Journal of Fluids Engineering: Recent submissions
Now showing items 4401-4420 of 9024
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Effects of Surface Roughness and Turbulence Intensity on the Aerodynamic Losses Produced by the Suction Surface of a Simulated Turbine Airfoil
(The American Society of Mechanical Engineers (ASME), 2004)The effects of surface roughness on the aerodynamic performance of turbine airfoils are investigated with different inlet turbulence intensity levels of 0.9%, 5.5% and 16.2%. Three symmetric ... -
Flow Separation Within the Engine Inlet of an Uninhabited Combat Air Vehicle (UCAV)
(The American Society of Mechanical Engineers (ASME), 2004)This paper discusses the structure of the flow within the engine inlet of an uninhabited combat air vehicle (UCAV). The UCAV features a top-mounted, serpentine inlet leading to an engine buried ... -
Determination of Flow Rate Characteristics of Pneumatic Solenoid Valves Using an Isothermal Chamber
(The American Society of Mechanical Engineers (ASME), 2004)In this paper, two new methods for obtaining the sonic conductance and the critical pressure ratio of pneumatic valves are proposed. Both methods use a chamber that can approximate isothermal ... -
Flow Rate Measurements Using Flow-Induced Pipe Vibration
(The American Society of Mechanical Engineers (ASME), 2004)This paper investigates the possibility of developing a nonintrusive, low-cost, flow-rate measurement technique. The technique is based on signal noise from an accelerometer attached to the surface ... -
Computational Analysis of Wall Roughness Effects for Liquid Flow in Micro-Conduits
(The American Society of Mechanical Engineers (ASME), 2004)Fluid flow in microchannels or microtubes may differ in terms of wall frictional effects, and hence flow rates, when compared to macrochannels. Focusing on steady laminar fully developed flow ... -
Interfacial Electrokinetic Effect on the Microchannel Flow Linear Stability
(The American Society of Mechanical Engineers (ASME), 2004)The electrostatic double layer (EDL) effect on the linear hydrodynamic stability of microchannel flows is investigated. It is shown that the EDL destabilizes the Poiseuille flow considerably. The ... -
Dynamics of Electrorheological Suspensions Subjected to Spatially Nonuniform Electric Fields
(The American Society of Mechanical Engineers (ASME), 2004)A numerical method based on the distributed Lagrange multiplier method (DLM) is developed for the direct simulation of electrorheological (ER) liquids subjected to spatially nonuniform electric ... -
Rheology of Dilute Polymer Solutions and Engine Lubricants in High Deformation Rate Extensional Flows Produced by Bubble Collapse
(The American Society of Mechanical Engineers (ASME), 2004)We report a study of liquid jets formed by the collapse of bubbles under cavitation-generated pressure waves. Such jets involve an extensional flow which is characterized by high rates of ... -
A Kinetic Theory for Solutions of Nonhomogeneous Nematic Liquid Crystalline Polymers With Density Variations
(The American Society of Mechanical Engineers (ASME), 2004)The kinetic theory developed in [1] for solutions of nonhomogeneous nematic liquid crystalline polymers (LCPs) of spheroidal molecular configurations is extended to account for the translational ... -
Self-Calibrating Sensor for Measuring Density Through Stainless Steel Pipeline Wall
(The American Society of Mechanical Engineers (ASME), 2004)An ultrasonic instrument to measure the density of a liquid or slurry through a stainless steel pipeline wall is described. By using multiple reflections of the ultrasound within the stainless ... -
Fraction Solid Measurements on Solidifying Melt
(The American Society of Mechanical Engineers (ASME), 2004)A new indirect method to measure fraction solid in molten metals is presented. The method is based on the phenomena that when a metal sample (solid or liquid) rotates in a magnetic field ... -
Torque Measurements in Spin-Up Flow of Ferrofluids
(The American Society of Mechanical Engineers (ASME), 2004)Measurements of magnetic-field-induced torque in applied uniform rotating magnetic fields are presented and compared to theoretical analyses for water- and oil-based ferrofluids. These experiments ... -
Numerical Modeling of Formation of High-Speed Water Slugs
(The American Society of Mechanical Engineers (ASME), 2004)The objective of this work is to investigate acceleration of a water slug by the powder explosion. The process occurs in a device termed the water cannon, which entails a barrel with an ... -
Use of Resin Transfer Molding Simulation to Predict Flow, Saturation, and Compaction in the VARTM Process
(The American Society of Mechanical Engineers (ASME), 2004)The present paper examines the analysis and simulation of the vacuum assisted resin transfer molding process (VARTM). VARTM differs from the conventional resin transfer molding (RTM) in that the ... -
Macroscopic Effects of Surface Roughness in Confined Air Flow
(The American Society of Mechanical Engineers (ASME), 2004)The general framework deals with the winding of thin plastic films, in order to obtain good-quality rolls. This issue is tightly connected to the thickness of the residual air layer entrapped ... -
Buoyancy Convection During the Growth of SixGe1−x by the Traveling Solvent Method (TSM)
(The American Society of Mechanical Engineers (ASME), 2004)The traveling solvent method known as TSM is a process used to produce pure and homogeneous crystals structures. TSM has been tested on many alloys producing uniform and uncontaminated single ... -
Effects of Periodic Inflow Unsteadiness on the Time-Averaged Velocity Field and Pressure Recovery of a Diffusing Bend With Strong Curvature
(The American Society of Mechanical Engineers (ASME), 2004)This study examines the effects of periodic inflow unsteadiness on the flow development through fishtail-shaped diffusers utilized on small gas-turbine engines. In this application, periodic ... -
An Experimental Study of the Effect of Grid Turbulence on Shear Layer Evolution
(The American Society of Mechanical Engineers (ASME), 2004)An experiment was performed in a shear layer water tunnel to determine the effect that grid turbulence, introduced within the meeting of the two streams, had on the evolution of a free shear ... -
Rheological Properties and Frictional Pressure Loss of Drilling, Completion, and Stimulation Fluids in Coiled Tubing
(The American Society of Mechanical Engineers (ASME), 2004)The rheological properties and friction pressure losses of several common well-drilling, completion, and stimulation fluids have been investigated experimentally. These fluids include polymeric ... -
Experimental and Numerical Development of a Two-Phase Venturi Flow Meter
(The American Society of Mechanical Engineers (ASME), 2004)An algebraic model is developed access the gas and the liquid flow rates of a two-phase mixture through a Venturi tube. The flow meter operates with upward bubbly flows with low gas content, ...