Journal of Fluids Engineering: Recent submissions
Now showing items 2661-2680 of 9024
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Experimental Study on Aerodynamics of Microelectromechanical Systems Based Single Crystal Silicon Microscale Supersonic Nozzle
(The American Society of Mechanical Engineers (ASME), 2013)In this paper, the design, microfabrication, and direct measurement of the static pressure distribution for the aerodynamics of a singlecrystalsilicon microscale supersonic nozzle are described. The microscale supersonic ... -
Friction Factor for Transient Flow in Transverse Corrugated Pipes
(The American Society of Mechanical Engineers (ASME), 2013)Since the pressure losses in corrugated pipe flows are very high, their friction factor was investigated experimentally. Results of measurements of friction factor in laminar to turbulent transition zone of water flow in ... -
Numerical Simulation of the Breakup of Elliptical Liquid Jet in Still Air
(The American Society of Mechanical Engineers (ASME), 2013)The numerical simulation of liquid jets ejecting from a set of elliptical orifices with different aspect ratios between 1 (circular) and 3.85 is performed for several Weber numbers, ranging from 15 to 330. The axisswitching ... -
Mixing Evaluation of a Passive Scaled Up Serpentine Micromixer With Slanted Grooves
(The American Society of Mechanical Engineers (ASME), 2013)A novel, passive, scaledup micromixer based on fluid rotation is proposed and evaluated experimentally and numerically over Reynolds numbers ranging from 0.5 to 100. Flow visualization is employed to qualitatively assess ... -
Combined Experimental and Computational Investigation of Unsteady Structure of Sheet/Cloud Cavitation
(The American Society of Mechanical Engineers (ASME), 2013)The objective of this paper is to apply combined experimental and computational modeling to investigate unsteady sheet/cloud cavitating flows. In the numerical simulations, a filterbased density corrected model (FBDCM) is ... -
Numerical Study of Two Dimensional Circular Cylinders in Tandem at Moderate Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2013)Computer simulations of the flow around a pair of twodimensional, tandem circular cylinders in a flow, for Reynolds numbers in the range 1–40, are described. Cylinder surfacetosurface separations in the range 0.1<s/D<400 ... -
A Numerical Study of the Impact of Wavy Walls on Steady Fluid Flow Through a Curved Tube
(The American Society of Mechanical Engineers (ASME), 2013)In this paper, we discuss the impact of a wavywalled pipe crosssection on steady flow in a curved tube at moderate Dean numbers and small tube radiustoradiusofcurvature ratios. Parameters investigated include the protrusion ... -
A General Model for Predicting Low Reynolds Number Flow Pressure Drop in Non Uniform Microchannels of Non Circular Cross Section in Continuum and Slip Flow Regimes
(The American Society of Mechanical Engineers (ASME), 2013)A general model that predicts singlephase creeping flow pressure drop in microchannels of a noncircular cross section under slip and noslip regimes is proposed. The model accounts for gradual variations in the cross section ... -
Effects of Freestream Turbulence on the Characteristics in the Boundary Layer Near the Transition Onset Location
(The American Society of Mechanical Engineers (ASME), 2013)Experimental data is presented for a flat plate test facility with augmented levels of freestream turbulence (FST). The turbulence decay downstream of two turbulence generating grids, in addition to the integral length ... -
Droplet Detachment Mechanism in a High Speed Gaseous Microflow
(The American Society of Mechanical Engineers (ASME), 2013)This paper experimentally investigates the mechanism of water droplet detachment in a confined microchannel under highly inertial (10 < Re < 200) air flow conditions. Experimental observations show that as ... -
Large Scale Circulation in a Rectangular Enclosure With Periodic Boundary Temperature
(The American Society of Mechanical Engineers (ASME), 2013)An experiment in a rectangular basin of water is used to demonstrate that a largescale circulation will result from a zeromean thermal forcing. The thermal force is a spatially periodic pattern of heating and cooling at ... -
Vortex Shedding in a Tandem Circular Cylinder System With a Yawed Downstream Cylinder
(The American Society of Mechanical Engineers (ASME), 2013)This investigation examines the flow produced by a tandem cylinder system with the downstream cylinder yawed to the mean flow direction. The yaw angle was varied from خ±=90deg (two parallel tandem cylinders) to خ±=60deg; ... -
High Pressure Turbine Low Radius Radial TOBI Discharge Coefficient Validation Process
(The American Society of Mechanical Engineers (ASME), 2013)A TOBI (tangential on board injection), or preswirl, system is a critical component of a high pressure turbine cooling delivery system. Its efficient performance and characterization are critical because the blade and disk ... -
Hydraulic Improvement to Eliminate S Shaped Curve in Pump Turbine
(The American Society of Mechanical Engineers (ASME), 2013)For pump turbines, an Sshaped curve can lead to failures in synchronization. To improve the hydraulic design, the component that is responsible for the formation of the Sshaped curve was identified by a hydraulic loss ... -
Thermal Crack Propagation
(The American Society of Mechanical Engineers (ASME), 1971)This study is concerned with the application of Griffith fracture theory to crack propagation induced by thermal means. The stress-strain field around an insulated crack, situated perpendicular ... -
Numerical Analysis of the Fluid Flow in the First Stage of a Two Stage Centrifugal Pump With a Vaned Diffuser
(The American Society of Mechanical Engineers (ASME), 2013)This work presents a numerical investigation of the fluid flow in the first stage of a twostage centrifugal pump with a vaned diffuser. A computational fluid dynamics (CFD) analysis is performed by using the ANSYSCFX ... -
Large Eddy Simulation of a Tunnel Ventilation Fan
(The American Society of Mechanical Engineers (ASME), 2013)In this paper we discuss a computational method focused on the prediction of unsteady aerodynamics, adequate for industrial turbomachinery. Here we focus on a single rotor device selected from a new family of large tunnel ... -
Analysis of Inverse Method Applied on Sandwich Probes
(The American Society of Mechanical Engineers (ASME), 2013)Parallel plate disks (PPD) are often used for analyzing the effect of small amplitude oscillations with different frequencies. These devices allow the imposing of a wellknown flow kinematics. Mass transfer problems and, ... -
Simulation of the Transitional Flow in a Low Pressure Gas Turbine Cascade With a High Order Discontinuous Galerkin Method
(The American Society of Mechanical Engineers (ASME), 2013)In the last decade, discontinuous Galerkin (DG) methods have been the subject of extensive research efforts because of their excellent performance in the highorder accurate discretization of advectiondiffusion problems on ... -
Energy Balance in Cavitation Erosion: From Bubble Collapse to Indentation of Material Surface
(The American Society of Mechanical Engineers (ASME), 2013)An original approach based on energy balance between vapor bubble collapse, emitted pressure wave, and neighboring solid wall response was proposed, developed, and tested to estimate the aggressiveness of cavitating flows. ...