Journal of Fluids Engineering: Recent submissions
Now showing items 661-680 of 9024
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Experimental and Model Studies of Various Size Water Droplet Impacting on a Hydrophobic Surface
(The American Society of Mechanical Engineers (ASME), 2021)Impacting droplet on a hydrophobic surface is investigated and droplet size effect on impacting properties is examined. Liquid pressure variation inside droplet is numerically simulated in the impacting and rebounding ... -
Two-Dimensional Numerical Analysis of Non-Darcy Flow Using the Lattice Boltzmann Method: Pore-Scale Heterogeneous Effects
(The American Society of Mechanical Engineers (ASME), 2021)This study simulates pore-scale two-dimensional flows through porous media composed of circular grains with varied pore-scale heterogeneity to analyze non-Darcy flow effects on different types of porous media using the ... -
Experimental Measurements of the Wake of a Sphere at Subcritical Reynolds Numbers
(The American Society of Mechanical Engineers (ASME), 2021)This work experimentally investigated the flow phenomena and vortex structures in the wake of a sphere located in a water loop at Reynolds numbers of Re = 850, 1,250, and 1,700. Velocity fields in the wake region were ... -
Investigation of the Matching Relation Between Impeller and Flow Channel of Regenerative Flow Pumps
(The American Society of Mechanical Engineers (ASME), 2021)As a specific radial flow pump, the regenerative flow pump (RFP) usually has a low efficiency. In this study, in order to explore the matching mechanism, three cases with various matching relations were investigated by the ... -
Analysis on the Inception of the Magnetohydrodynamic Flow Instability in the Annular Linear Induction Pump Channel
(The American Society of Mechanical Engineers (ASME), 2021)Flow instability is the intricate phenomenon in the annular linear induction pump (ALIP) when the pump runs at off-design working condition. A three-dimensional (3D) numerical model is built to simulate the flow in the ... -
Influence of Blade Tip Surface Roughness on the Performance of a Single-Stage Axial Flow Compressor
(The American Society of Mechanical Engineers (ASME), 2021)Numerical investigations are carried out in a single-stage subsonic axial flow compressor to unravel the influence of blade tip surface roughness on the tip leakage flow characteristics and hence the compressor performance. ... -
Unsteady Hemodynamics in Intracranial Aneurysms With Varying Dome Orientations
(The American Society of Mechanical Engineers (ASME), 2021)Fluid loading within an intracranial aneurysm is difficult to measure but can be related to the shape of the flow passage. The outcome of excessive loading is a fatal hemorrhage, making it necessary for early diagnosis. ... -
On the Pressure Losses Through Multistage Perforated Plates
(The American Society of Mechanical Engineers (ASME), 2021)Perforated plates are commonly used for flow control in pressurized systems. In different industrial applications, these devices are also used in series (multistage perforated plates) to manage high pressure drop or reduce ... -
Investigation of Flow Separation Characteristics in a Pump as Turbines Impeller Under the Best Efficiency Point Condition
(The American Society of Mechanical Engineers (ASME), 2021)The impeller, which is the main energy conversion component of a pump as turbine (PAT), is designed for pumping mode, and its internal flow characteristics are quite complicated even at the best efficiency point (BEP) of ... -
Pressure Losses at Moderate Reynolds Numbers in Diamond-Shaped Cylinders Arrays: Application to Microregenerators
(The American Society of Mechanical Engineers (ASME), 2021)Cylinders with an elliptical, oblong, lenticular, sinus, or diamond transveral shape are very interesting geometries for the design of compact heat exchangers. This work investigates the role of the porosity and of the ... -
Influence of Tip Clearance on the Hydrodynamic Damping Characteristics of a Hydrofoil
(The American Society of Mechanical Engineers (ASME), 2021)Tip clearance in hydraulic machines may complicate the fluid–structure interaction (FSI) effects. In this investigation, a mode-based approach (modal work) is evaluated and employed to quantitatively predict the added mass, ... -
On the Vortical Characteristics of Horn-Like Vortices in Stator Corner Separation Flow in an Axial Flow Pump
(The American Society of Mechanical Engineers (ASME), 2021)The phenomenon of horn-like vortex in stator corner separation flow in an axial flow pump was first reported by Wang et al. (2020, “Investigation on the Horn-Like Vortices in Stator Corner Separation Flow in an Axial Flow ... -
Simulation and Experimental Investigation of a New Type of Combined Seal Structure
(The American Society of Mechanical Engineers (ASME), 2021)Based on the study of leakage characteristics of labyrinth seal structure (LSS), a new type of combined seal structure (CSS) consisting of the labyrinth structure and the nozzle structure has been proposed. The sealing ... -
A Preliminary Study on the Simulation of Vortex Flow in Pump Intake Based on LBM-VOF-LES Combined Model
(The American Society of Mechanical Engineers (ASME), 2021)In this paper, the lattice Boltzmann method-large eddy simulation (LBM-LES) model was combined with the volume of fluid (VOF) method and used to simulate vortex flow in a typical pump intake. The strain rate tensor in the ... -
Numerical Calibration of Three-Dimensional Printed Five-Hole Probes for the Transonic Flow Regime
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents a method for a cost- and time-effective calibration procedure for five-hole probes for the transonic flow regime based on additive manufacturing and a numerical calibration routine. The computational ... -
Optimal Estimation of the Roughness Coefficient and Friction Factor of a Pipeline
(The American Society of Mechanical Engineers (ASME), 2021)This work addresses the estimation of two interrelated parameters of the fluid flow in pipes. First, a numerical and experimental evaluation of some proposed methods to compute the friction factor in turbulent regime is ... -
Computational Simulation of Spontaneous Liquid Penetration and Depression Between Vertical Parallel Plates
(The American Society of Mechanical Engineers (ASME), 2021)A computational fluid dynamics model is developed to study the dynamics of meniscus formation and capillary flow between vertical parallel plates. An arbitrary Lagrangian–Eulerian approach is employed to predict and ... -
Excitation of Shear Layer Due to Surface Roughness Near the Leading Edge: An Experiment
(The American Society of Mechanical Engineers (ASME), 2021)In this paper, a comprehensive study has been performed to address the excitation of a separated boundary layer near the leading edge due to surface roughness. Experiments are performed on a model airfoil with the semicircular ... -
Propagation of Shock Wave at the Cavitation Bubble Expansion Stage Induced by a Nanosecond Laser Pulse
(The American Society of Mechanical Engineers (ASME), 2021)The objective of this paper is to reveal the attenuation characteristics of a shock wave after optical breakdown in water, with laser pulses of 12-ns duration. A high time-resolved shadowgraph method is applied to capture ... -
Large Eddy Simulation of Microvortex Generators in a Turbulent Boundary Layer
(The American Society of Mechanical Engineers (ASME), 2021)This study investigates the flow physics on microvortex generators (MVGs) in order to improve their performance in turbulent boundary layers (TBLs). TBLs can be a challenging environment for MVGs because of the streamwise ...