. Model tests, ... -
Hydrodynamic Optimization of Coaxial Ground Heat Exchanger
(The American Society of Mechanical Engineers (ASME), 2021)A simple mathematical model of fluid flow is applied to determine the cross-sectional shape of a coaxial ground heat exchanger (CGHE) for which the friction pressure drop is minimal. Both laminar and turbulent flows of a ... -
Near-Wall Velocimetry in the Impingement-Zones of a Microdroplet and a Round Jet Stream
(The American Society of Mechanical Engineers (ASME), 2021)Near-wall fluid velocimetry in the impingement zone of a microdroplet stream on a flat surface is reported utilizing microparticle tracking velocimetry (μPTV). The results are then compared with the near-wall fluid velocimetry ... -
A New Approach to the Modeling of Magnetorheological Dampers and Application to Resonance Control
(The American Society of Mechanical Engineers (ASME), 2021)A predetermined flow pattern in a magnetorheological damper providing continuously variable resistance to flow is required for efficient damping of a given load. The required predetermined flow pattern rests on the a priori ... -
Smoothed Particle Hydrodynamics Simulations of Turbulent Flow in Curved Pipes With Different Geometries: A Comparison With Experiments
(The American Society of Mechanical Engineers (ASME), 2021)The swirling secondary flow in curved pipes is studied in three-space dimensions using a weakly compressible smoothed particle hydrodynamics (WCSPH) formulation coupled to new nonreflecting outflow boundary conditions. A ... -
The Polytropic Approach in Modeling Compressible Flows Through Constant Cross-Section Pipes
(The American Society of Mechanical Engineers (ASME), 2021)A compressible flow with wall friction has been predicted in a constant cross section duct by means of a barotropic modeling approach, and new analytical formulas have been proposed that also allow any possible heat transfer ... -
Resolving Pitching Airfoil Transonic Aerodynamics by Computational Fluid Dynamics Data Modeling1
(The American Society of Mechanical Engineers (ASME), 2021)A detailed numerical study of harmonically pitching airfoils of NACA00 series is presented here. Based on the analysis of the computational fluid dynamics (CFD) results, a hypothesis is made that a simple data model can ...