Journal of Fluids Engineering: Recent submissions
Now showing items 961-980 of 9024
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Early Time Evolution of Circumferential Perturbation of Initial Particle Volume Fraction in Explosive Cylindrical Multiphase Dispersion
(American Society of Mechanical Engineers (ASME), 2019)When an annular bed of solid particles that surrounds a cylindrical high-energy explosive core gets radially dispersed after detonation, the expanding front of particles undergoes instabilities. One of the possible causes ... -
Effect of Inlet Structures on the Performance of Oil Supply System of a Variable Speed Rotary Compressor
(American Society of Mechanical Engineers (ASME), 2019)Variable speed rotary compressors are now increasingly favored in the market of household air-conditioners in China due to its advantage of energy saving and system stability. Oil supply system plays a pivotal role in high ... -
No-Load Stability Analysis of Pump Turbine at Startup-Grid Integration Process
(American Society of Mechanical Engineers (ASME), 2019)This paper focuses on no-load stability during startup-grid integration process. First, no-load operating dynamic character under startup-grid integration process is studied by bifurcation diagram, based on a classical ... -
Fully Coupled Smoothed Particle Hydrodynamics-Finite Element Method Approach for Fluid–Structure Interaction Problems With Large Deflections
(American Society of Mechanical Engineers (ASME), 2019)In this study, a combination of the smoothed particle hydrodynamics (SPH) and finite element method (FEM) solving the complex problem of interaction between fluid with free surface and an elastic structure is studied. A ... -
Multi-Objective Shape Optimization on the Inlet Pipe of a Vertical Inline Pump
(American Society of Mechanical Engineers (ASME), 2019)Vertical inline pump is a single-stage single-suction centrifugal pump with a bent pipe before the impeller, which is usually used where installation space is a constraint. In this paper, with three objective functions of ... -
Numerical Investigation of Flow in a Runner of Low-Head Bulb Turbine and Correlation With Particle Image Velocimetry and Laser Doppler Velocimetry Measurements
(American Society of Mechanical Engineers (ASME), 2019)It is a well-known fact and a much studied problematic that the performance of low-head hydraulic turbines is highly dependent on the runner–draft tube coupling. Around the optimal operating conditions, the efficiency of ... -
In Situ Verification of Numerical Model of Water Hammer in Slurries
(American Society of Mechanical Engineers (ASME), 2019)This paper presents a numerical model of transient flow in a pressure slurry pipeline network with verification based on in situ measurements. The model, primarily verified in laboratory conditions, has been extended and ... -
Evaluation of Cavitation Erosion Intensity in a Microscale Nozzle Using Eulerian–Lagrangian Bubble Dynamic Simulation
(American Society of Mechanical Engineers (ASME), 2019)In the present study, cavitation erosion is investigated by implementing an Eulerian–Lagrangian approach. Three-dimensional two-phase flow is simulated in a microscale nozzle using Reynolds-averaged Navier–Stokes (RANS) ... -
Experimental Quantification of Vent Mechanism Flow Parameters in 18650 Format Lithium Ion Batteries
(American Society of Mechanical Engineers (ASME), 2019)Lithium ion batteries have a well-documented tendency to fail energetically under various abuse conditions. These conditions frequently result in decomposition of the electrochemical components within the battery resulting ... -
Investigation of the Pressure Drop Across Packed Beds of Spherical Beads: Comparison of Empirical Models With Pore-Level Computational Fluid Dynamics Simulations
(American Society of Mechanical Engineers (ASME), 2019)This study uses novel methods, combining discrete element method (DEM) simulations for packing and computational fluid dynamics (CFD) modeling of fluid flow, to simulate the pressure drop across rigid, randomly packed beds ... -
Theoretical Analysis of Computational Fluid Dynamics–Discrete Element Method Mathematical Model Solution Change With Varying Computational Cell Size
(American Society of Mechanical Engineers (ASME), 2019)Successful verification and validation is crucial to build confidence in the application of coupled computational fluid dynamics–discrete element method (CFD–DEM). Model verification includes ensuring a mesh-independent ... -
In Memoriam of Dr. Malcolm J. Andrews (1958–2019)
(American Society of Mechanical Engineers (ASME), 2019) -
Numerical Simulation of Drag Reduction in Microgrooved Substrates Using Lattice-Boltzmann Method
(American Society of Mechanical Engineers (ASME), 2019)We study drag reduction of a uniform flow over a flat surface due to a series of rectangular microgrooves created on the surface. The results reveal that making grooves on the surface usually leads to the generation of ... -
Cavitation in Transient Flows Through a Micro-Nozzle
(American Society of Mechanical Engineers (ASME), 2019)High cavitating or supercavitating flows in fuel injector systems are crucial since they improve the mixing and the fuel atomization into combustion chambers, decreasing both fuel consumption and pollutant emissions. ... -
Calculation of Friction Factors and Nusselt Numbers for Twisted Elliptical Tube Heat Exchangers Using Nek5000
(American Society of Mechanical Engineers (ASME), 2019)Twisted elliptical tube geometries for heat exchanger design are expected to offer significant enhancement in heat transfer with a marginal increase in frictional losses. The presented work focuses on computational fluid ... -
A Kriging Surrogate Model for Computing Gas Mixture Equations of State
(American Society of Mechanical Engineers (ASME), 2019)Accurate simulation of the complex flow following the detonation of an explosive material is a challenging problem. In these flows, the detonation products of the explosive must be treated as a real gas while the surrounding ... -
Research on Improving the Dynamic Performance of Centrifugal Pumps With Twisted Gap Drainage Blades
(American Society of Mechanical Engineers (ASME), 2019)Through numerical simulation and experiments analysis, it is indicated that the hydraulic and anticavitation performance of a centrifugal pump with twisted gap drainage blades based on flow control theory can be significantly ... -
Lattice Boltzmann Simulation of Micro Gas Flows Over a Wide Range of Knudsen Numbers
(American Society of Mechanical Engineers (ASME), 2019)To characterize the microflow over a larger range of Knudsen numbers, an improved kinetic equation considering the volume diffusion effect for nonideal gases was presented based on Klimontovich's kinetic equation and Enskog ... -
Visualization of Rotating Cavitation Oscillation Mechanism in a Turbopump Inducer
(American Society of Mechanical Engineers (ASME), 2019)An experimental investigation has been conducted on rotating cavitation in a turbopump inducer. Previous research suggested that incidence angle variation leads to rotating cavitation. This study, using particle image ... -
Numerical Analysis of the Deterministic Stresses Associated to Impeller-Tongue Interactions in a Single Volute Centrifugal Pump
(American Society of Mechanical Engineers (ASME), 2019)In this paper, a deterministic stress decomposition is applied over the numerical three-dimensional flow solution available for a single volute centrifugal pump. The numerical model has proven in previous publications its ...