Journal of Fluids Engineering: Recent submissions
Now showing items 2981-3000 of 9024
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Multidimensional Modeling of Natural Gas Jet and Mixture Formation in Direct Injection Spark Ignition Engines—Development and Validation of a Virtual Injector Model
(The American Society of Mechanical Engineers (ASME), 2011)During the last few years, the integration of CFD tools in the internal combustion (IC) engine design process has continually increased, allowing time and cost savings as the need for experimental ... -
Experimental Study of Near-Field Entrainment of Moderately Overpressured Jets
(The American Society of Mechanical Engineers (ASME), 2011)Particle image velocimetry (PIV) experiments have been conducted to study the velocity flow fields in the developing flow region of high-speed jets. These velocity distributions were examined to ... -
Flow Bistability Downstream of Three-Dimensional Double Backward Facing Steps at Zero-Degree Sideslip
(The American Society of Mechanical Engineers (ASME), 2011)The flow downstream of a three-dimensional double backward facing step (3D DBWFS) is investigated for Reynolds number Reh ranging from 5×103 to8×104 (based on the first step height h). ... -
Unstable Characteristics and Rotating Stall in Turbine Brake Operation of Pump-Turbines
(The American Society of Mechanical Engineers (ASME), 2011)Reversible pump-turbines are versatile in the electricity market since they can be switched between pump and turbine operation within a few minutes. The emphasis on the design of the more ... -
Using CFD to Study Combustion and Steam Flow Distribution Effects on Reheater Tubes Operation
(The American Society of Mechanical Engineers (ASME), 2011)The thickness measurements showed that boilers of the Shahid Rajaee power plant have a non-uniform thickness in some regions of the final reheater tubes after 80,000 h of operation. Experimental ... -
Integrated Motor/Propulsor Duct Optimization for Increased Vehicle and Propulsor Performance
(The American Society of Mechanical Engineers (ASME), 2011)This paper presents a computational study to better understand the underlying fluid dynamics associated with various duct shapes and the resultant impact on both total vehicle drag and propulsor ... -
Modeling and Simulation of Capillary Microfluidic Networks Based on Electrical Analogies
(The American Society of Mechanical Engineers (ASME), 2011)In this study we implemented the network simulation techniques using macromodels (lumped models) for capillary driven flows in microfluidic networks. The flow characteristics in a flow junction, ... -
Influence of Geometry on Starting Vortex and Ejector Performance
(The American Society of Mechanical Engineers (ASME), 2011)For many propulsion devices, the thrust may be augmented considerably by adding a passive ejector, and these devices are especially attractive for unsteady propulsion systems such as pulse ... -
Co-Current Gas-Liquid Smooth-Stratified Flow in a Horizontal Reduced T-Junction Including Wavy and Slug Regime Transition Boundaries
(The American Society of Mechanical Engineers (ASME), 2011)Experiments were performed in a horizontal reduced T-junction using a branch diameter of 6.35 mm and an inlet pipe diameter of 50.8 mm. The inlet length was 1.8 m and three branch orientations ... -
Dissipation and Cavitation Characteristics of Single-Hole Orifices
(The American Society of Mechanical Engineers (ASME), 2011)The purpose of this work is to study the dependence of the pressure losses through sharp-edged orifices with respect to the most significant parameters and to find an efficient way to check ... -
Internal Flow Losses: A Fresh Look at Old Concepts
(The American Society of Mechanical Engineers (ASME), 2011)Losses in a flow field due to single conduit components often are characterized by experimentally determined head loss coefficients K. These coefficients are defined and determined with the ... -
Manipulating Flow to Reduce Drag of a Square Cylinder by Using a Self-Sustained Vibrating Rod
(The American Society of Mechanical Engineers (ASME), 2011)The flow, vortex shedding, and surface pressure of a square cylinder at incidence were manipulated by means of a self-sustained vibrating rod placed around the leading edge of the upwind-facing ... -
Characteristics of Turbulent Three-Dimensional Offset Jets
(The American Society of Mechanical Engineers (ASME), 2011)Three-dimensional turbulent offset jets were investigated using a particle image velocimetry technique. Three jet exit Reynolds numbers, Rej = 5000, 10,000, and 20,000, and four offset heights, ... -
On the Modeling and Simulation of Ion Drag Electrohydrodynamic Micropumps
(The American Society of Mechanical Engineers (ASME), 2011)A numerical model for ion-drag electrohydrodynamic (EHD) micropumps has been developed. The Poisson and charge conservation equations are solved to determine the electric body force within the ... -
Study on Performance and Flow Condition of a Cross-Flow Wind Turbine With a Symmetrical Casing
(The American Society of Mechanical Engineers (ASME), 2011)A cross-flow wind turbine has a high torque coefficient at a low tip speed ratio. Therefore, it is a good candidate for use as a self-starting turbine. Furthermore, it has low noise and ... -
Reynolds Stress Anisotropy Based Turbulent Eddy Viscosity Model Applied to Numerical Ocean Models
(The American Society of Mechanical Engineers (ASME), 2011)The present state-of-the-art ocean models use an eddy viscosity that depends on structure parameter (Cμ ). In this paper we use a Reynolds stress anisotropy based formulation for the eddy ... -
Retraction: “Vortical Stuctures in a Decelerated Wall-Bounded Turbulent Flow” [Journal of Fluids Engineering, 2011, 133(5), 051205]
(The American Society of Mechanical Engineers (ASME), 2011) -
Experimental Evidence of Rotating Stall in a Pump-Turbine at Off-Design Conditions in Generating Mode
(The American Society of Mechanical Engineers (ASME), 2011)An experimental investigation of the rotating stall in reduced scale model of a low specific speed radial pump-turbine at runaway and turbine brake conditions in generating mode is achieved. ... -
Thermodynamic Effect on Subsynchronous Rotating Cavitation and Surge Mode Oscillation in a Space Inducer
(The American Society of Mechanical Engineers (ASME), 2011)The relationship between the thermodynamic effect and subsynchronous rotating cavitation was investigated with a focus on cavity fluctuations. Experiments on a three-bladed inducer were conducted ... -
Manifold Design for Micro-Channel Cooling With Uniform Flow Distribution
(The American Society of Mechanical Engineers (ASME), 2011)High-power electronic systems often require temperature uniformity for optimal performance. While many advanced cooling systems, such as micro-channels, result in significant heat removal, they are ...