Journal of Fluids Engineering: Recent submissions
Now showing items 4441-4460 of 9024
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Backward-Facing Step Flows for Various Expansion Ratios at Low and Moderate Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2004)This paper is concerned with the behavior of flows over a backward-facing step geometry for various expansion ratios H/h=1.9423, 2.5 and 3.0. A literature survey was carried out and it was ... -
Application of Preconditioning Method to Gas-Liquid Two-Phase Flow Computations
(The American Society of Mechanical Engineers (ASME), 2004)A preconditioned numerical method for gas-liquid two-phase flows is applied to solve cavitating flow. The present method employs a finite-difference method of the dual time-stepping integration ... -
Separation Criterion for Turbulent Boundary Layers Via Similarity Analysis
(The American Society of Mechanical Engineers (ASME), 2004)By using the RANS boundary layer equations, it will be shown that the outer part of an adverse pressure gradient turbulent boundary layer tends to remain in equilibrium similarity, even near ... -
Transition to Meandering Rivulet Flow in Vertical Parallel-Plate Channels
(The American Society of Mechanical Engineers (ASME), 2004)While there have been many studies of gravity-driven rivulet flow over an external surface, treatment of internal rivulets has been sparse. A notable exception is the analytical and experimental ... -
The Modeling of Lift and Dispersion Forces in Two-Fluid Model Simulations of a Bubbly Jet
(The American Society of Mechanical Engineers (ASME), 2004)Two-fluid model simulations of a bubbly vertical jet are presented. The purpose of these simulations is to assess the modeling of lift and turbulent dispersion forces in a free shear flow. ... -
Erratum: “On Preferred Perturbations Selected by Centrifugal Instability” [Journal of Fluids Engineering, 2001, 123, pp. 702–705]
(The American Society of Mechanical Engineers (ASME), 2004)1. The fourth equation in the system (2) was printed incorrectly. The correct system is: γUu+Go2U′v−Bfu′=u″−β2uDisplay FormulaγUv+V′v−Bfv′+2Uu+q′=v″−β2vγUw−Bfw′−βq=w″−β2wγu+Go2(v′+βw)=Bηu′ -
An Improved Three-Dimensional Level Set Method for Gas-Liquid Two-Phase Flows
(The American Society of Mechanical Engineers (ASME), 2004)For the present study, we developed a three-dimensional numerical method based on the level set method that is applicable to two-phase systems with high-density ratio. The present solver for ... -
The Characteristics-Based Matching (CBM) Method for Compressible Flow With Moving Boundaries and Interfaces
(The American Society of Mechanical Engineers (ASME), 2004)Recently, Eulerian methods for capturing interfaces in multi-fluid problems become increasingly popular. While these methods can effectively handle significant deformations of interface, the treatment ... -
Method for Analyzing the Performance of Centrifugal Oil Pumps
(The American Society of Mechanical Engineers (ASME), 2004)The hydraulic performance of centrifugal oil pumps can be illustrated by using three curves: head-flow rate, power-flow rate and efficiency-flow rate. Figure 1 shows the performance curves of ... -
Interfacial Structures and Regime Transition in Co-Current Downward Bubbly Flow
(The American Society of Mechanical Engineers (ASME), 2004)The vertical co-current downward air-water two-phase flow was studied under adiabatic condition in round tube test sections of 25.4-mm and 50.8-mm ID. In flow regime identification, a new approach ... -
The Modeling of Thin Liquid Films Along Inclined Surfaces
(The American Society of Mechanical Engineers (ASME), 2004)This paper is concerned with the analysis of thin and ultra-thin liquid films. The results are applicable to various geometrical and kinematic conditions, including both stationary and moving ... -
Local Liquid Velocity in Vertical Air-Water Downward Flow
(The American Society of Mechanical Engineers (ASME), 2004)This paper presents an experimental study of local liquid velocity measurement in downward air-water bubbly and slug flows in a 50.8 mm inner-diameter round pipe. The axial liquid velocity and ... -
Two-Phase Flow Through Square and Circular Microchannels—Effects of Channel Geometry
(The American Society of Mechanical Engineers (ASME), 2004)An adiabatic experiment was conducted to investigate the effect of channel geometry on gas-liquid two-phase flow characteristics in horizontal microchannels. A water-nitrogen gas mixture was pumped ... -
Discussion: Criticisms of the “Correction Factor” Verification Method 1
(The American Society of Mechanical Engineers (ASME), 2004)The technical brief by Roache 1 presents seven criticisms of the correction factor verification method proposed by the authors and colleagues in 234. The authors acknowledge Dr. Roache’s careful ... -
Aerobreakup in Rarefied Supersonic Gas Flows
(The American Society of Mechanical Engineers (ASME), 2004)We present new experimental results on the interfacial instabilities and breakup of Newtonian liquid drops suddenly exposed to rarefied, high-speed (Mach 3) air flows. The experimental approach ... -
Oil-Water Separation in a Novel Liquid-Liquid Cylindrical Cyclone (LLCC©) Compact Separator—Experiments and Modeling
(The American Society of Mechanical Engineers (ASME), 2004)The hydrodynamics of multiphase flow in a Liquid-Liquid Cylindrical Cyclone (LLCC) compact separator have been studied experimentally and theoretically for evaluation of its performance as a free ... -
An Experimental Study on the Influence of Flow Maldistribution on the Pressure Drop Across a Plate Heat Exchanger
(The American Society of Mechanical Engineers (ASME), 2004)A detailed experimental study on flow maldistribution from port to channel of a plate heat exchanger is presented. In general, flow maldistribution brings about an increase in pressure drop ... -
Erratum: “An Experimentally Validated Model for Two-Phase Pressure Drop in the Intermittent Flow Regime for Noncircular Microchannels,” [Journal of Fluids Engineering, 2003, 125, pp. 887–894]
(The American Society of Mechanical Engineers (ASME), 2004)1. By convention, pressure drop is treated as a positive value. Therefore, Eq. (11) should be as follows, i.e., without the negative sign on the right-hand side: -
Effects of Inclination Angle of Ribs on the Flow Behavior in Rectangular Ducts
(The American Society of Mechanical Engineers (ASME), 2004)The flow behavior in rib-roughened ducts is influenced by the inclination of ribs and the effect is investigated in the present study by Particle Image Velocimetry (PIV). The local flow ... -
Aerodynamic Entropy Generation Rate in a Boundary Layer With High Free Stream Turbulence
(The American Society of Mechanical Engineers (ASME), 2004)The loss mechanism under consideration in this study is that fraction of turbomachinery blade profile loss 1 due to viscous dissipation and turbulent phenomena in the blade boundary layer. In ...