Journal of Fluids Engineering: Recent submissions
Now showing items 2101-2120 of 9024
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Cavitation Phenomena and Performance Implications in Archimedes Flow Turbines
(The American Society of Mechanical Engineers (ASME), 2016)Cavitation produces undesirable effects within turbines, such as noise, decreases in efficiency, and structural degradation of the device. Two microhydro turbines incorporating Archimedean spiral blade geometries were ... -
On the Numerical Solution of Two-Dimensional, Laminar Compressible Flows With Imbedded Shock Waves
(The American Society of Mechanical Engineers (ASME), 1972)The complete, time-dependent Navier-Stokes equations are expressed in conservation form and solved by employing an explicit finite difference numerical technique which incorporates artificial viscosity ... -
On the Propagation and Attenuation of Turbulent Fluid Transients in Circular Pipes
(The American Society of Mechanical Engineers (ASME), 2016)The attenuation of turbulent fluid transients in pipes is numerically investigated in the present study using onedimensional (1D) and twodimensional (2D) water hammer models. The method of characteristics (MOC) is used for ... -
Experimental Investigation of the Evolution and Head On Collision of Elliptic Vortex Rings
(The American Society of Mechanical Engineers (ASME), 2016)The headon collision process of elliptic vortex rings was experimentally investigated using flowvisualization technique as well as particle image velocimetry (PIV). Elliptic vortex rings were generated by the movement of ... -
Adjoint Based Aerodynamic Shape Optimization for Low Reynolds Number Airfoils
(The American Society of Mechanical Engineers (ASME), 2016)In the past decades, most of the research studies on airfoil shape design and optimization were focused on high Reynolds number airfoils. However, low Reynolds number airfoils have attracted significant attention nowadays ... -
Numerical and Experimental Investigation of Aerodynamic Performance for a Straight Turbine Cascade With a Novel Partial Shroud
(The American Society of Mechanical Engineers (ASME), 2016)A comparative experimental and numerical analysis is carried out to assess the aerodynamic performance of a novel partial shroud in a straight turbine cascade. This partial shroud is designed as a combination of winglet ... -
Aerodynamic Effects of Unvented Hoods on the Initial Compression Wave Generated by a High Speed Train Entering a Tunnel
(The American Society of Mechanical Engineers (ASME), 2016)The influence of unvented hood on the initial compression wave generated by a highspeed train entering a tunnel is investigated using computational fluid dynamics. Comparisons with experimental data are first carried out ... -
Parameters Affecting Bubble Formation and Size Distribution From Porous Media
(The American Society of Mechanical Engineers (ASME), 2016)This paper describes the experiments designed to control bubble size during gas injection through porous media into liquid cross flow. A parametric study examined the effect of control variables on average bubble size and ... -
Electroosmotic Flow in Hydrophobic Microchannels of General Cross Section
(The American Society of Mechanical Engineers (ASME), 2016)Adopting the Navier slip conditions, we analyze the fully developed electroosmotic flow in hydrophobic microducts of general cross section under the Debye–Hأ¼ckel approximation. The method of analysis includes series ... -
Assessment of Drag Models for Geldart A Particles in Bubbling Fluidized Beds
(The American Society of Mechanical Engineers (ASME), 2016)In order to accurately predict the hydrodynamic behavior of gas and solid phases using an Eulerian–Eulerian approach, it is crucial to use appropriate drag models to capture the correct physics. In this study, the ... -
Inflow Turbulence Generation for Eddy Resolving Simulations of Turbomachinery Flows
(The American Society of Mechanical Engineers (ASME), 2016)A simple variant of recycling and rescaling method to generate inflow turbulence using unstructured grid computational fluid dynamics (CFD) codes is presented. The method has been validated on large eddy simulation (LES) ... -
Global Linear Instability of Flow Through a Converging–Diverging Channel
(The American Society of Mechanical Engineers (ASME), 2016)The global linear stability, where we assume no homogeneity in either of the spatial directions, of a twodimensional laminar base flow through a spatially periodic converging–diverging channel is studied at low Reynolds ... -
A Computational Fluid Dynamics Study on the Gas Mixing Capabilities of a Multiple Inlet System
(The American Society of Mechanical Engineers (ASME), 2016)The mixing behavior of three gas streams was investigated numerically by computational fluid dynamics (CFD) for 16 different geometries to gain insight for the construction of soot measuring systems. The overall goal was ... -
Equipment for the Experimental Determination of Thermal Properties of Fluids at Elevated Pressures
(The American Society of Mechanical Engineers (ASME), 1972)The available methods for determining the thermal properties of compressible fluids by flow calorimetry are reviewed and an analysis is given for the method of determining heat capacity ratios ... -
Experimental and Numerical Investigation of Shock Wave Attenuation by Dynamic Barriers
(The American Society of Mechanical Engineers (ASME), 2016)An explosion at the entrance of an underground bunker and a suicide bomber inside an airplane are examples of scenarios in which blast waves propagate in tunnels and corridortype structures. The need to attenuate the ... -
Analysis of the Unstable Behavior of a Pump Turbine in Turbine Mode: Fluid Dynamical and Spectral Characterization of the S shape Characteristic
(The American Society of Mechanical Engineers (ASME), 2016)The most common mechanical equipment adopted in the new generation of pumpedhydro power plants is represented by reversible pumpturbines (RPT), required to rapidly switch between pumping and generating modes in order to ... -
An Experimental Investigation on the Characteristics of Turbulent Boundary Layer Flows Over a Dimpled Surface
(The American Society of Mechanical Engineers (ASME), 2016)An experimental investigation was conducted to quantify the characteristics of the turbulent boundary layer flows over a dimpled surface in comparison to those over a conventional flat plate. In addition to measuring surface ... -
Influence of Changing Casing Groove Parameters on the Performance of Centrifugal Compressors Near Stall Condition
(The American Society of Mechanical Engineers (ASME), 2016)The casing treatment is an effective method for increasing the stall margin of compressors and enhancing the flow distribution at the blades tip. The present numerical study focuses on making an optimization of the casing ... -
Numerical Simulation of Vortex Induced Vibration of Two Rigidly Connected Cylinders in Side by Side and Tandem Arrangements Using RANS Model
(The American Society of Mechanical Engineers (ASME), 2016)Vortexinduced vibration (VIV) of two rigidly connected circular cylinders in sidebyside and tandem arrangements in the crossflow direction was investigated using twodimensional (2D) numerical simulations. The 2D ReynoldsAveraged ... -
Turbulent Flows Over Forward Facing Steps With Surface Roughness
(The American Society of Mechanical Engineers (ASME), 2016)This paper reports an investigation of the effects of surface conditions of forwardfacing steps (FFS) on turbulent flows. Three surface conditions including one smooth step and two rough step surfaces created using sandpapers ...