Journal of Fluids Engineering: Recent submissions
Now showing items 441-460 of 9024
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Estimation of Discretization Uncertainty Using the γ−Reθ Transition Model for Transitional Flows on 6:1 Spheroid
(The American Society of Mechanical Engineers (ASME), 2022)This paper aims to estimate the surface mesh size related discretization uncertainties using the γ−Reθ transition model combined with the shear stress transport (SST) k–ω turbulence model. For comparison, this work employs ... -
Investigation of Tyre Pattern Effect on the Aerodynamics of a Passenger Vehicle
(The American Society of Mechanical Engineers (ASME), 2022)The wheels of a passenger vehicle are one of the major contributors to the total aerodynamic drag, making their aerodynamic performance a considerable factor for the overall energy efficiency of the vehicle. Previous studies ... -
Adjoint Analysis of Plane Poiseuille Flow Global and Convective Stability
(The American Society of Mechanical Engineers (ASME), 2022)The adjoint analysis of plane Poiseuille flow is conducted for both global and convective stability problems. Receptivity and structural sensitivity are analyzed using a stabilized finite element method. In the global ... -
A Numerical Study of the Flow Field Driven by a Submerged, High-Speed, Gaseous Jet
(The American Society of Mechanical Engineers (ASME), 2022)The analysis of the numerical study of underwater high-speed gas jets is presented in this study. This work aims to understand the development of the flow structure of the gas jets submerged in water and assess the performance ... -
High Efficiency Energy Harvesting Using a Savonius Turbine With Multicurve and Auxiliary Blade
(The American Society of Mechanical Engineers (ASME), 2022)A new blade configuration is proposed to further increase the performance of a Savonius rotor through a sequence of unsteady two-dimensional (2D) computational fluid dynamics (CFD) simulations. The blade is made by a ... -
Ground Effect of a Two-Dimensional Flapping Wing Hovering in Inclined Stroke Plane
(The American Society of Mechanical Engineers (ASME), 2022)The ground effect aerodynamics and flow physics of a 2D dragonfly wing hovering (the Reynolds number is 157) in an inclined stroke plane are investigated via solving 2D unsteady incompressible laminar flow Navier–Stokes ... -
Overturn Prevention Simulation of a Truck With Corner Nozzles
(The American Society of Mechanical Engineers (ASME), 2022)This paper investigates the performance of an aerodynamic device called corner nozzles (CN) on a truck to improve its crosswind stability. The CN consists of two air-guiding plates that are attached to the base of the ... -
Suppression of Cavitation Instabilities in an Inducer by the Circumferential Groove With Swirl Breakers
(The American Society of Mechanical Engineers (ASME), 2022)A circumferential groove with swirl breakers was designed and its effect on the suppression of cavitation instabilities in an inducer was investigated in experiments. The circumferential groove with the swirl breakers could ... -
Numerical and Experimental Investigation of the Performance of Tandem Vanes for a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2022)Conventional vane designs come with the disadvantage of flow detachment for high deflection. For axial machines, often tandem vanes are prevalent which combines two vanes for redirection of the flow and thus effectively ... -
Siphon Break Phenomena Associated With Pipe Leakage Location
(The American Society of Mechanical Engineers (ASME), 2022)This work investigates the siphon break phenomenon associated with pipe leakage location. The present study is divided into two parts: (1) an unsteady three-dimensional (3D) computational fluid dynamics (CFD) model is ... -
Numerical Analysis of Water Jet Injection in the Draft Tube of a Francis Turbine at Part Load Operations
(The American Society of Mechanical Engineers (ASME), 2022)The off-design operation of Francis turbines results in the onset of flow instabilities. These instabilities lead to severe pressure pulsations, power swings, fatigue damage, and torque fluctuations in the turbine unit. ... -
Spray Entrainment Coefficient Modeling for High Injection Pressure Based on Entrainment Velocity and Force Analysis
(The American Society of Mechanical Engineers (ASME), 2022)The entrainment coefficient reflects the air–fuel mixing quality, which is one of the foremost concerns for the development of cleaner and higher power-density internal combustion engines. Previous prediction models ... -
Interactions Between Shock Waves and Liquid Droplet Clusters: Interfacial Physics
(The American Society of Mechanical Engineers (ASME), 2022)This study quantitatively investigates the behaviors of single and multiple liquid cylinders placed in the path of a traveling normal shock wave using high-fidelity numerical simulations. The research is motivated by ... -
Interfacial Characteristics of Power-Law Viscoelastic Fluid With Heat and Mass Transfer in Planar Configuration
(The American Society of Mechanical Engineers (ASME), 2022)In this study, a linear stability principle is utilized to investigate the Rayleigh–Taylor stability at the power-law viscoelastic fluid/inviscid gas interface. The power-law viscoelastic fluid lies above the gas and heat ... -
The Structure of Inclined Choked Gas Jet
(The American Society of Mechanical Engineers (ASME), 2022)The injection of choked gaseous jets into the still air is investigated experimentally motivated by many industrial applications including flares and burners. The objective is to study the effect of injection angle on the ... -
Design and Parametric Analysis of a Mach 4 Wind Tunnel for SSLCs Studies
(The American Society of Mechanical Engineers (ASME), 2022)The use of shear sensitive liquid crystals (SSLCs) provides a nonintrusive technique for accurate visualization and quantification of shear stress on surfaces under investigation. However, investigations using liquid crystal ... -
Investigation on the Pressure Fluctuation Characteristics for a Regenerative Flow Pump Under Different Blade Arrangements
(The American Society of Mechanical Engineers (ASME), 2022)The flow in the regenerative flow pump (RFP) is usually featured by unsteady flow fluctuation and complex interference efficacy. Two pump models with various blade arrangements were investigated in this study to explore ... -
Investigation of Relationship Between Flow Structures and Drag Forces on Microfin Enhanced Surfaces Using Large Eddy Simulations
(The American Society of Mechanical Engineers (ASME), 2022)This study proposes a numerical model to collect and analyze relationships between flow structures and drag forces on a microfin enhanced surface. We utilized a large eddy simulation (LES) with a localized, dynamic kinetic ... -
Local Entropy Generation Analysis for Cavitation Flow Within a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2022)Local entropy generation is derived from the second law of thermodynamics, which can directly identify the source of irreversible dissipation and learn more about the physical mechanism of performance degradation. Zwart ... -
An Optimization-Based Design Strategy for Centrifugal Compressors of Automotive Turbochargers and the Comparison of Five Particular Optimization Methods
(The American Society of Mechanical Engineers (ASME), 2022)It is possible to optimize a turbocharger's performance for a broad range of engine operating points. However, most of the turbochargers have distinctive performance characteristics independent of engine operation. Therefore, ...