نتایج جستجو برای: velocity divergence
تعداد نتایج: 187274 فیلتر نتایج به سال:
This paper presents a relation between the three glacier surface velocity components, the surface flux-divergence, glacier thickness and bottom melt and displacement. The relation can be used as an extension to the surface parallel flow assumption often used with interferometric synthetic aperture measurements of glacier velocities. The assumptions for the derivation are described and important...
Srivastava and Maheshwari (Iranian Journal of Fuzzy Systems 13(1)(2016) 25-44) introduced a new divergence measure for intuitionisticfuzzy sets (IFSs). The properties of the proposed divergence measurewere studied and the efficiency of the proposed divergence measurein the context of medical diagnosis was also demonstrated. In thisnote, we point out some errors in ...
Repeat transects of full-depth density and velocity are used to quantify generation and radiation of the semidiurnal internal tide from Kaena Ridge, Hawaii. A 20-km-long transect was sampled every 3 h using expendable current profilers and the absolute velocity profiler. Phase and amplitude of the baroclinic velocity, pressure, and vertical displacement were computed, as was the energy flux. La...
For the three-dimensional incompressible Navier-Stokes equations, we present a formulation featuring velocity, vorticity and helical density as independent variables. We find the helical density can be observed as a Lagrange multiplier corresponding to the divergence-free constraint on the vorticity variable, similar to the pressure in the case of the incompressibility condition for velocity. A...
Dark matter, if it exists, accounts for five times as much the ordinary baryonic matter. Compared to hydrodynamic turbulence, flow of dark matter might possess widest presence in our universe. This paper presents a statistical theory that is compared with N-body simulations. By contrast hydrodynamics normal fluids, self-gravitating, long-range, and collisionless scale-dependent behavior. The pe...
The modelling of diffusive terms in particle methods is a delicate matter and several models were proposed in the literature to take such terms into account. The Diffusion Velocity Method (DVM), originally designed for the diffusion of passive scalars, turns diffusive terms into convective ones by expressing them as a divergence involving a so-called diffusion velocity. In this paper, DVM is ex...
Submitted for the DPP07 Meeting of The American Physical Society Velocity Field Analysis for Edge Turbulence Imaging B.T. BROWN, T. MUNSAT, Center for Integrated Plasma Studies, University of Colorado, C. HOLLAND, G. TYNAN, Dept. Mechanical and Aerospace Engineering, UCSD — Techniques for extracting time-resolved 2-D velocity maps have been developed for turbulence imaging diagnostics. A hybrid...
We develop divergence-conforming B-spline discretizations for the numerical solution of the steady Navier-Stokes equations. These discretizations are motivated by the recent theory of isogeometric discrete differential forms and may be interpreted as smooth generalizations of Raviart-Thomas elements. They are (at least) patchwise C and can be directly utilized in the Galerkin solution of steady...
where the peculiar velocity of the Local Group itself is v(0), and r̂ is the unit vector to the galaxy in question. In practice, we will measure distances in units of km s, which means that H0 ≡ 1, and the uncertainties in the value of H0 discussed by Freedman and Tammann in this volume are not an issue. Thus measurements of redshifts cz, and of redshift-independent distances via standard candle...
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