نتایج جستجو برای: potential flow

تعداد نتایج: 1508712  

2014
PAUL SPENCE OLEG A. SAENKO MATTHEW H. ENGLAND

This study uses a global ocean eddy-permitting climate model to explore the export of abyssal water from the Southern Ocean and its sensitivity to projected twenty-first-century poleward-intensifying Southern Oceanwind stress. The abyssal flow pathways and transport are investigated using a combination of Lagrangian and Eulerian techniques. In an Eulerian format, the equatorand poleward flows w...

2003
D. D. JOSEPH D. D. Joseph

Potential flows u = ∇φ are solutions of the Navier–Stokes equations for viscous incompressible fluids for which the vorticity is identically zero. The viscous term μ∇u = μ∇∇φ vanishes, but the viscous contribution to the stress in an incompressible fluid (Stokes 1850) does not vanish in general. Here, we show how the viscosity of a viscous fluid in potential flow away from the boundary layers e...

2013
Aaron Luttman Erik M. Bollt Ranil Basnayake Sean Kramer Nicholas B. Tufillaro

Given image data of a fluid flow, the flow field, 〈u, v〉, governing the evolution of the system can be estimated using a variational approach to optical flow. Assuming that the flow field governing the advection is the symplectic gradient of a stream function or the gradient of a potential function – both falling under the category of a potential flow – it is natural to re-frame the optical flo...

Journal: :علوم کاربردی و محاسباتی در مکانیک 0
محمدمهدی افسری سید علی میربزرگی حمید نیازمند

in this paper, numerical investigation of a flat passive micromixer with heterogeneous surface properties that the flow through it, is driven by the electroosmotic flow have been presented. the governing equations, which consist of a laplace equation for the distribution of external electric potential, a poisson equation for the distribution of electric double layer potential, modified navier-s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1391

in this research we have studied the effect of some transition-metals (cu, ag and au) substitutions on two-electron reduction potential of flavins by application of dft method. all geometries have been optimized at blyp level of theory and “6-31+g** + lanl2dz” mixed basis set. the frequency job at the same method and basis sets has been performed to obtain gibbs free energy of compounds. it h...

ژورنال: مهندسی دریا 2010
بصیرت تبریزی, حسن, حسنقلی زاده, محسن, عصاری, محمدرضا,

The estimation of wave loads on very large flouting structure is usually done by an empirical or a computational approach. The computational approach usually assumes two types. Some use the Laplace equation or potential flow and some take the Navier-Stokes equation or viscous flow analysis. In this study, the interaction between wave and elastic plate is investigated by using viscous flow assum...

2016
Daniil A. Andrienko Iain D. Boyd

Recent progress in state-resolved kinetic models of thermal relaxation and dissociation of oxygen based on highfidelity transition rate coefficients is presented. Specifically, three types of collisions encountered in high-temperature flows are discussed: O2–O, O2–N, and O2–N2. For these molecular systems, the thermal relaxation times and dissociation rate coefficients, obtained from extensive ...

Journal: :Physical review. E, Statistical, nonlinear, and soft matter physics 2005
Victor S L'vov Anna Pomyalov Itamar Procaccia Vasil Tiberkevich

The interaction of polymers with turbulent shear flows is examined. We focus on the structure of the elastic stress tensor, which is proportional to the polymer conformation tensor. We examine this object in turbulent flows of increasing complexity. First is isotropic turbulence, then anisotropic (but homogenous) shear turbulence, and finally wall bounded turbulence. The main result of this pap...

2015
Ahmed M Mahmoud Arthur R Davoyan Nader Engheta

One-way propagation of light, analogous to the directional flow of electrons in the presence of electric potential difference, has been an important goal in the wave-matter interaction. Breaking time-reversal symmetry in photonic flows is faced with challenges different from those for electron flows. In recent years several approaches and methods have been offered towards achieving this goal. H...

2008
WILLIAM H. WARREN

Behavior is organized into stable action modes with qualitative transitions between them. An ecological approach attempts to account for these patterns in terms of physical and informational constraints, such as attractors in the underlying dynamics of action and perceptual information specific to them. Perception and action are coupled by laws of control that relate informational variables to ...

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