نتایج جستجو برای: stokes equation

تعداد نتایج: 253835  

Journal: :Applied Mathematics and Optimization 2002

Journal: :Progress of Theoretical Physics 1985

2008
B. Ferrario

A non linear Itô equation in a Hilbert space is studied by means of Girsanov theorem. We consider a non linearity of polynomial growth in suitable norms, including that of quadratic type which appears in the Kuramoto–Sivashinsky equation and in the Navier– Stokes equation. We prove that Girsanov theorem holds for the 1-dimensional stochastic Kuramoto–Sivashinsky equation and for a modification ...

Journal: :SIAM J. Numerical Analysis 2015
Julian Fischer

We derive a posteriori estimates for the modeling error caused by the assumption of perfect incompressibility in the incompressible NavierStokes equation: Real fluids are never perfectly incompressible, but always feature at least some low amount of compressibility. Thus, their behavior is described by the compressible Navier-Stokes equation, the pressure being a steep function of the density. ...

2009
Eduardo Corona

Last week we studied the key concepts of Finite Element Methods, in the context of solving the Laplace equation. We saw the …nite element method arise naturally as an instance of the Galerkin method, a discretization procedure for the corresponding weak formulation. Finally, we learned about error estimates, examples of elements and implementation practices. This week, our main objective is to ...

Journal: :J. Comput. Physics 2015
Daozhi Han Xiaoming Wang

We propose a novel second order in time numerical scheme for Cahn-Hilliard-NavierStokes phase field model with matched density. The scheme is based on second order convex-splitting for the Cahn-Hilliard equation and pressure-projection for the Navier-Stokes equation. We show that the scheme is mass-conservative, satisfies a modified energy law and is therefore unconditionally stable. Moreover, ...

Journal: :international journal of industrial mathematics 0
ar. ‎haghighi‎ department of mathematics, urmia university of technology, urmia, ‎iran. s. asadi ‎chalak‎ department of mathematics, urmia university of technology, urmia, ‎iran.

in the present study, the nonlinear model of non-newtonian blood flow in cosine-shape stenosed elastic artery is numerically examined. the model is carried out for axisymmetric, two-dimensional and fully developed blood flow. the vessel wall is assumed to be have time-dependent radius that is important factor for study of blood flow. the cosine-shape stenosis convert to rigid artery by using a ...

2008
J. Piest

The derivation of the Navier-Stokes equation starting from the Liouville equation using projector techniques yields a friction term which is nonlinear in the velocity. As has been explained in the 1. version of this paper, when the second-order part of the term is non-zero, this leads to an incorrect formula for the equation. In this 2. version, it is shown that the problem is due to an inadequ...

2006
Jian-Guo Liu Jie Liu Robert L. Pego

We show that in a tubular domain with sufficiently small width, the normal and tangential gradients of a harmonic function have almost the same L norm. This estimate yields a sharp estimate of the pressure in terms of the viscosity term in the Navier-Stokes equation with no-slip boundary condition. By consequence, one can analyze the NavierStokes equations simply as a perturbed vector diffusion...

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