Journal of Fluids Engineering: Recent submissions
Now showing items 881-900 of 9024
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Shear Layer Interactions With Fluid–Fluid Interface in the Wake of an Elliptical Cylinder
(The American Society of Mechanical Engineers (ASME), 2020)In this study, wake of an elliptic cylinder is analyzed in the presence of a fluid–fluid interface. The interactions between the interface and flow affect each other and hence different wake dynamics and interface topologies ... -
Experimental Study of a Bulb Turbine Model During Start-Up and at Speed-No-Load Conditions, Based on the Measurement of Unsteady Pressure
(The American Society of Mechanical Engineers (ASME), 2020)Experimental analysis of a bulb turbine during the start-up sequence and in speed-no-load (SNL) operating conditions was performed in a closed-loop circuit. This study focuses on pressure fluctuations across the machine. ... -
Small-Scale Rotor Design Variables and Their Effects on Aerodynamic and Aeroacoustic Performance of a Hovering Rotor
(The American Society of Mechanical Engineers (ASME), 2020)With the increased prominence of multicopter micro-aerial vehicles, more importance has been placed on the aerodynamic and acoustic performance of these systems, as their small-scale and lower Reynolds number regime provide ... -
Active Control of Passive and Active Particle Distribution at the Outlet of Double Y-Microchannel Using Pulsatile Flow
(The American Society of Mechanical Engineers (ASME), 2020)While a variety of active and passive techniques have been proposed for steady flows, pulsatile flow has received much less attention. Pulsation makes more control parameters available for passive methods and enables them ... -
Liquid Impingement Flow and Heat Transfer of a Cone Heat Sink With Filet Profiles
(The American Society of Mechanical Engineers (ASME), 2020)Jet impingement is a technique for removing heat efficiently. A liquid jet impingement on a cone heat sink was investigated numerically to explore the effect of filet profiles at the top and bottom edge of conical protuberances ... -
On Nonlinear Rotating Non-Newtonian Jets With Ambient Flows
(The American Society of Mechanical Engineers (ASME), 2020)We consider the problem of nonlinear rotating non-Newtonian jets in the presence of ambient flows. Using the original governing system of equations for such jet flows, we use scaling and perturbation techniques to reduce ... -
Influence of Frequency-Dependent Friction Modeling on the Simulation of Transient Flows in High-Pressure Flow Pipelines
(The American Society of Mechanical Engineers (ASME), 2020)Frequency-dependent friction can be an important dissipative factor for unsteady flows. In this research investigation, various popular models have been reviewed thoroughly and then applied to evaluate frequency-dependent ... -
Harvesting Energy From an Ionic Polymer–Metal Composite in a Steady Air Flow
(The American Society of Mechanical Engineers (ASME), 2020)The paper presents the results of an investigation of a possibility for energy harvesting from a flexible material such as an ionic polymer–metal composite (IPMC) placed in a steady flow of air characteristic of conditions ... -
Numerical Study of Rotor–Stator Interaction of a Centrifugal Pump at Part Load With Special Emphasis on Unsteady Blade Load
(The American Society of Mechanical Engineers (ASME), 2020)Three-dimensional (3D) unsteady Reynolds-averaged Navier–Stokes (URANS) flow simulations are conducted to investigate the highly unsteady flow field at part load operation of a centrifugal pump. By the availability of ... -
Active Flow Control of a Pump-Induced Wall-Normal Vortex With Steady Blowing
(The American Society of Mechanical Engineers (ASME), 2020)The emergence of a submerged vortex upstream of a pump can reduce pump intake efficiency and cause structural damage. In this study, we consider the use of active flow control with steady blowing to increase the pressure ... -
Drag Reduction by Polymers in Saline Nutrient Solutions
(The American Society of Mechanical Engineers (ASME), 2020)Drag reduction (DR) by polymers has several industrial applications, and it has also shown to produce beneficial effects on blood circulation and may represent a way to treat cardiovascular disorders. Concerning medical ... -
Variational Approximations for Steady Unidirectional Slip Flows in Microchannels
(The American Society of Mechanical Engineers (ASME), 2020)Consider steady flows in a channel, cross section Ω, with the Navier slip boundary condition, and let the volume flowrate be denoted by Q. We present a new simple approximation, a rigorous lower bound on Q, requiring, along ... -
Impact of Wall Waviness on the Convection Patterns Inside a Horizontal Porous Annulus
(The American Society of Mechanical Engineers (ASME), 2020)A numerical simulation of natural convection in a horizontal porous annulus with an internal wavy surface has been carried out. Governing equations include the heat equation and the hydrodynamics equations under Darcy law ... -
Drag on Sticky and Janus (Slip-Stick) Spheres Confined in a Channel
(The American Society of Mechanical Engineers (ASME), 2020)Flow over a sphere is a frequently occurring phenomenon in a range of industries. The sphere is confined in a channel in most of these applications. Therefore, it is important to understand the effect of confinement on the ... -
Symmetric and Asymmetric Disturbances in the Rayleigh Zone of an Air-Assisted Liquid Sheet: Theoretical and Experimental Analysis
(The American Society of Mechanical Engineers (ASME), 2020)The temporal analysis of symmetric (dilatational) and asymmetric (sinusoidal) perturbations at the interface of a water sheet in a coflowing air stream focuses on low gas Weber number region (Weg < 0.4), namely, Rayleigh ... -
Effects of Transpiration on the Unsteady Separated Stagnation-Point Flow and Heat Transfer Over a Moving Porous Plate
(The American Society of Mechanical Engineers (ASME), 2020)The combined influence of normal transpiration and tangential movement of a porous surface on the unsteady separated stagnation-point flow and heat transfer of a viscous fluid is studied. This study is based on five physical ... -
Investigation on the Horn-Like Vortices in Stator Corner Separation Flow in an Axial Flow Pump
(The American Society of Mechanical Engineers (ASME), 2020)Stator corner separation flow existing in the guide-vane domain has significant effects on the characteristics of an axial-flow pump. The objective of this paper is to investigate the vortical structures in stator corner ... -
Numerical and Experimental Analyses of Breakwater Designs for Turbulent Flow Characteristics and Sediment Transport Under Coastal Wave Actions
(The American Society of Mechanical Engineers (ASME), 2020)The goal of the study is to identify optimal breakwater designs to be placed on the banks of various water bodies in coastal Louisiana, to prevent the coastal erosion. Coastal erosion is a significant concern for Louisiana's ... -
Computational Fluid Dynamics Modeling of Gaseous Cavitation in Lubricating Vane Pumps: An Approach Based on Dimensional Analysis
(The American Society of Mechanical Engineers (ASME), 2020)This paper addresses the problem of computational fluid dynamics (CFD) modeling of gaseous cavitation (GC) in lubricating positive-displacement pumps (PDPs). It is important for designers and analysts to predict the dynamic ... -
Droplet Impacting on a Hydrophobic Surface: Influence of Surface Wetting State on Droplet Behavior
(The American Society of Mechanical Engineers (ASME), 2020)Water droplet impacting onto a hydrophobic surface is considered and the influence of the surface wetting state on the droplet dynamics is examined. Pressure variation in the impacting droplet is predicted numerically using ...