Journal of Fluids Engineering: Recent submissions
Now showing items 761-780 of 9024
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Shear Effects on Scalar Transport in Double Diffusive Convection1
(The American Society of Mechanical Engineers (ASME), 2020)In this article, we examine the effect of shear on scalar transport in double diffusive convection (DDC). DDC results from the competing action of a stably stratified, rapidly diffusing scalar (temperature) and an unstably ... -
A Comparison of Interface Growth Models Applied to Rayleigh–Taylor and Richtmyer–Meshkov Instabilities
(The American Society of Mechanical Engineers (ASME), 2020)Sophisticated numerical models that contain fluid interfaces rely upon interface evolution models to approximate the transition to turbulence near interfaces, in the presence of Rayleigh–Taylor (RTI) or Richtmyer–Meshkov ... -
Internal Geometry and External Wall Effects on Fluidic Oscillator Behavior
(The American Society of Mechanical Engineers (ASME), 2020)This study quantified the correlation of internal geometry (including Coanda effects) and external walls on oscillation frequency for a fluidic oscillator that was tested for a variety of mass flow rates using CO2 gas. The ... -
Flow Around Three Side-by-Side Square Cylinders and the Effect of the Cylinder Oscillation
(The American Society of Mechanical Engineers (ASME), 2020)In this study, the flow field over three square cylinders (SCs) arranged side by side is investigated in a low-speed wind tunnel. The experiments are performed with three similar SCs for Reynolds number (Re) 295. The ... -
Identification of Cavitation Instabilities on a Three-Bladed Inducer by Means of Strain Gages
(The American Society of Mechanical Engineers (ASME), 2020)This paper reports the experimental characterization of the cavitation-induced flow instabilities of a high head three-bladed inducer at design condition detected simultaneously by means of piezoelectric pressure transducers ... -
Lubrication Characteristics of Water-Lubricated Rubber Bearings With Partial Wear
(The American Society of Mechanical Engineers (ASME), 2020)Water-lubricated rubber bearings are widely used in the propulsion shafting of military craft and ships. These bearings may wear down after a period of service, and consequently, their lubrication characteristics will ... -
Hydraulic Simulation for Calcasieu Lake Area With Small Rivers Using an Immersed Boundary Method
(The American Society of Mechanical Engineers (ASME), 2020)A coupled one-dimensional (1D) and two-dimensional (2D) hydrodynamic model for small rivers and streams on a large background area using an immersed boundary method (IBM) was developed and implemented for a simple flooding ... -
Influences of Rotational Speed Variations on the Flow-Induced Vibrational Performance of a Prototype Reversible Pump Turbine in Spin-No-Load Mode
(The American Society of Mechanical Engineers (ASME), 2020)During the spin-no-load mode, vibrational performance of the reversible pump turbine is an important criterion for the evaluation of the operational performances of the power station. In the present paper, the influences ... -
Experimental Investigation of the Transient Patterns and Pressure Evolution of Tip Leakage Vortex and Induced-Vortices Cavitation in an Axial Flow Pump
(The American Society of Mechanical Engineers (ASME), 2020)Cavitating flow is extremely complex in axial and mixed flow pumps, resulting in several adverse effects on pump performance. In this paper, the tip leakage vortex (TLV) cavitation patterns in an axial flow pump model were ... -
Experimental Study on the Effect of Localized Blockages on the Friction Factor of a 61-Pin Wire-Wrapped Bundle
(The American Society of Mechanical Engineers (ASME), 2020)The thermal-hydraulic behavior of the flow in rod bundles has motivated numerous experimental and computational investigations. Previous studies have identified potential for accumulation of debris within the small subchannels ... -
Experimental Investigation of a 10 MW Prototype Axial Turbine Runner: Vortex Rope Formation and Mitigation
(The American Society of Mechanical Engineers (ASME), 2020)The transient load fluctuations on the runner blades of prototype hydraulic turbines during load variations are one of the main causes of fatigue and eventual structural failure. A clear understanding of the dynamic loads ... -
Laminar Vortex Shedding in the Wake of a Cube
(The American Society of Mechanical Engineers (ASME), 2020)Flow around a cube is numerically studied in the laminar vortex shedding regime. The objective is to examine the three-dimensional vortex shedding mechanism and understand the temporal behavior of the wake. Vortices were ... -
Three-Dimensional Simulation of Highly Unsteady and Isothermal Flow in Centrifugal Pumps for the Local Loss Analysis Including a Wall Function for Entropy Production
(The American Society of Mechanical Engineers (ASME), 2020)A local loss analysis (LLA) based on entropy production is presented for the numerical three-dimensional (3D) simulation of isothermal centrifugal pump flow. A finite volume method and a statistical turbulence model are ... -
Image-Based Feedback Control for a Coaxial Spray
(The American Society of Mechanical Engineers (ASME), 2020)Optimization of jet engine sprays has the potential to improve efficiency and reduce environmental impact. Sprays can be continually optimized in multivariate scenarios using real-time feedback control, but a method of ... -
Improved Discrete Random Walk Stochastic Model for Simulating Particle Dispersion and Deposition in Inhomogeneous Turbulent Flows
(The American Society of Mechanical Engineers (ASME), 2020)The performance of different versions of the discrete random walk models in turbulent flows with nonuniform normal root-mean-square (RMS) velocity fluctuations and turbulence time scales were carefully investigated. The ... -
Optical-Flow Algorithm for Near-Wake Analysis of Axisymmetric Blunt-Based Body at Low-Speed Conditions
(The American Society of Mechanical Engineers (ASME), 2020)In this study, ability of an optical-flow algorithm in extracting wake structure of axisymmetric model was investigated. The initial data for optical-flow processing were obtained in low-speed conditions by particle image ... -
Experimental Study of the Hydraulic Performances of Two Three-Bladed Inducers in Water, Water With Dissolved CO2, and Jet Fuel
(The American Society of Mechanical Engineers (ASME), 2020)Inducers in centrifugal pumps are generally placed upstream to increase the pressure before the impeller and prevent cavitation occurrence. Their general goal is to obtain a positive impact on the performances of a pump ... -
Compound Droplet Modeling for Circulating Tumor Cell Microfiltration With Adaptive Meshing Refinement
(The American Society of Mechanical Engineers (ASME), 2020)Advances in microfluidics inaugurate a new possibility of designing diagnostic devices for early cancer detection. There is a growing interest in deformation-based microfiltration for capturing circulating tumor cells ... -
Implementation of Stair-Shaped Dielectric Layers in Micro- and Macroplasma Actuators for Increased Efficiency and Lifetime
(The American Society of Mechanical Engineers (ASME), 2020)Plasma actuators are electronic devices commonly used for active flow control. These devices have been shown to be effective in a wide variety of fluids engineering applications. In order to increase the efficiency of these ... -
Estimation of Ventilation Impact on Fluid–Structure Interaction for Partially Cavitating Hydrofoils
(The American Society of Mechanical Engineers (ASME), 2020)Fluid–structure interaction is analyzed for natural and ventilated partial cavitation of conventional hydrofoils. Quasi-linear two-dimensional (2D) analysis of ideal fluid incompressible flow outside the cavity is coupled ...