Journal of Fluids Engineering: Recent submissions
Now showing items 2601-2620 of 9024
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Optimum Parameter Design of Microbubble Drag Reduction in a Turbulent Flow by the Taguchi Method Combined With Artificial Neural Networks
(The American Society of Mechanical Engineers (ASME), 2013)This study attempts to optimize parameters for the microbubble drag reduction in a turbulent flow based on experimental measurements. Five parameters were investigated: three are control factors (the area of air injection, ... -
Drag Reduction of a Bluff Body by Grooves Laid Out by Design of Experiment
(The American Society of Mechanical Engineers (ASME), 2013)In this study, we used the Taguchi method to derive the optimal design parameters for the grooves formed on the upper surface of a circular cylinder. Using the derived values of the optimal design parameters, we created ... -
Parametric Analysis of Turbulent Wall Jet in Still Air Over a Transitional Rough, With Asymptotes of Fully Rough and Fully Smooth Wall Jets
(The American Society of Mechanical Engineers (ASME), 2013)The novel scalings for streamwise variations of the flow in a turbulent wall jet over a fully smooth, transitional, and fully rough surfaces have been analyzed. The universal scaling for arbitrary wall roughness is considered ... -
Mitigation of Vortex Induced Vibrations of a Pivoted Circular Cylinder Using an Adaptive Pendulum Tuned Mass Damper
(The American Society of Mechanical Engineers (ASME), 2013)A novel adaptive pendulum tunedmass damper (TMD) was integrated with a two degreeoffreedom (DOF) cylindrical structure in order to control vortexinduced vibrations of the structure. The natural frequency of the TMD was ... -
A Numerical Analysis of Hydrogen Underexpanded Jets Under Real Gas Assumption
(The American Society of Mechanical Engineers (ASME), 2013)This work examines the fluid dynamic structure of underexpanded gas jets by using a highperformance computing (HPC) methodology in order to untangle the question of whether it is necessary to include the real gas assumption ... -
Effect of Axis Ratio on Fluid Flow Around an Elliptic Cylinder—A Numerical Study
(The American Society of Mechanical Engineers (ASME), 2013)The bluff body simulations over canonical forms like circular and square cylinders are very well studied and the correlations for bulk parameters like mean drag coefficient and Strouhal numbers for the same are reported ... -
Development of Accelerating Pipe Flow Starting From Rest
(The American Society of Mechanical Engineers (ASME), 2013)A uniformly accelerated laminar flow in a pipe, initially at rest, is analyzed. Onedimensional unsteady flow equations for startup flow were derived from the Navier–Stokes and continuity equations. The dynamical boundary ... -
Experimental and Numerical Studies for a High Head Francis Turbine at Several Operating Points
(The American Society of Mechanical Engineers (ASME), 2013)Experimental and numerical studies on a high head model Francis turbine were carried out over the entire range of turbine operation. A complete Hill diagram was constructed and pressuretime measurements were performed at ... -
Numerical Method for Determining Stress Intensity Factors of an Interior Crack in a Finite Plate
(The American Society of Mechanical Engineers (ASME), 1971)A boundary collocation method for estimating the stress intensity factors for a through-thickness interior crack in a plate of arbitrary geometry and arbitrary in-plane loading on the plate ... -
Experimental Investigation of Vortex Flow in a Two Chamber Solar Thermochemical Reactor
(The American Society of Mechanical Engineers (ASME), 2013)Recent advances in the field of largescale solar thermochemical processing have given rise to substantial research efforts and demonstration projects. Many applications of hightemperature solarthermal technology employ an ... -
Numerical Analysis of Vortex Dynamics in a Double Expansion
(The American Society of Mechanical Engineers (ASME), 2013)The turbulent flow through a 3D diffuser featuring a double expansion is investigated using computational fluid dynamics. Time dependent simulations are reported using the stress omega Reynolds stress model available in ... -
A Computational Study of Turbulent Airflow and Tracer Gas Diffusion in a Generic Aircraft Cabin Model
(The American Society of Mechanical Engineers (ASME), 2013)In order to study the capability of computational methods in investigating the mechanisms associated with disease and contaminants transmission in aircraft cabins, the computational fluid dynamics (CFD) models are used for ... -
Numerical and Experimental Study of Axial Force and Hydraulic Performance in a Deep Well Centrifugal Pump With Different Impeller Rear Shroud Radius
(The American Society of Mechanical Engineers (ASME), 2013)A multistage deepwell centrifugal pump (DCP) with different impeller rear shroud radius have been investigated both numerically and experimentally under multiconditons, which aims at studying the influence of impeller rear ... -
Dynamic Expansion of an Open-Ended Tube
(The American Society of Mechanical Engineers (ASME), 1971)The deformation mode of a thin tube subjected to an arbitrary time varying pressure pulse is in two phases: (i) during positive radial acceleration a zone of zero axial strain sweeps outwards ... -
Calibrated Coarse Grid Finite Volume Method for the Fast Calculation of the Underhood Flow of a Vehicle
(The American Society of Mechanical Engineers (ASME), 2013)In this paper we introduce a novel method for calculating 3D flow through the underhood compartement of a vehicle. The method is based on the system of Euler equations, which are numerically solved by a finite volume ... -
Experimental Study on a Medium Consistency Pump
(The American Society of Mechanical Engineers (ASME), 2013)An experimental testing rig is built to study the performance of a centrifugal pump used in medium consistency technology (MC technology). Pump performances are tested in different pulp concentration, degas pressure ... -
A CFD Study of Pressure Fluctuations to Determine Fluidization Regimes in Gas–Solid Beds
(The American Society of Mechanical Engineers (ASME), 2013)Reliable computational methods can provide valuable insight into gas–solid flow processes and can be used as a design tool. Of particular interest in this study is the hydrodynamics of a binary mixture of sand–biomass ... -
Wind Tunnel Experiment of Bluff Body Aerodynamic Models Using a New Type of Magnetic Suspension and Balance System
(The American Society of Mechanical Engineers (ASME), 2013)We have measured drag coefficients of a sphere and a circular cylindrical aerodynamic model using a five axes and a six axes control magnetic suspension and balance system (MSBS) developed by us. This MSBS has the ... -
Symmetrical Ball Check Valve Based Rotation Sensitive Pump
(The American Society of Mechanical Engineers (ASME), 2013)In this work an electromagnetically actuated membrane pump, which allows flow reversion with a simple rotation of its valve system, is presented as a proof of concept. The valve system combines two symmetrical ball checkvalves ... -
The Effect of Compressibility on Turbulent Shear Flow: Direct Numerical Simulation Study
(The American Society of Mechanical Engineers (ASME), 2013)The study of the phenomenon of compressibility for modeling to second order has been made by several authors, and they concluded that models of the pressurestrain are not able to predict the structural evolution of the ...