Abstract: The evolution of a circular vortex ring with a density 1.5 times of the ambient fluid under gravity was investigated. Three distinct patterns, namely, laminar, wavy, and turbulent, were observed. ...

Abstract: Turbulent flows, from simple to complex, are predicted using various turbulence models. Free shear flows; wall shear flows, with and without separation; and more complex flows such as flow past an axisymmetric body or flow ...

Abstract: An overview of the second-order closure turbulence models is presented in this paper. Models studied include the

Abstract: To introduce the intermittency effects of the energy cascade process into turbulence modeling, a new fractal turbulence scale based on

Abstract: In this paper, a numerical simulation of steady laminar and turbulent flow in a twodimensional model for the total artificial heart is presented. A trileaflet polyurethane valve was simulated ...

Abstract: A B‐spline bracing element of arbitrary orientation is developed and combined with the B‐spline compound strip method (BCSM) to analyze structures having bracing members. In the BCSM, a problem is first partially discretized ...

Abstract: Steady turbulent flow past a disc‐type valve in an axisymmetric tube is investigated numerically. The flow is assumed to be axisymmetric without swirl and possesses constant material properties. The finite‐analytic numerical ...

Abstract: An investigation is performed to study the effect of the disc position and thickness on the characteristics of turbulent flow past the disc valve. The governing equations with a

Abstract: The unsteady flow past a disc‐type valve in an axisymmetric tube has been calculated numerically from the governing Navier‐Stokes equations. The flow is assumed to be laminar and incompressible, and the fluid possesses ...

Abstract: It has been known that it is difficult to establish a fuzzy logic model with effective fuzzy rules and the associated membership functions. Neural network with its learning capability has been ...