Journal of Fluids Engineering: Recent submissions
Now showing items 801-820 of 9024
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Parametric Analysis and Optimization of Leaning Angle in Torque Converters
(The American Society of Mechanical Engineers (ASME), 2020)Torque converters are durable fluid couplings that can provide output torque multiplication. Blade leaning angle represents the angular position of a blade chord with respect to its radial reference line, and it is an ... -
Reynolds-Averaged Simulation of the Fully Developed Turbulent Drag Reduction Flow in Concentric Annuli
(The American Society of Mechanical Engineers (ASME), 2020)Reynolds-averaged modeling is performed for polymer-induced drag reduction (DR) fluid at the fully developed turbulent regime in a concentric annulus by using the commercial code, ansys-fluent. The numerical approach adopted ... -
Influence of Pump Rotation Speed on Hydrodynamic Performance and Stator Blade Surface Pressure Pulsation in Torque Converter
(The American Society of Mechanical Engineers (ASME), 2020)An experimental investigation was performed to characterize the influence of pump rotation speed on the hydrodynamic performance and the associated unsteady pressure on the stator blade pressure-surface in a torque converter. ... -
Effects of Heart Rate on the Pulsatile Flow Characteristics of a Stenotic Aortic Valve Model: An In Vitro Experimental Study
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, the characteristics of pulsatile flow past a silicone-based artificial stenotic aortic valve under varied heart rates have been studied using particle image velocimetry (PIV). Pulsatile flow waveforms were ... -
Aerodynamic Performance Improvement of a Wing Model Using an Array of Slotted Synthetic Jets
(The American Society of Mechanical Engineers (ASME), 2020)This work deals with the improvement in aerodynamic performance of a NACA0025 wing model using an array of slotted synthetic jets (SJs). A novel SJ actuator was designed and located at 30% of the chord from the leading ... -
Effect of Blade Trailing Edge Cutting Angle on Unstable Flow and Vibration in a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 2020)The vibration induced by the unsteady fluid exciting force in a centrifugal pump is one of the important factors affecting the reliable operation of the pump. In this study, the cutting of the blade trailing edge of a ... -
Prediction of Hydroplaning Potential Using Fully Coupled Finite Element-Computational Fluid Dynamics Tire Models
(The American Society of Mechanical Engineers (ASME), 2020)Hydroplaning is a phenomenon that occurs when a layer of water between the tire and pavement pushes the tire upward. The tire detaches from the pavement, preventing it from providing sufficient forces and moments for the ... -
Enhanced Electro-Osmotic Flow of Power-Law Fluids in Hydrophilic Patterned Nanochannel
(The American Society of Mechanical Engineers (ASME), 2020)In this paper, electro-osmotic flow (EOF) enhancement of non-Newtonian power-law fluids in a modulated nanochannel with polarized wall is proposed. The channel walls are embedded with periodically arranged rectangular ... -
Numerical Investigation to Derive Correlations for Hydrodynamic Entrance Length in Very Low Reynolds Number Regime in Rectangular Microchannels
(The American Society of Mechanical Engineers (ASME), 2020)A three-dimensional laminar flow model was used for 37 Reynolds numbers (0.1, 0.2…1, 2…10, 20…100, and 200…1000) through six rectangular microchannels (aspect ratios: 1, 0.75, 0.5, 0.25, 0.2, and 0.125) to develop correlations ... -
Uniform and Gaussian Ultraviolet Light Intensity Distribution on Droplet for Selective Area Deposition of Particles
(The American Society of Mechanical Engineers (ASME), 2020)Particle transport through Marangoni convection inside a sessile droplet can be controlled by the ultraviolet (UV) light distribution on the surface. The photosensitive solution changes the surface tension gradient on the ... -
Erosion Wear on Runner of Francis Turbine in Jhimruk Hydroelectric Center
(The American Society of Mechanical Engineers (ASME), 2020)Erosion wear is a major problem for hydraulic turbines operating on rivers from the Himalaya Mountains. The runner is the most important energy conversion component but it suffers heavy damage due to direct contact with ... -
Instability of a Radially Moving Cylindrical Surface: A Viscous Potential Flow Approach
(The American Society of Mechanical Engineers (ASME), 2020)The effect of viscosity on the unstable interface of the cylindrical jet is analyzed through viscous potential flow approach. The jet is moving radially and jet interface is experiencing Rayleigh–Taylor type instability. ... -
Evaluation of PANS Methodology With Nonlinear Eddy Viscosity Closure: Flow Past a Heated Sphere
(The American Society of Mechanical Engineers (ASME), 2020)The partially averaged Navier–Stokes (PANS) approach has emerged as a viable scale-resolving bridging method over the last decade. Conventional PANS method, based on the linear eddy viscosity closure, overcomes the ... -
Dynamics of a Viscous Droplet in Return Bends of Microfluidic Channels
(The American Society of Mechanical Engineers (ASME), 2020)Return bends are frequently encountered in microfluidic systems. In this study, a three-dimensional spectral boundary element method for interfacial dynamics in Stokes flow has been adopted to investigate the dynamics of ... -
Closed-Loop Control of Transition by Local Dynamic Surface Modification
(The American Society of Mechanical Engineers (ASME), 2020)Direct numerical simulations (DNSs) were carried out in order reproduce the generation and control of transition on a flat plate by means of local dynamic surface modification. The configurations and flow conditions duplicate ... -
Investigation on Energy Loss in Centrifugal Pump Based on Entropy Generation and High-Order Spectrum Analysis
(The American Society of Mechanical Engineers (ASME), 2020)Full-open, straight-blade centrifugal pumps have the advantages of simple structure and high stability at high speeds. However, this type of centrifugal pump has a large internal energy loss and low efficiency. The flow ... -
Experimental Investigations of Cavitation Performance Breakdown in an Axial Waterjet Pump
(The American Society of Mechanical Engineers (ASME), 2020)This experimental study examines the mechanisms causing cavitation breakdown in an axial waterjet pump. The database includes performance curves, images of cavitation, measured changes to endwall pressure as the blade ... -
Influence of Screw Centrifugal Inducer on Internal Flow Structure of Vortex Pump
(The American Society of Mechanical Engineers (ASME), 2020)Installing an inducer upstream of the main impeller is an effective approach for improving the performances of a centrifugal pump. In order to study the influence of inducer on the internal flow characteristics and evolution ... -
Computational Fluid Dynamics Simulations of Aerodynamic Performance of Low-Pressure Axial Fans With Small Hub-to-Tip Diameter Ratio
(The American Society of Mechanical Engineers (ASME), 2020)Rotor-only ducted axial fans with small hub-to-tip diameter ratio are widely used in many branches of industry, especially for cooling and ventilation purposes. For such fans, extensive regions of backflow are present ... -
Drag Reduction Performance of Mechanically Degraded Dilute Polyethylene Oxide Solutions
(The American Society of Mechanical Engineers (ASME), 2020)Mechanical degradation of dilute solutions of polyethylene oxide (PEO) via chain scission was investigated within a turbulent pipe flow. Comparisons of the drag reduction performance with and without degradation were made ...