Journal of Fluids Engineering: Recent submissions
Now showing items 541-560 of 9024
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Investigation on the Propulsion of a Pump-Jet Propulsor in an Effective Wake
(The American Society of Mechanical Engineers (ASME), 2022)The propulsion and vortical flow of a preswirl pump-jet propulsor (PJP) under effective wake conditions are numerically investigated by improved delayed detached eddy simulation. The numerical results agree well with the ... -
Experimental and Numerical Investigation on the Transient Cavitating Flows in a Mixed Flow Pump With Different Number of Blades at Startup
(The American Society of Mechanical Engineers (ASME), 2022)The objective of this paper is to experimentally and numerically investigate the transient cavitation flow during the startup process of mixed flow pump with emphasis on studying the influence of blade numbers. The transient ... -
Airfoil Shape and Angle of Attack Optimization Based on Bézier Curve and Multi-Island Genetic Algorithm
(The American Society of Mechanical Engineers (ASME), 2022)In order to improve the aerodynamic performance of the airfoil, the airfoil shape and the angle of attack (AOA) are optimized at the same time by the multi-island genetic algorithm in this paper. The goal of the optimization ... -
A Numerical and Experimental Study of the Time-Averaged and Transient Flow Downstream of a Butterfly Valve
(The American Society of Mechanical Engineers (ASME), 2022)This research took the DN50 butterfly valve as the research object and studied the flow situation of butterfly valves with different shafts. The resistance characteristics, flow state, characteristics, and flow instability ... -
Numerical Assessment of Cavitation Erosion Risk in a Commercial Water-Jet Pump
(The American Society of Mechanical Engineers (ASME), 2022)In this paper, the risk of cavitation erosion is assessed in a commercial water-jet pump using a recently developed numerical erosion assessment method by Arabnejad et al. (2021, “Numerical Assessment of Cavitation Erosion ... -
Dynamic Stall Inception and Evolution Process Measured by High-Frequency Particle Image Velocimetry System in Low Specific Speed Impeller
(The American Society of Mechanical Engineers (ASME), 2022)Stall in centrifugal pumps is a complicated flow phenomenon, which is detrimental to the pumps' safety and stable operation. Using a high-frequency particle image velocimetry (PIV) system (f = 10k Hz) and a bench-scale ... -
Designing Multishape Dual-Gas Initial Conditions for the Study of Hydrodynamic Instabilities
(The American Society of Mechanical Engineers (ASME), 2022)The flow resulting from the rotation of a series of thin plates that initially separate two gases of different densities is analyzed using direct numerical simulations (DNSs). The 90-deg plates' rotation forms a vorticity ... -
Study on k−ω−Shear Stress Transport Corrections Applied to Airfoil Leading-Edge Roughness Under RANS Framework
(The American Society of Mechanical Engineers (ASME), 2022)A computational fluid dynamics study is carried out to model the effects of distributed roughness at the airfoil leading-edge using the equivalent sand grain approach and Reynolds-averaged Navier–Stokes equations. The ... -
Proper Orthogonal Decomposition Based on Vorticity: Application in a Two-Phase Slug Flow
(The American Society of Mechanical Engineers (ASME), 2022)Large-scale turbulent flow features in liquid (water) and gas (air) phases in the film region of two-phase slug flow are identified by using proper orthogonal decomposition (POD) of the vorticity fields. Linear combination ... -
Weber Equation Model of Flow Through a Variable-Permeability Porous Core Bounded by Fluid Layers
(The American Society of Mechanical Engineers (ASME), 2022)Flow-through and over a Brinkman porous layer of variable permeability, immersed in a fluid-filled channel, is modeled. The model governing equation through the porous layer inevitably gives rise to an inhomogeneous Weber's ... -
Analytical Modeling of Laminar Developing Flow Between Hydrophobic Surfaces With Different Slip-Velocities
(The American Society of Mechanical Engineers (ASME), 2022)Theoretical analysis of the entrance hydrodynamics of microchannels is an important design aspect in connection with the development of microfluidic devices. In this paper, pressure-driven fluid flow in the entrance region ... -
Higher Order Chemical Reaction and Radiation Effects on Magnetohydrodynamic Flow of a Maxwell Nanofluid With Cattaneo–Christov Heat Flux Model Over a Stretching Sheet in a Porous Medium
(The American Society of Mechanical Engineers (ASME), 2022)In this paper, we investigated the heat and mass transfer analysis of an MHD convection flow of Maxwell nanofluid with Cattaneo–Christov heat flux model along with a porous stretching sheet. The effects of thermal radiation, ... -
Study of the Hydraulic Performances of Two Inducers in Water—CO2 Mixture—Toward Performance Improvement With Suppression of Prerotation
(The American Society of Mechanical Engineers (ASME), 2022)The inducers increase the pressure available at the inlet of the impellers of centrifugal pumps. This technological solution may induce instabilities, such as prerotating flow at partial flow rates. The scientific literature ... -
Aeroelastic Analysis of a Single Element Composite Wing in Ground Effect Using Fluid–Structure Interaction
(The American Society of Mechanical Engineers (ASME), 2022)This work focuses on an advanced coupling of computational fluid dynamics (CFD) and structural finite element analysis (FEA) on the aeroelastic behavior of a single element inverted composite wing with the novelty of ... -
Polymer Solution With Very Low Relaxation Time: A Combined Numerical-Experimental Determination Strategy
(The American Society of Mechanical Engineers (ASME), 2022)For very low relaxation time (i.e., lesser than a microsecond), viscoelastic fluid experimental determination is difficult, if not impossible. In this work, the relaxation time measurement of a weakly elastic polymer ... -
Reconstruction of Ligaments and Droplets Via Multiview Digital Inline Holography
(The American Society of Mechanical Engineers (ASME), 2022)Digital inline holography (DIH) is a three-dimensional (3D) measurement technique widely used in the characterizations of particles, droplets, and bubbly flows. When collimated coherent light passes an object field, the ... -
Second Moment Closure Modeling and Direct Numerical Simulation of Stratified Shear Layers
(The American Society of Mechanical Engineers (ASME), 2022)Buoyant shear layers encountered in many engineering and environmental applications have been studied by researchers for decades. Often, these flows have high Reynolds and Richardson numbers, which leads to significant/intractable ... -
Sluice Gate Discharge From Momentum Balance
(The American Society of Mechanical Engineers (ASME), 2022)Discharge from sluice gate flows is commonly calculated using the Torricelli outflow velocity, which is inaccurate and must be corrected by a discharge coefficient. Moreover, this approach commonly only considers the ... -
Experimental Visualization of Liquid-Gas Interactions
(The American Society of Mechanical Engineers (ASME), 2022) -
Flow Visualization of Protection Effectiveness of Partition Walls and Face Masks
(The American Society of Mechanical Engineers (ASME), 2022)