Journal of Fluids Engineering: Recent submissions
Now showing items 3881-3900 of 9024
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On the Use of High-Order Accurate Solutions of PNS Schemes as Basic Flows for Stability Analysis of Hypersonic Axisymmetric Flows
(The American Society of Mechanical Engineers (ASME), 2007)High-order accurate solutions of parabolized Navier–Stokes (PNS) schemes are used as basic flow models for stability analysis of hypersonic axisymmetric flows over blunt and sharp cones at Mach ... -
Streaming Electric Potential in Pressure-Driven Flows Through Reservoir-Connected Microchannels
(The American Society of Mechanical Engineers (ASME), 2007)Electrical power generation employing pressure-driven flows is a fundamental problem in microfluidics. In the present work, analytical and numerical analyses are performed to study the interplaying ... -
Flow Instability and Disk Vibration of Shrouded Corotating Disk System
(The American Society of Mechanical Engineers (ASME), 2007)This paper focuses on the interaction between the flow unsteadiness and disk vibration of shrouded corotating disk system to identify the nature of the flow-induced vibration of disks in the ... -
Frequencies in the Vibration Induced by the Rotor Stator Interaction in a Centrifugal Pump Turbine
(The American Society of Mechanical Engineers (ASME), 2007)The highest vibration levels in large pump turbines are, in general, originated in the rotor stator interaction (RSI). This vibration has specific characteristics that can be clearly observed ... -
Friction Factor Directly From Transitional Roughness in a Turbulent Pipe Flow
(The American Society of Mechanical Engineers (ASME), 2007)The friction factor data from transitional rough test pipes, from the measurements of and (2003, “ Friction Factor Directly From Roughness Measurements,” J. Energy Resour. Technol.125, pp. 126–130), ... -
Transient Behavior of Turbomachineries: Applications to Radial Flow Pump Startups
(The American Society of Mechanical Engineers (ASME), 2007)A theoretical analysis of the fast transients of turbomachineries, based on the study of unsteady and incompressible fluids mechanics equations applied to an impeller, is proposed. It leads to ... -
Scars and Vortices Induced by Ship Bow and Shoulder Wave Breaking
(The American Society of Mechanical Engineers (ASME), 2007)Experimental data are provided for physical understanding and computational fluid dynamics (CFD) validation for the surface combatant David–Taylor model basin Model 5415 bow and shoulder wave ... -
The Effects of Air Preheat and Number of Orifices on Flow and Emissions in an RQL Mixing Section
(The American Society of Mechanical Engineers (ASME), 2007)This study was motivated by a goal to understand the mixing and emissions in the rich-burn/quick-mix/lean-burn combustor scheme that has been proposed to minimize the formation of oxides of ... -
Kinematic and Dynamic Parameters of a Liquid-Solid Pipe Flow Using DPIV∕Accelerometry
(The American Society of Mechanical Engineers (ASME), 2007)An experimental investigation of a two-phase pipe flow was undertaken to study kinematic and dynamic parameters of the fluid and solid phases. To accomplish this, a two-color digital particle ... -
On the Applicability of a Spoked-Wheel Wake Generator for Clocking Investigations
(The American Society of Mechanical Engineers (ASME), 2007)A comprehensive investigation was carried out using two different experimental setups: A 1.5-stage axial turbine and a simplified model, a “spoked-wheel” setup with a rotating wake generator ... -
Linear Instability of Entry Flow in a Pipe
(The American Society of Mechanical Engineers (ASME), 2007)We show that flow in the entry region of a circular pipe is linearly unstable at a Reynolds number of 1000, a factor of 10 smaller than assumed hitherto. The implication that dynamics in ... -
A General Strategy to Extend Turbulence Models to Rough Surfaces: Application to Smith’s k-L Model
(The American Society of Mechanical Engineers (ASME), 2007)A general procedure to extend turbulence models to account for wall roughness, in the framework of the equivalent sand grain approach, is proposed. It is based on the prescription of the ... -
Measurements of Rotordynamic Forces on an Artificial Heart Pump Impeller
(The American Society of Mechanical Engineers (ASME), 2007)In centrifugal pumps for artificial hearts, a magnetic drive with lightly loaded journal bearing system is often used. In such a system, the rigidity of the bearing is small and the impeller ... -
Friction Factor Correlations for Gas Flow in Slip Flow Regime
(The American Society of Mechanical Engineers (ASME), 2007)Poiseuille number, the product of friction factor and Reynolds number (fRe) for quasi-fully-developed gas microchannel flow in the slip flow regime, was obtained numerically based on the ... -
Representing Polydispersed Droplet Behavior in Nucleating Steam Flow
(The American Society of Mechanical Engineers (ASME), 2007)The quadrature method of moments (QMOM) is applied to the particle size distribution (PSD) present in nucleating steam flow, with a particular emphasis on conditions relevant to low-pressure ... -
Implicit Large-Eddy Simulation in Meteorology: From Boundary Layers to Climate
(The American Society of Mechanical Engineers (ASME), 2007)The dynamics of the atmosphere and oceans pose a severe challenge to the numerical modeler, due in large part to the broad range of scales of length and time that are encompassed. Modern ... -
Numerical Simulations of Peristaltic Mixing
(The American Society of Mechanical Engineers (ASME), 2007)Numerical simulations of two-dimensional flow and species transport in a peristaltically driven closed mixer are performed as a function of the Reynolds number (Re⩽6288) and the normalized traveling ... -
Assessment of Predictive Capabilities of Detached Eddy Simulation to Simulate Flow and Mass Transport Past Open Cavities
(The American Society of Mechanical Engineers (ASME), 2007)The three-dimensional (3D) incompressible flow past an open cavity in a channel is predicted using the Spalart–Almaras (SA) and the shear-stress-transport model (SST) based versions of detached ... -
Annular Extrudate Swell of Newtonian Fluids: Effects of Compressibility and Slip at the Wall
(The American Society of Mechanical Engineers (ASME), 2007)Numerical simulations have been undertaken for the benchmark problem of annular extrudate swell present in pipe extrusion and parison formation in blow molding. The effects of weak compressibility ... -
A Generalized Neural Network Model of Refrigerant Mass Flow Through Adiabatic Capillary Tubes and Short Tube Orifices
(The American Society of Mechanical Engineers (ASME), 2007)Adiabatic capillary tubes and short tube orifices are widely used as expansive devices in refrigeration, residential air conditioners, and heat pumps. In this paper, a generalized neural network ...