Journal of Fluids Engineering: Recent submissions
Now showing items 2441-2460 of 9024
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Reduced Order Modeling of Low Mach Number Unsteady Microchannel Flows
(The American Society of Mechanical Engineers (ASME), 2014)We present reducedorder models of unsteady lowMachnumber ideal gas flows in twodimensional rectangular microchannels subject to firstorder slipboundary conditions. The pressure and density are related by a polytropic ... -
Assessment of Cavitation Erosion With a URANS Method
(The American Society of Mechanical Engineers (ASME), 2014)An assessment of the cavitation erosion risk by using a contemporary unsteady Reynoldsaveraged Navier–Stokes (URANS) method in conjunction with a newly developed postprocessing procedure is made for an NACA0015 hydrofoil ... -
Application of Womersley Model to Reconstruct Pulsatile Flow From Doppler Ultrasound Measurements
(The American Society of Mechanical Engineers (ASME), 2014)A Womersley modelbased assessment of pulsatile rigidtube flow is presented. Multigate Doppler ultrasound was used to measure axial velocities at many radial locations along a single interrogation beam going through the ... -
Cavitation Characteristics of S Blade Used in Fully Reversible Pump Turbine
(The American Society of Mechanical Engineers (ASME), 2014)Sshaped blade profiles with double camber find use in fully reversible turbomachines that can extract power from tides. Though noncavitating characteristics of Sblades were determined in the past, yet characterizing ... -
Experimental and Numerical Determination of Interface Slip Coefficient of Fluid Stream Exiting a Partially Filled Porous Medium Channel
(The American Society of Mechanical Engineers (ASME), 2014)Stacks of parallel plates modeled as a standard fissuretype anisotropic porous medium are filled inside a rectangular channel up to half the cross section height. The interface slip coefficient خ± for the isothermal laminar ... -
Water Level Rise Upstream a Permeable Barrier in Subcritical Flow: Experiment and Modeling
(The American Society of Mechanical Engineers (ASME), 2014)This work addresses the dependence of water depth upstream a permeable barrier, h1, with discharge per unit channel width, Q/W, in subcritical flow regime. The barrier, that extends over the entire width of the channel, ... -
Adaptive Mesh Refinement for Immersed Boundary Methods
(The American Society of Mechanical Engineers (ASME), 2014)Immersed boundary methods coupled with adaptive mesh refinement (AMR) are a powerful tool to solve complex viscous incompressible flow problems, especially in the presence of moving and deforming boundaries. Immersed ... -
A Eulerian Method for Water Droplet Impingement by Means of an Immersed Boundary Technique
(The American Society of Mechanical Engineers (ASME), 2014)The estimation of water droplet impingement is the first step toward a complete ice accretion assessment. Numerical approaches are usually implied to support the experimental testing and to provide fast responses when ... -
A Sharp Interface Direct Forcing Immersed Boundary Approach for Fully Resolved Simulations of Particulate Flows
(The American Society of Mechanical Engineers (ASME), 2014)In recent years, the immersed boundary method has been well received as an effective approach for the fully resolved simulations of particulate flows. Most immersed boundary approaches for numerical studies of particulate ... -
Flows Through Reconstructed Porous Media Using Immersed Boundary Methods
(The American Society of Mechanical Engineers (ASME), 2014)Understanding flow through real porous media is of considerable importance given their significance in a wide range of applications. Direct numerical simulations of such flows are very useful in their fundamental understanding. ... -
Computation of Flow Through a Three Dimensional Periodic Array of Porous Structures by a Parallel Immersed Boundary Method
(The American Society of Mechanical Engineers (ASME), 2014)A parallel implementation of an immersedboundary (IB) method is presented for low Reynolds number flow simulations in a representative elementary volume (REV) of porous media that are composed of a periodic array of regularly ... -
Coupling of One Dimensional and Two Dimensional Hydrodynamic Models Using an Immersed Boundary Method
(The American Society of Mechanical Engineers (ASME), 2014)Numerical simulations of flooding events through rivers and channels require coupling between onedimensional (1D) and twodimensional (2D) hydrodynamic models. The rivers and channels are relatively narrow, and the widths ... -
Simulations of High Reynolds Number Air Flow Over the NACA 0012 Airfoil Using the Immersed Boundary Method
(The American Society of Mechanical Engineers (ASME), 2014)The immersedboundary method is coupled to an incompressibleflow Reynoldsaveraged Navier Stokes solver, based on a twoequation turbulence model, to perform unsteady numerical simulations of airflow past the NACA0012 airfoil ... -
Special Section on Development and Applications of Immersed Boundary Methods
(The American Society of Mechanical Engineers (ASME), 2014)Over the past decade, immersed boundary methods have been constantly expanding into new areas of fluid dynamics and related disciplines. A common feature of most computational tools based on immersed boundary methods is ... -
An Improved Direct Forcing Immersed Boundary Method for Fluid Structure Interaction Simulations1
(The American Society of Mechanical Engineers (ASME), 2014)In the present work, we present an improved version of the directforcing immersed boundary (IB) method proposed in Wang and Zhang (2011, “An Immersed Boundary Method Based on Discrete Stream Function Formulation for ... -
Flows Through Real Porous Media: X Ray Computed Tomography, Experiments, and Numerical Simulations
(The American Society of Mechanical Engineers (ASME), 2014)Two different directforcing immersed boundary methods (IBMs) were applied for the purpose of simulating slow flow through a real porous medium: the volume penalization IBM and the stress IBM. The porous medium was a random ... -
Mass Fraction Measurements in Controlled Oil Water Flows Using Noninvasive Ultrasonic Sensors
(The American Society of Mechanical Engineers (ASME), 2014)Controlled flow rate tests using mixtures of crude oil and water at different mass fractions were carried out in a flow loop at the University of Tulsa. A noninvasive acoustic method developed at the Los Alamos National ... -
An Improved Model for the Return to Isotropy of Homogeneous Turbulence
(The American Society of Mechanical Engineers (ASME), 2014)In CFD modeling, the most widely used Reynolds stress models is the Speziale, Sarkar, Gatski (SSG) model. The present formulation, though similar in structure to the SSG model, is a mathematical variation assuming homogeneity ... -
Implementation of Two Fluid Model for Dilute Gas Solid Flow in Pipes With Rough Walls
(The American Society of Mechanical Engineers (ASME), 2014)A numerical study was carried out to investigate the performance of a twolayer model for predicting turbulent gasparticle flows in rough pipes. An Eulerian–Eulerian twofluid formulation was used to model both the gas and ... -
Centrifugal Pump Derating for Non Newtonian Slurries
(The American Society of Mechanical Engineers (ASME), 2014)The Hydraulic Institute method, developed for predicting centrifugal pump performance of viscous Newtonian fluids, is used by some for nonNewtonian fluids. This requires an average value of viscosity representing the ...