Journal of Fluids Engineering: Recent submissions
Now showing items 121-140 of 8892
-
Analysis of Electroosmotically Modulated Peristaltic Transport of Third Grade Fluid in a Microtube Considering Slip-Dependent Zeta Potential
(The American Society of Mechanical Engineers (ASME), 2024)The present study investigates electro-osmotically modulated peristaltic transport of third-grade fluid through a microtube taking into consideration the intricate coupling of zeta potential and hydrodynamic slippage. The ... -
Investigation of the Influence of Flow Pattern on the Internal Corrosion in Horizontal–Vertical Downward Pipe With Oil–Water Flow
(The American Society of Mechanical Engineers (ASME), 2024)In the petroleum and petrochemical industries, oil–water flow is widespread inside the pipes. The existence of water often results in internal corrosion in the horizontal–vertical downward pipe when water contacts the pipe ... -
Validation of a RANS Turbulence Model for a S833 Wind Turbine Airfoil With a Trailing Edge Flap Using Oil Visualization and Pressure Taps
(The American Society of Mechanical Engineers (ASME), 2024)The aerodynamics of a small wind turbine blade was captured using a γ–Reθ k–ω shear stress transport transitional turbulence model tuned with production limiter coefficients at a Reynolds number of 1.70×105. The computational ... -
Experimental Investigation of Part Load Vortex Rope Mitigation With Rod Protrusion in an Axial Turbine
(The American Society of Mechanical Engineers (ASME), 2024)The present paper investigates the rotating vortex rope (RVR) mitigation on an axial turbine model by the radial protrusion of four cylindrical rods into the draft tube. RVR mitigation is of particular interest due to the ... -
Actuation Modeling of a Microfluidically Reconfigurable Radiofrequency Device
(The American Society of Mechanical Engineers (ASME), 2024)Microfluidic-based techniques have been shown to address limitations of reconfigurable radio frequency (RF) antennas and filters in efficiency, power handling capability, cost, and frequency tuning. However, the current ... -
A Study of Shock-Induced Transient Jets: The Impact of Exit Conditions on Mach Disk and Vortex Ring
(The American Society of Mechanical Engineers (ASME), 2024)We investigate the effect of exit pressure history on the flow characteristics of underexpanded transient jets. Using both experiments and numerical simulations, we study the dynamics of shock-cell and vortex structures ... -
Analysis and Modeling of Turbulence Anisotropy of a Swirled Hot Streak Flow
(The American Society of Mechanical Engineers (ASME), 2024)This study is carried out in the context of hot streak flows in high-pressure turbines, for which a correct prediction of the temperature evolution is required. The present work particularly focuses on the turbulence ... -
Reduction of Disk Friction Loss by Applying a Fin to the Back of a Centrifugal Impeller1
(The American Society of Mechanical Engineers (ASME), 2024)It is well known that the ratio of disk friction loss of low specific speed pumps is large. When the specific speed is 100 min−1, m3/min, m or less, the disk friction loss increases remarkably. In this study, focusing on ... -
The Interaction of Turbulent Spots With Low-Speed Streaks1
(The American Society of Mechanical Engineers (ASME), 2024)Turbulent spots are regions of turbulence surrounded by laminar flow that appear during the late stages of boundary layer transition. While turbulent spots are often studied in isolation, they usually occur near low-speed ... -
Inflow Conditions and the Flow Behavior of Submerged Annular Viscoplastic Non-Newtonian Jets
(The American Society of Mechanical Engineers (ASME), 2024)Submerged annular viscoplastic jet flows were studied numerically within the steady laminar flow regime. The impacts of inner-to-outer annular nozzle diameter ratio, and yield number, for uniform and fully-developed inflow ... -
Numerical Study of the Fluid Flow Over the Array of Rough Cylindrical Particles: An Analysis of Porous Media Flow1
(The American Society of Mechanical Engineers (ASME), 2024)The objective of the study is to thoroughly analyze the flow and heat transfer of Bingham plastic fluids through an array of uniformly gapped rough surface cylinders embedded between two confined boundaries. Radial notches ... -
A Multiscale Euler–Lagrange Model for High-Frequency Cavitation Noise Prediction
(The American Society of Mechanical Engineers (ASME), 2024)To simulate the microscale bubble distribution and its effect on high-frequency cavitation noise, we present a two-way transition and coupling Euler–Lagrange model. The model accounts for both cavity fission and environmental ... -
Experimental Investigation of the Performance of a Novel Adiabatic Swirl-Flow Separation Apparatus in Air–Water Two-Phase Flow
(The American Society of Mechanical Engineers (ASME), 2024)Experiments were performed for determining the efficacy of a swirl-flow apparatus for phase separation of a premixed two-phase air–water mixture. In the experiments gas and liquid flow rates were parametrically varied. The ... -
Comparison of Heat Transfer and Friction in Pipes With Various Internal Roughness
(The American Society of Mechanical Engineers (ASME), 2024)The heat transfer and friction factor of turbulent pipe flows with different internal roughness are experimentally investigated. Three types of roughness in forms of a mesh, hemispherical elements, and a coil are added to ... -
Effect of Bypass Duct on the Thrust Vectoring Performance of Dual Throat Nozzle in a Supersonic Aircraft
(The American Society of Mechanical Engineers (ASME), 2024)Due to its ability to maximize thrust vectoring performance, the bypass dual throat nozzle (BDTN) has an advantage over other fluidic vectoring controls. In this study, numerical simulation is performed to analyze the flow ... -
Design Method for Impeller of Centrifugal Pump With Guide Vanes Based on Oseen Vortex
(The American Society of Mechanical Engineers (ASME), 2024)Centrifugal pumps with guide vanes (GVs) are widely used in a pump as turbine, energy storage pump station, and water diversion project. The objective of this study is to establish a design method of centrifugal pumps for ... -
Evaluation of Thermoacoustic Instability for Chemically Reacting Flows Using Large-Eddy Simulations
(The American Society of Mechanical Engineers (ASME), 2024)Thermoacoustic instability for chemically reacting flows was investigated using large eddy simulations coupled with a lookup table for turbulence-chemistry closure. The onset of instability was evaluated from pressure ... -
An Aerodynamic Investigation of the Last-Stage Turbine in an Upgraded Gas Turbine
(The American Society of Mechanical Engineers (ASME), 2024)Due to the lengthy certification process for newly designed turbine blades, product upgrading of industrial gas turbine units is often performed solely on compressor and combustor. Since their inlet conditions are significantly ... -
Numerical Investigation of the Influence of Cavitation on the Runner Speed at Speed-No-Load and Runaway for a Francis Turbine of Low Specific Speed
(The American Society of Mechanical Engineers (ASME), 2024)Studies have shown that the runner speed of hydraulic turbines at no-load conditions is affected by cavitation. However, those studies did not provide explanations relating the variation of the no-load runner speed to ... -
Effect of Perforation on Vortex Characteristics of a Microvortex Generator Mounted on a Flat Plate
(The American Society of Mechanical Engineers (ASME), 2024)The effects of perforation on the characteristics of the downstream vortex of a microvortex generator (MVG) mounted on a flat plate, are numerically investigated in this paper. A single rectangular MVG with circular and ...