Journal of Fluids Engineering: Recent submissions
Now showing items 3661-3680 of 9024
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NPSHr Optimization of Axial-Flow Pumps
(The American Society of Mechanical Engineers (ASME), 2008)The two-step method for optimizing net positive suction head required (NPSHr) of axial-flow pumps is proposed in this paper. First, the NPSHr at the impeller tip is optimized with impeller ... -
Pressure Drop Predictions in Microfibrous Materials Using Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2008)Three-dimensional computational fluid dynamics simulations are performed for the flow of air through microfibrous materials for void fractions of 0.41 and 0.47 and face velocities ranging between ... -
Procedure for Estimation and Reporting of Uncertainty Due to Discretization in CFD Applications
(The American Society of Mechanical Engineers (ASME), 2008)Since 1990, the Fluids Engineering Division of ASME has pursued activities concerning the detection, estimation and control of numerical uncertainty and/or error in computational fluid dynamics ... -
Evaluation of the Mixing Performance of the Micromixers With Grooved or Obstructed Channels
(The American Society of Mechanical Engineers (ASME), 2008)The mixing flows in microchannels were examined using numerical methods. To speed up fluid mixing, it is essential to generate lateral transport of mass. In this study, the mixing flow is ... -
Aerodynamics of Large-Scale Vortex Generator in Ground Effect
(The American Society of Mechanical Engineers (ASME), 2008)The aerodynamic performance of several vortex generators (VGs) of the type used on the lower surface of race cars was tested in a low-speed wind tunnel. In this particular application, the ... -
Analytic and Experimental Investigation of Dihedral Configurations of Three-Winglet Planforms
(The American Society of Mechanical Engineers (ASME), 2008)An analytic and experimental effort was undertaken to assess the effectiveness and efficiency of three winglets mounted chordwise to the tip of a rectangular wing. The winglets, with an aspect ... -
Comparison Between Theoretical CFV Flow Models and NIST’s Primary Flow Data in the Laminar, Turbulent, and Transition Flow Regimes
(The American Society of Mechanical Engineers (ASME), 2008)State-of-the art dimensional metrology was used to measure the throat diameter and throat curvature of nine critical flow venturis (CFVs) with nominal throat diameters ranging from 5mmto25mm. The ... -
Measurement of Velocities in Two-Phase Flow by Laser Velocimetry: Interaction Between Solid Particles’ Motion and Turbulence
(The American Society of Mechanical Engineers (ASME), 2008)In this work, an experimental method based on laser anemometry with Doppller effects is developed. This allows the measurement of velocities and their fluctuations in a flow of solid-liquid ... -
An Alternating Magnetic Field Driven Flow in a Spinning Cylindrical Container
(The American Society of Mechanical Engineers (ASME), 2008)This paper presents a numerical analysis of the free surface liquid metal flow driven by an alternating current magnetic field in a spinning cylindrical container. The axisymmetric flow structure ... -
Optimization of High Flow Rate Nanoporous Electroosmotic Pump
(The American Society of Mechanical Engineers (ASME), 2008)We present a theory for optimizing the thermodynamic efficiency of an electroosmotic (EO) pump with a large surface area highly charged nanoporous silica disk substrate. It was found that the ... -
Computational Simulation on Performance Enhancement of Cold Gas Dynamic Spray Processes With Electrostatic Assist
(The American Society of Mechanical Engineers (ASME), 2008)A real-time computational simulation on the entire cold spray process is carried out by the integrated model of compressible flow field, splat formation model, and coating formation model, in ... -
Soret Effect for a Ternary Mixture in Porous Cavity: Modeling With Variable Diffusion Coefficients and Viscosity
(The American Society of Mechanical Engineers (ASME), 2008)A porous cavity filled with methane (C1), n-butane (nC4), and dodecane (C12) at a pressure of 35.0MPa is used to investigate numerically the flow interaction due to the presence of thermodiffusion ... -
Dense Particulate Flow in a Cold Gas Dynamic Spray System
(The American Society of Mechanical Engineers (ASME), 2008)The effect of particle-gas and particle-particle interactions in a cold spray process is studied when the particle loading is high. To examine the effect of the presence of a dense particulate ... -
Calculation of DEP and EWOD Forces for Application in Digital Microfluidics
(The American Society of Mechanical Engineers (ASME), 2008)Two primary methods for electrostatically actuating microdroplets in channels currently exist: dielectrophoresis (DEP) for electrically insulating fluids and electrowetting on dielectric (EWOD) for ... -
An Analytical Method for Dielectrophoresis and Traveling Wave Dielectrophoresis Generated by an n-Phase Interdigitated Parallel Electrode Array
(The American Society of Mechanical Engineers (ASME), 2008)In this paper, we present an analytical method for solving the electric potential equation with the exact boundary condition. We analyze the dielectrophoresis (DEP) force with an n-phase ac ... -
Flow Induced Unstable Structure of Liquid Crystalline Polymer Solution in L-Shaped Slit Channels
(The American Society of Mechanical Engineers (ASME), 2008)An experimental study has been conducted on unstable structures induced in two-dimensional slit flows of liquid crystalline polymer solution. 50wt% aqueous solution of hydroxyl-propylcellulose (HPC) ... -
Drop Formation in Non-Newtonian Jets at Low Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2008)The objective of this study was to develop an experimentally verified computational model that accurately predicts evolution of shear-thinning liquid jets. A secondary objective was to investigate ... -
Galerkin Least-Squares Multifield Approximations for Flows of Inelastic Non-Newtonian Fluids
(The American Society of Mechanical Engineers (ASME), 2008)The aim of this work is to investigate a Galerkin least-squares (GLS) multifield formulation for inelastic non-Newtonian fluid flows. We present the mechanical modeling of isochoric flows combining ... -
Modeling and Measurement of the Dynamic Surface Tension of Surfactant Solutions
(The American Society of Mechanical Engineers (ASME), 2008)Surfactant solutions are usually used under conditions accompanied by transient dynamic surfaces, and therefore the dynamic surface tension (DST) is important in many industrial processes. Theories ... -
Rheological and Hydraulic Properties of Welan Gum Fluids in Straight and Coiled Tubings
(The American Society of Mechanical Engineers (ASME), 2008)This study involves experimental investigation of the hydraulic characteristics of aqueous based welan gum fluids of concentrations 1.4kg∕m3, 2.9kg∕m3, 5.7kg∕m3, and 8.6kg∕m3 in both straight and ...