Journal of Fluids Engineering: Recent submissions
Now showing items 1321-1340 of 9024
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Measured Static and Rotordynamic Characteristics of a Smooth-Stator/Grooved-Rotor Liquid Annular Seal
(The American Society of Mechanical Engineers (ASME), 2018)Electric submersible pumps (ESPs) utilize grooved-rotor/smooth-stator (SS/GR) seals to reduce leakage and break up contaminants within the pumped fluid. Additionally, due to their decreased surface area (when compared to ... -
Mean Velocity, Reynolds Shear Stress, and Fluctuations of Velocity and Pressure Due to Log Laws in a Turbulent Boundary Layer and Origin Offset by Prandtl Transposition Theorem
(The American Society of Mechanical Engineers (ASME), 2018)The maxima of Reynolds shear stress and turbulent burst mean period time are crucial points in the intermediate region (termed as mesolayer) for large Reynolds numbers. The three layers (inner, meso, and outer) in a turbulent ... -
Modeling the Flow of Non-Newtonian Fluids Through Sharp Orifices
(The American Society of Mechanical Engineers (ASME), 2018)This paper proposes a novel orifice flow model for non-Newtonian fluids. The orifice model is developed for sharp orifices with small apertures (orifice to pipe diameter ratio: 0.04 ≤ β ≤ 0.16) for which predictive models ... -
A Relatively Simple Integral Method for Turbulent Flow Over Rough Surfaces
(The American Society of Mechanical Engineers (ASME), 2017)The integral form of the equation for x momentum is solved for the skin friction coefficient, in external thin boundary layer flow, on surfaces whose technical roughness elements' size is given. This is done by using a ... -
Numerical Simulations and Analysis of a Low Consumption Hybrid Air Extractor
(The American Society of Mechanical Engineers (ASME), 2017)Hybrid low pressure air extractors are an economic way to enhance indoor air quality. The evaluation of their energetic performances needs the analysis of flow parameters that is typically done with wind tunnel data and ... -
An Experimental and Numerical Analysis of Water Hammer Phenomenon in Slurries
(The American Society of Mechanical Engineers (ASME), 2017)Fine solid materials can be transported with the use of water as a carrier liquid. From the practical point of view, the economy of designing and maintenance is usually the most important factor. That way of transport has ... -
An Assessment of the Two-Layer Quasi-Laminar Theory of Relaminarization Through Recent High-Re Accelerated Turbulent Boundary Layer Experiments
(The American Society of Mechanical Engineers (ASME), 2017)The phenomenon of relaminarization is observed in many flow situations, including that of an initially turbulent boundary layer (TBL) subjected to strong favorable pressure gradients (FPG). As several experiments on ... -
Starting Flow in a Channel With Two Immiscible Fluids
(The American Society of Mechanical Engineers (ASME), 2017)The starting flow due to a sudden pressure gradient in a channel containing two layers of different fluids is studied for the first time. The necessary eigenvalues and eigenfunctions, including orthogonality, for the ... -
Development of the Dual Vertical Axis Wind Turbine Using Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2017)Small vertical axis wind turbines (VAWTs) are good candidates to extract energy from wind in urban areas because they are easy to install, service, and do not generate much noise; however, the efficiency of small turbines ... -
Flow Unsteadiness and Stability Characteristics of Low-Re Flow Past an Inclined Triangular Cylinder
(The American Society of Mechanical Engineers (ASME), 2017)The present study investigates the two-dimensional flow past an inclined triangular cylinder at Re = 100. Numerical simulation is performed to explore the effect of cylinder inclination on the aerodynamic quantities, ... -
Analysis and Prediction of Fluid Flow Behavior in Progressing Cavity Pumps
(The American Society of Mechanical Engineers (ASME), 2017)A progressing cavity pump (PCP) is a positive displacement pump with an eccentric screw movement, which is used as an artificial lift method in oil wells. Downhole PCP systems provide an efficient lifting method for heavy ... -
Modeling Coupled Conduction–Convection Ice Formation on Horizontal Axially Finned and Unfinned Tubes
(The American Society of Mechanical Engineers (ASME), 2017)The freezing of water around immersed unfinned and finned horizontal tubes is simulated numerically. The impact of natural convection as well as the water density inversion with temperature is considered. The equations ... -
Benchmarking of Computational Fluid Methodologies in Resolving Shear-Driven Flow Fields
(The American Society of Mechanical Engineers (ASME), 2017)Despite recent interests in complex fluid–structure interaction (FSI) problems, little work has been conducted to establish baseline multidisciplinary FSI modeling capabilities for research and commercial activities across ... -
Numerical Investigation of Back Vane Design and Its Impact on Pump Performance
(The American Society of Mechanical Engineers (ASME), 2017)Adding back vanes to the rear shroud of centrifugal pumps is sometimes practiced in order to alleviate large axial forces. Effective design and flow characteristics of back vanes remain obscure due to lack of knowledge ... -
Characteristics of Turbulent Flows Over Forward Facing Steps in Adverse Pressure Gradients Based on Two-Point Analyses
(The American Society of Mechanical Engineers (ASME), 2017)This study reports the results of turbulent flows forward facing steps (FFS) in pressure gradients using a particle image velocimetry (PIV) technique to obtain data up to 68 step heights downstream. The contours of two-point ... -
Effect of Corner Radius in Stabilizing the Low-Re Flow Past a Cylinder
(The American Society of Mechanical Engineers (ASME), 2017)We perform global linear stability analysis on low-Re flow past an isolated cylinder with rounded corners. The objective of the present work is to investigate the effect of cylinder geometry (corner radius) on the stability ... -
Toward a Universal Roughness Correlation
(The American Society of Mechanical Engineers (ASME), 2017)The effects of several surface parameters on equivalent sand roughness (ks) in fully rough regime are investigated by means of direct numerical simulation (DNS) of flow in channels with different wall geometries at Reτ≅500. ... -
State-of-the-Art of Pressure Drop in Open-Cell Porous Foams: Review of Experiments and Correlations
(The American Society of Mechanical Engineers (ASME), 2017)Foam structures are a class of modern microporous media that possesses high thermal conductivity, large accessible specific surface area, and high porosities. Nowadays, industrial applications, such as filtration, heat ... -
Modeling of Cavitation-Induced Air Release Phenomena in Micro-Orifice Flows
(The American Society of Mechanical Engineers (ASME), 2017)Impurities like air bubbles in hydraulic liquids can significantly affect the performance and reliability of hydraulic systems. The aim of this study was to develop a model suited for hydraulic system simulation to determine ... -
URANS Models for the Simulation of Full Load Pressure Surge in Francis Turbines Validated by Particle Image Velocimetry
(The American Society of Mechanical Engineers (ASME), 2017)Due to the penetration of alternative renewable energies, the stabilization of the electrical power network relies on the off-design operation of turbines and pump-turbines in hydro-power plants. The occurrence of cavitation ...