Journal of Fluids Engineering: Recent submissions
Now showing items 281-300 of 9024
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Effects of Blockage Ratio on the Spatiotemporal Dynamics of Turbulent Flow Separation Around a Square Cylinder at Moderate Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2024)The effects of blockage ratio (BR) on turbulent flows around square cylinders at moderate Reynolds numbers are investigated using a time-resolved particle image velocimetry (TR-PIV). The blockage ratios range from 2.5% to ... -
Plume Spreading Due to Floor Conditions of a Plunging Liquid Jet Using Stereographic Backlit Imaging
(The American Society of Mechanical Engineers (ASME), 2024)Plunging liquid jets are a multiphase flow studied to understand how gas is entrained in a liquid and the resulting mixing capabilities. From existing literature, it has been hypothesized that rising bubbles play a noticeable ... -
Energy Exascale Computational Fluid Dynamics Simulations With the Spectral Element Method
(The American Society of Mechanical Engineers (ASME), 2024)Development and application of the open-source GPU-based fluid-thermal simulation code, NekRS, are described. Time advancement is based on an efficient kth-order accurate timesplit formulation coupled with scalable iterative ... -
Exascale Computational Fluid Dynamics in Heterogeneous Systems
(The American Society of Mechanical Engineers (ASME), 2024)Exascale computing has extended the reach of resolved flow simulations in complex, heterogeneous systems far beyond conventional computational fluid dynamics capabilities. As a result, unprecedented pore and microscale ... -
PeleMP: The Multiphysics Solver for the Combustion Pele Adaptive Mesh Refinement Code Suite
(The American Society of Mechanical Engineers (ASME), 2024)Combustion encompasses multiscale, multiphase reacting flow physics spanning a wide range of scales from the molecular scales, where chemical reactions occur, to the device scales, where the turbulent flow is affected by ... -
Performance Portable Graphics Processing Unit Acceleration of a High-Order Finite Element Multiphysics Application
(The American Society of Mechanical Engineers (ASME), 2024)The Lawrence Livermore National Laboratory (LLNL) will soon have in place the El Capitan exascale supercomputer, based on advanced micro devices (AMD) graphics processing units (GPUs). As part of a multiyear effort under ... -
Toward Polydisperse Flows With mfix-exa
(The American Society of Mechanical Engineers (ASME), 2024)In the presence of large size disparities, single-grid neighbor search algorithms lead to inflated neighbor lists that significantly degrade the performance of Lagrangian particle solvers. If Eulerian–Lagrangian (EL) ... -
Localized Blowing for Near-Wake Flow and Vortical Structure Control in Turbulent Boundary Layers Over Periodic Two-Dimensional Roughness
(The American Society of Mechanical Engineers (ASME), 2023)Volumetric three-component flow measurements were made to investigate localized blowing (injection) as a control strategy for turbulent boundary layers over k-type two-dimensional (2D) roughness. The flow measurements were ... -
A Method to Determine Bubble Distribution in Liquid Using Data of Inverse Acoustical Scattering
(The American Society of Mechanical Engineers (ASME), 2023)Information on bubble distributions in liquids is required for various applications. Employment of inverse acoustic scattering is the usual path to determine these distributions. This path is based on solving a Fredholm ... -
Improving Three-Dimensional Synthetic Jet Modeling in a Crossflow
(The American Society of Mechanical Engineers (ASME), 2024)Three different circular synthetic jet modeling inlet conditions are studied for a turbulent crossflow. The study examines the differences when modeling the whole synthetic jet actuators (SJA), neck-only or jet-slot-only ... -
Physical Mechanisms Leading to Large Unsteady Pressure Fluctuations in a Gas Turbine Testing Facility
(The American Society of Mechanical Engineers (ASME), 2024)This paper is a detailed computational study of the flow within a scale model of a gas turbine engine testing facility. At mass flows representative of tests for large, high bypass ratio turbofans, large amplitude low-frequency ... -
Ground Effect Investigation on the Aerodynamic Airfoil Behavior Using Large Eddy Simulation
(The American Society of Mechanical Engineers (ASME), 2024)The underlying physics ever behind the aerodynamics of an airfoil in ground effect (GE) are still not fully resolved. In this work, the aerodynamics for an airfoil in GE is investigated computationally for both transitional ... -
Particle Image Velocimetry in a Centrifugal Pump: Influence of Walls on the Flow at Different Axial Positions
(The American Society of Mechanical Engineers (ASME), 2023)For almost a century, humans have relied on centrifugal pumps for the transport of low-viscous fluids in commercial, agricultural, and industrial activities. Details of the fluid flow in impellers often influence the overall ... -
Numerical Simulation of Free Surface Water Waves Around Wavy Hydrofoils: Prediction of Hydrodynamic Coefficients Using Machine Learning
(The American Society of Mechanical Engineers (ASME), 2023)This study uses computational methods to investigate the fluid flow characteristics around a wavy NACA 63(4)-021 hydrofoil near the water surface. It introduces notable contributions to the literature on sinusoidal edge ... -
Numerical Investigations of Turbulent Flow Through a 90-Degree Pipe Bend and Honeycomb Straightener
(The American Society of Mechanical Engineers (ASME), 2023)Pipe bends are commonly used in piping systems in offshore and subsea installations. The present study explores the design considerations for the honeycomb straightener inserted downstream of a 90-degree pipe bend. The ... -
Unified Approach for Damping Rate of Transient Laminar Flow: Experiments, Computational Fluid Dynamics, and One-Dimensional, and Global Models
(The American Society of Mechanical Engineers (ASME), 2023)Pipe networks exhibit complex geometries and are equipped with electromechanical devices capable of generating hydraulic transients. Most of these devices are remotely controlled and managed through an integrated system ... -
Extending the Pressure-Time Method to Pipe With Variable Cross-Section With Three-Dimensional Numerical Simulations
(The American Society of Mechanical Engineers (ASME), 2023)The flowrate in hydraulic turbines can be measured using the pressure-time method specified by the IEC 60041 standard. This method assumes a one-dimensional (1D) flow and is limited to straight pipes with a uniform cross ... -
Optimal Transient Energy Growth of Two-Dimensional Perturbation in a Magnetohydrodynamic Plane Poiseuille Flow of Casson Fluid
(The American Society of Mechanical Engineers (ASME), 2023)The study investigates the influence of the Casson fluid parameter and the spanwise uniform magnetic field on the onset of instability against infinitesimal disturbances in an electrically conducting fluid flow between two ... -
Effect of Bronchial Blood Flow on Respiratory Heat Exchange: A Mathematical Analysis for Infectious Diseases
(The American Society of Mechanical Engineers (ASME), 2023)The present study aims to mathematically analyze the role of bronchial blood flow on heat transfer in respiratory infections. In general, the exchange of heat transfer in various infectious diseases like COVID-19 caused ... -
Model Verification and Experimental Study of the Turbomachinery Wake Flow Field Reconstruction
(The American Society of Mechanical Engineers (ASME), 2023)A clear understanding of the turbomachinery wake flow field is one of the key problems in developing turbomachinery aerodynamics. The theoretical model of helical vortices is established in cylindrical coordinates (r,θ,z), ...