Journal of Fluids Engineering: Recent submissions
Now showing items 3721-3740 of 9024
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Design Principles and Measured Performance of Multistage Radial Flow Microturbomachinery at Low Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2008)This paper introduces and experimentally demonstrates the design concept of multistage microturbomachinery, which is fabricated using silicon microfabrication technology. The design process for ... -
Laminar Non-Newtonian Fluid Flow in Noncircular Ducts and Microchannels
(The American Society of Mechanical Engineers (ASME), 2008)Non-Newtonian fluid flow in noncircular ducts and microchannels is examined. A simple model is proposed for power law fluids based on the Rabinowitsch–Mooney formulation. By means of a new ... -
Computational Dynamics of a Thermally Decomposable Viscoelastic Lubricant Under Shear
(The American Society of Mechanical Engineers (ASME), 2008)The effect of viscoelasticity on the thermodynamic performance of a thermally decomposable lubricant subjected to shear and Arrhenius kinetics is investigated with direct numerical simulations. A ... -
A Three-Equation Eddy-Viscosity Model for Reynolds-Averaged Navier–Stokes Simulations of Transitional Flow
(The American Society of Mechanical Engineers (ASME), 2008)An eddy-viscosity turbulence model employing three additional transport equations is presented and applied to a number of transitional flow test cases. The model is based on the k-ω framework ... -
Instantaneous Liquid Flow Rate Measurement Utilizing the Dynamics of Laminar Pipe Flow
(The American Society of Mechanical Engineers (ASME), 2008)This paper deals with the utilization of the dynamic characteristics of laminar flow in circular pipes for the indirect measurement of flow rates. A discrete-time state space realization of the ... -
Grid Independence Via Automated Unstructured Adaptation
(The American Society of Mechanical Engineers (ASME), 2008)Grid independence is frequently an overlooked item in computational fluid dynamics (CFD) analyses. Results obtained from grid dependent solutions may prove to be costly, in that engineering design ... -
Experimental Study on the Amplitude of a Free Surface Fluctuation
(The American Society of Mechanical Engineers (ASME), 2008)An experimental study was performed to measure the fluctuation phenomena of a free surface in a vessel with or without an internal structure. A flow enters from the bottom and flows out of ... -
Instabilities of Nonreturn Valves in Low-Speed Air Systems
(The American Society of Mechanical Engineers (ASME), 2008)Practical observations of the nonreturn valve wear in aero-engine cabin-bleed systems suggest that such valves are subject to unstable behavior. A theoretical model for the prediction of nonreturn ... -
The Effect of Impeller Cutback on the Fluid-Dynamic Pulsations and Load at the Blade-Passing Frequency in a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2008)A study is presented on the fluid-dynamic pulsations and the corresponding dynamic forces generated in a centrifugal pump with single suction and vaneless volute due to blade-volute interaction. ... -
Experiments and Models of the Magneto Rheological Behavior of High Weight Percent Suspensions of Carbonyl Iron Particles in Silicone Oil
(The American Society of Mechanical Engineers (ASME), 2008)Flow properties of magnetorheological (MR) fluids are greatly altered by the application of a magnetic field. The design, optimization, and control of novel devices that exploit MR fluid behavior ... -
Vortex Breakdown in an Enclosed Cylinder With a Partially Rotating Bottom-Wall
(The American Society of Mechanical Engineers (ASME), 2008)A numerical study of the axisymmetric flow in a cylindrical chamber of height H is presented, which is driven by a bottom disk rotating at angular velocity Ω. However, unlike most previous ... -
The Influence of Slip Boundary Conditions on Peristaltic Pumping in a Rectangular Channel
(The American Society of Mechanical Engineers (ASME), 2008)The flow of an incompressible fluid is modeled in a channel of a rectangular cross section with two symmetric peristaltic waves propagating on the top and bottom. A low Reynolds number and ... -
Hydrodynamic Characterization of a Nozzle Check Valve by Numerical Simulation
(The American Society of Mechanical Engineers (ASME), 2008)The ability to obtain correct estimates of the hydraulic characteristics of a nozzle check valve by finite-volume numerical simulation is discussed. The evaluation of the numerical results is ... -
Hydraulic Circuit Design Rules to Remove the Dependence of the Injected Fuel Amount on Dwell Time in Multijet CR Systems
(The American Society of Mechanical Engineers (ASME), 2008)In multijet common rail (CR) systems, the capability to manage multiple injections with full flexibility in the choice of the dwell time (DT) between consecutive solenoid current pulses is one ... -
Numerically Investigating the Effects of Cross-Links in Scaled Microchannel Heat Sinks
(The American Society of Mechanical Engineers (ASME), 2008)Thermal management as a method of heightening performance in miniaturized electronic devices using microchannel heat sinks has recently become of interest to researchers and the industry. One of ... -
The Impact of Manifold-to-Orifice Turning Angle on Sharp-Edge Orifice Flow Characteristics in Both Cavitation and Noncavitation Turbulent Flow Regimes
(The American Society of Mechanical Engineers (ASME), 2008)The approach taken was to analyze the results in a manner consistent with application by design engineers to new and existing applications, while providing some insight into the processes that ... -
Interested in Cavitation Erosion?
(The American Society of Mechanical Engineers (ASME), 2007)ASTM's Subcommittee G02.10 on Erosion would like to hear from you if you have any interest in cavitation erosion testing. Do you (or your organization): -
Alternate Scales for Turbulent Flow in Transitional Rough Pipes: Universal Log Laws
(The American Society of Mechanical Engineers (ASME), 2007)In transitional rough pipes, the present work deals with alternate four new scales, the inner wall transitional roughness variable ζ=Z+∕ϕ, associated with a particular roughness level, defined ... -
Experimental and Analytical Study of the Pressure Drop Across a Double-Outlet Vortex Chamber
(The American Society of Mechanical Engineers (ASME), 2007)This paper presents experimental and analytical results concerning the pressure drop and the core size in vortex chambers. The new formulation is based on the conservation of mass and energy ... -
Numerical Analysis of Wall Slip Effects on Flow of Newtonian and Non-Newtonian Fluids in Macro and Micro Contraction Channels
(The American Society of Mechanical Engineers (ASME), 2007)We performed numerical simulation to investigate the effects of wall slip on flow behaviors of Newtonian and non-Newtonian fluids in macro and micro contraction channels. The results show that ...