Journal of Fluids Engineering: Recent submissions
Now showing items 2281-2300 of 9024
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Numerical Analysis of Laminar Drag Reducing Grooves
(The American Society of Mechanical Engineers (ASME), 2015)The performance of grooves capable of reducing shear drag in laminar channel flow driven by a pressure gradient has been analyzed numerically. Only grooves with shapes that are easy to manufacture have been considered. ... -
Postswirl Maneuvering Propulsor
(The American Society of Mechanical Engineers (ASME), 2015)This research examines the novel use of a postswirl propulsor to generate side forces sufficient for undersea vehicle control. Numerical simulations using the commercial computational fluid dynamics (CFD) code Fluentآ® ... -
Three Dimensional Numerical Simulation of an External Gear Pump With Decompression Slot and Meshing Contact Point
(The American Society of Mechanical Engineers (ASME), 2015)Recently several works have been published on numerical simulation of an external gear pump (EGP). Such kinds of pumps are simple and relatively inexpensive, and are frequently used in fluid power applications, such as ... -
Discussions: (1) “On the Axisymmetric Turbulent Boundary Layer Growth Along Long Thin Circular Cylinders,†(Jordan, S. A., 2014, ASME J. Fluids Eng., 136(5), p. 051202) and (2) “Understanding Tow Tank Measurements of Total Drag for Long Thin Circular Cylinders,†(Jordan, S. A., 2014, ASME J. Fluids Eng., 136(3), p. 031205)
(The American Society of Mechanical Engineers (ASME), 2015)In a recent paper, work of Jordan [1] has pointed out that “measurements of Lueptow et al. [2] did not confirm the empirical expression خ´/a=0.45(x/a)0.746 proposed by Afzal and Singh [3], but however supports the general ... -
On the Fluidic Response of Structures in Hypervelocity Impacts
(The American Society of Mechanical Engineers (ASME), 2015)In a hypervelocity impact (HVI) event, the shock pressures exceed the strength of common aerospace materials, and brief shockinduced temperature rises cause melting and vaporization of most structural bodies. Under these ... -
A Dimensionless Scaling Parameter for Thermal Effects on Cavitation in Turbopump Inducers
(The American Society of Mechanical Engineers (ASME), 2015)To characterize cryogenic pump performance, at least one parameter in addition to flow coefficient and cavitation number is required. This parameter arises because the heat of vaporization and other physical parameters ... -
Turbulent Drag Reduction by Biopolymers in Large Scale Pipes
(The American Society of Mechanical Engineers (ASME), 2015)In this work, we describe drag reduction experiments performed in a large diameter pipe (i.d. 100 mm) using a semirigid biopolymer Xanthan Gum (XG). The objective is to build a selfconsistent data base which can be used ... -
Experimental Study of the Type VI Stilling Basin Performance
(The American Society of Mechanical Engineers (ASME), 2015)Understanding the estuarine turbulent flow from dams, channels, and pipes, as well as the river flow are very important due to the potential to cause damage to the bed of the river or channel and cause scouring of structures ... -
Large Eddy Simulation of the Mixing of a Passive Scalar in a High Schmidt Turbulent Jet
(The American Society of Mechanical Engineers (ASME), 2015)Accurate subgridscale (SGS) scalar flux models are essential when large eddy simulation (LES) is used to represent flow, mixing and transport of passive and active scalars in engineering, and environmental applications in ... -
Sensitization of a Transition Sensitive Linear Eddy Viscosity Model to Rotation and Curvature Effects
(The American Society of Mechanical Engineers (ASME), 2015)A new scalar eddyviscosity turbulence model is proposed, designed to exhibit physically correct responses to flow transition, streamline curvature, and system rotation effects. The eddyviscosity model (EVM) developed herein ... -
The Role of Contact Line (Pinning) Forces on Bubble Blockage in Microchannels
(The American Society of Mechanical Engineers (ASME), 2015)This paper highlights the influence of contact line (pinning) forces on the mobility of dry bubbles in microchannels. Bubbles moving at velocities less than the dewetting velocity of liquid on the surface are essentially ... -
Numerical and Experimental Study of Bubble Impact on a Solid Wall
(The American Society of Mechanical Engineers (ASME), 2015)The dynamic characteristics of a bubble initially very close to a rigid wall, or with a very narrow gap, are different from those of a bubble away from the wall. Especially at the contraction stage, a highspeed jet pointing ... -
High Order Solution of Viscoelastic Fluids Using the Discontinuous Galerkin Method
(The American Society of Mechanical Engineers (ASME), 2015)In this paper, the highorder solution of a viscoelastic fluid is investigated using the discontinuous Galerkin (DG) method. The OldroydB model is used to describe the viscoelastic behavior of the fluid flow. The highorder ... -
Lattice Boltzmann Simulation of the Flow Field in Pump Intakes—A New Approach
(The American Society of Mechanical Engineers (ASME), 2015)In recent years, lattice Boltzmann methods (LBMs) have become popular for solving fluid flow problems of engineering interest. Reasons for this popularity are due to the advantages of this method, which are, for example, ... -
Numerical Simulation of Flow Past an Elliptical Cylinder Undergoing Rotationally Oscillating Motion
(The American Society of Mechanical Engineers (ASME), 2015)The finite element method is used to simulate the nearwake of an elliptical cylinder undergoing rotationally oscillating motion at low Reynolds number, 50 ≤ Re ≤ 150. Reynolds number is based on equivalent ... -
Effect of Radial Temperature Gradient on the Stability of Magnetohydrodynamic Dean Flow in an Annular Channel at High Magnetic Parameter
(The American Society of Mechanical Engineers (ASME), 2015)The effect of a radial temperature gradient on the stability of Dean flow of an electrically conducting fluid in an annular channel is investigated. A strong constant magnetic field is imposed in the axial direction. ... -
Joint Numerical–Experimental Investigation of Enhanced Chemical Reactivity in Microfibrous Materials for Desulfurization
(The American Society of Mechanical Engineers (ASME), 2015)Ultrapure hydrogen is very much required for a healthy operation of proton exchange membrane (PEM) fuel cells. The concentration of sulfur in the fuel is an important controlling factor because it leads to pollution via ... -
Characterization of the Behavior of Confined Laminar Round Jets
(The American Society of Mechanical Engineers (ASME), 2015)In this work, the Navier–Stokes equations are solved for a laminar, round jet in a large confinement. The flow is characterized as a function of the enclosuretojet diameter ratio, in the range 40–100, and the Reynolds ... -
Numerical Evaluation of Unsteadiness in Particle Dispersion Modeling
(The American Society of Mechanical Engineers (ASME), 2015)The paper deals with the issues of stochastic dispersion models for the inertial particle turbulent flow. Thereby, dispersion models are applied to generate the instantaneous velocity of the fluid at particle location to ... -
Oval Flow Mode Between Two Corotating Disks With Stationary Shroud
(The American Society of Mechanical Engineers (ASME), 2015)The characteristic flow behavior, timeaveraged velocity distributions, phaseresolved ensembleaveraged velocity profiles, and turbulence properties of the flow in the interdisk midplane between shrouded two corotating disks ...