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Asymptotic behavior of a steady flow in a two-dimensional pipe

Piotr Bogusław Mucha (2003)

Studia Mathematica

The paper investigates the asymptotic behavior of a steady flow of an incompressible viscous fluid in a two-dimensional infinite pipe with slip boundary conditions and large flux. The convergence of the solutions to data at infinities is examined. The technique enables computing optimal factors of exponential decay at the outlet and inlet of the pipe which are unsymmetric for nonzero fluxes of the flow. As a corollary, the asymptotic structure of the solutions is obtained. The results show strong...

Asymptotic behavior of the solutions to a one-dimensional motion of compressible viscous fluids

Shigenori Yanagi (1995)

Mathematica Bohemica

We study the one-dimensional motion of the viscous gas represented by the system v t - u x = 0 , u t + p ( v ) x = μ ( u x / v ) x + f ∫ 0 x v x ¨ , t , with the initial and the boundary conditions ( v ( x , 0 ) , u ( x , 0 ) ) = ( v 0 ( x ) , u 0 ( x ) ) , u ( 0 , t ) = u ( X , t ) = 0 . We are concerned with the external forces, namely the function f , which do not become small for large time t . The main purpose is to show how the solution to this problem behaves around the stationary one, and the proof is based on an elementary L 2 -energy method.

Asymptotic behaviors of internal waves

J. Bona, D. Lannes, J.-C. Saut (2008)

Journées Équations aux dérivées partielles

We present here a systematic method of derivation of asymptotic models for internal waves, that is, for the propagation of waves at the interface of two fluids of different densities. Many physical regimes are investigated, depending on the physical parameters (depth of the fluids, amplitude and wavelength of the interface deformations). This systematic method allows us to recover the many models existing in the literature and to derive some new models, in particular in the case of large amplitude...

Asymptotic behaviour in planar vortex theory

Antonio Ambrosetti, Jian Fu Yang (1990)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

The asymptotic behaviour of solutions of a class of free-boundary problems arising in vortex theory is discussed.

Asymptotic dynamics in double-diffusive convection

Mikołaj Piniewski (2008)

Applicationes Mathematicae

We consider the double-diffusive convection phenomenon and analyze the governing equations. A system of partial differential equations describing the convective flow arising when a layer of fluid with a dissolved solute is heated from below is considered. The problem is placed in a functional analytic setting in order to prove a theorem on existence, uniqueness and continuous dependence on initial data of weak solutions in the class ( [ 0 , ∞ ) ; H ) ∩ L ² l o c ( ℝ + ; V ) . This theorem enables us to show that the infinite-dimensional...

Asymptotic estimates for a perturbation of the linearization of an equation for compressible viscous fluid flow

Gerhard Ströhmer (2008)

Studia Mathematica

We prove a priori estimates for a linear system of partial differential equations originating from the equations for the flow of a barotropic compressible viscous fluid under the influence of the gravity it generates. These estimates will be used in a forthcoming paper to prove the nonlinear stability of the motionless, spherically symmetric equilibrium states of barotropic, self-gravitating viscous fluids with respect to perturbations of zero total angular momentum. These equilibrium states as...

Currently displaying 481 – 500 of 3470