Journal of Fluids Engineering: Recent submissions
Now showing items 341-360 of 9024
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Onto Quantifying Unsteady Propulsion Characteristics Using Momentum and Energy Control Volume Assessments
(The American Society of Mechanical Engineers (ASME), 3/20/2023 )This effort presents a novel approach to interrogate efficiency for unsteady, undulating propulsion using variable momentum and energy conservation (VMEC) assessments. These integral approaches utilize large amounts of ... -
Prediction and Validation of Flow Properties in Porous Lattice Structures
(The American Society of Mechanical Engineers (ASME), 1/25/2023 )High-porosity metal foams have been extensively studied as an attractive candidate for efficient and compact heat exchanger design. With the advancements in additive manufacturing, such foams can be manufactured with ... -
On the Unsteady Rotationally Symmetric Flow Between a Stationary and a Finite Rotating Disk With a Given Change in the Axial Velocity
(The American Society of Mechanical Engineers (ASME), 1/4/2023 1)We consider the scenario of an unsteady viscous flow between two coaxial finite disks, one stationary and the other rotating with an axial velocity changing impulsively from zero to a constant value. The three-dimensional ... -
Large Eddy Simulation Study on the Relationship Between Large-Scale Turbulence Vortices and Unsteady Cavitation Around a Hydrofoil
(The American Society of Mechanical Engineers (ASME), 2/1/2023 1)We conducted a large eddy simulation (LES) of cavitating turbulent flow around a Clark-Y11.7% hydrofoil at an angle of attack of 8 deg. We focused on the improvement of the reproducibility of hydrofoil performance under ... -
Numerical and Experimental Investigation of Streamlines for Tandem Impeller in a Centrifugal Pump
(The American Society of Mechanical Engineers (ASME), 1/13/2023 )Radial fluid machines with conventional impeller often lead to flow separation in the blade passage in case of high flow deflection. Tandem blades can be used to counteract this problem. Due to their properties, a new thin ... -
Flow State at Impeller Inlet: Optimization of Conical Frustum Section of Elbow Inlet Conduit in Large Low-Lift Pump Station
(The American Society of Mechanical Engineers (ASME), 1/4/2023 1)In large low-lift pump stations, the pump assembly comprises an inlet conduit, a pump, and an outlet conduit. A short conical frustum section that connects the elbow section with the impeller inlet directly affects the ... -
Computational Fluid Dynamics Modeling of Gaseous Cavitation in Lubricating Vane Pumps: On Metering Grooves for Pressure Ripple Optimization
(The American Society of Mechanical Engineers (ASME), 12/21/2022)This paper addresses the topic of balanced vane pump simulations for pressure ripple optimization by means of metering grooves at the leading edge of delivery ports. It presents a computational fluid dynamics case study ... -
Numerical and Theoretical Investigation of the Gap Flow in Centrifugal Fans for Design and Off-Design Conditions
(The American Society of Mechanical Engineers (ASME), 12/21/2022)Industrial turbomachines, such as fans and blowers for drying, venting, cooling or conveying tasks, are often used in industrial applications and frequently are large energy consumers. Thus, there is a need for further ... -
Erratum: “Symmetric and Asymmetric Disturbances in the Rayleigh Zone of an Air-Assisted Liquid Sheet: Theoretical and Experimental Analysis,” ASME J. Fluid Eng., 2020, 142(7), p. 071302, DOI: 10.1115/1.4045998
(The American Society of Mechanical Engineers (ASME), 11/23/2022)An error occurs on Page 071302–3. The independent variable associated with the derivative of Ø1and Ø2 in Eqs. (6) and (7) is not described correctly.The right expressions for Eqs. (6) and (7) are (6)−(U1+∂Ø1∂x)∂η∂x+∂Ø1∂z ... -
Cavitation Modeling Using Lumped Parameter Approach Accounting for Bubble Dynamics and Mass Transport Through the Bubble Interface
(The American Society of Mechanical Engineers (ASME), 2023)Vaporous and gaseous cavitation cause several physical phenomena which are typically undesirable, such as reduction in compressibility and material damage. Therefore, the ability to capture these effects in simulation is ... -
Experimental Study of Turbulent Wake Flow Around Trapezoidal Cylinders With Varying Streamwise Aspect Ratios
(The American Society of Mechanical Engineers (ASME), 2023)The effects of streamwise aspect ratio (AR) on the asymmetric wake flow over and behind right-angled trapezoidal cylinders with AR (= upper cylinder length to height ratio) = 1, 2, 3, 4, and 5 were investigated using ... -
Numerical and Experimental Analysis of the Cold Flow Physics of a Nonpremixed Industrial Gas Burner
(The American Society of Mechanical Engineers (ASME), 2023)The flow field of a nonpremixed industrial gas burner is analyzed with Reynolds-averaged Navier–Stokes computational fluid dynamics validated against velocity and pressure measurements. Combustion is not modeled because ... -
Unsteady Simulation and Analysis of Energy Loss Mechanism of a Vertical Volute Pump Under Stall Conditions
(The American Society of Mechanical Engineers (ASME), 2023)This study comprehensively investigates the flow features and energy loss mechanisms under stall conditions based on computational fluid dynamics (CFD) and hydraulic loss visualization techniques. The three-dimensional ... -
Boundary Layer Investigations for Primarily Axial Flow Over a Stationary and Transversely Oscillating Cylinder
(The American Society of Mechanical Engineers (ASME), 2023)Boundary layer information local to three longitudinal positions has been characterized for a 122 cm long acrylic cylinder with hemispherical endcaps, via analysis of stereo particle image velocimetry (PIV) measurements ... -
Flow Control Around a Cylinder With a Perforated Cylinder
(The American Society of Mechanical Engineers (ASME), 2023)In this work, periodic vortex shedding at both sides of a circular cylinder is aimed to be suppressed using a concentrically located perforated cylinder under laminar flow conditions at Re = 200. A code is developed in ... -
Experimental Study on Gas–Liquid Performance and Prediction of Shaft Power and Efficiency by Dimensionless Coefficients in a Multistage Electrical Submersible Pump
(The American Society of Mechanical Engineers (ASME), 2023)Electrical submersible pumps (ESPs) widely used in oil-gas artificial lift consume a lot of electric energy in long-term operation. This paper mainly focuses on the gas–liquid performance and predicting shaft power and ... -
Workflow Comparison for Combined 4D MRI/CFD Patient-Specific Cardiovascular Flow Simulations of the Thoracic Aorta
(The American Society of Mechanical Engineers (ASME), 2023)Computational fluid dynamics (CFD) has been widely used to predict and understand cardiovascular flows. However, the accuracy of CFD predictions depends on faithful reconstruction of patient vascular anatomy and accurate ... -
Modeling and Analysis of the Leading-Edge Vortex on Flapping Foil Turbines in Swing-Arm Mode
(The American Society of Mechanical Engineers (ASME), 2023)Hydrokinetic flapping foil turbines in swing-arm mode have gained considerable interest in recent years because of their enhanced capability to extract power, and improved efficiency compared to foils in simple mode. The ... -
Geometric Characteristics of Flapping Foils for Enhanced Propulsive Efficiency
(The American Society of Mechanical Engineers (ASME), 2023)The shape of a foil undergoing a combined pitching heaving motion is critical to its design in applications that demand high efficiency and thrust. This study focuses on understanding of how the shape of a foil affects its ... -
Data-Driven Dynamical System Models of Roughness-Induced Secondary Flows in Thermally Stratified Turbulent Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2023)The goal of this work is to investigate the feasibility of constructing data-driven dynamical system models of roughness-induced secondary flows in thermally stratified turbulent boundary layers. Considering the case of a ...