Results 1 to 10 of about 67,419 (287)

Dynamic programming approach to structural optimization problem - numerical algorithm [PDF]

open access: yesOpuscula Mathematica, 2014
In this paper a new shape optimization algorithm is presented. As a model application we consider state problems related to fluid mechanics, namely the Navier-Stokes equations for viscous incompressible fluids.
Piotr Fulmański   +2 more
doaj   +4 more sources

Optimal Control Theory for a System of Partial Differential Equations Associated with Stratified Fluids

open access: yesMathematics, 2021
In this paper, we investigate the existence of an optimal solution of a functional restricted to non-linear partial differential equations, which ruled the dynamics of viscous and incompressible stratified fluids in R3.
Edgardo Alvarez   +2 more
doaj   +1 more source

A new upper bound for the largest growth rate of linear Rayleigh–Taylor instability

open access: yesJournal of Inequalities and Applications, 2021
We investigate the effect of (interface) surface tensor on the linear Rayleigh–Taylor (RT) instability in stratified incompressible viscous fluids.
Changsheng Dou   +2 more
doaj   +1 more source

Convective layered flows of a vertically whirling viscous incompressible fluid. Temperature field investigation

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2020
The paper discusses a class of exact solutions of the Oberbeck–Boussinesq equations suitable for describing three-dimensional nonlinear layered flows of a vertically swirling viscous incompressible fluid.
Natal'ya Vladimirovna Burmasheva   +1 more
doaj   +1 more source

On the Evolution of Compressible and Incompressible Viscous Fluids with a Sharp Interface

open access: yesMathematics, 2021
In this paper, we consider some two phase problems of compressible and incompressible viscous fluids’ flow without surface tension under the assumption that the initial domain is a uniform Wq2−1/q domain in RN (N≥2). We prove the local in the time unique
Takayuki Kubo, Yoshihiro Shibata
doaj   +1 more source

Convective two-layered flow and temperature distribution through an inclined porous medium in a rotating system [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2020
The convective motion of two incompressible viscous fluids that are different in thermal conductivities, viscosities and densities with heat transfer aspects in a rotating inclined channel, in which the pressure gradient is kept constant, is studied ...
Karuna Sree Chitturi   +2 more
doaj   +1 more source

Nonlinear instability for nonhomogeneous incompressible viscous fluids [PDF]

open access: yesScience China Mathematics, 2013
We investigate the nonlinear instability of a smooth steady density profile solution of the threedimensional nonhomogeneous incompressible Navier-Stokes equations in the presence of a uniform gravitational field, including a Rayleigh-Taylor steady-state solution with heavier density with increasing height (referred to the Rayleigh-Taylor instability ...
Jiang, Fei, Jiang, Song, Ni, GuoXi
openaire   +2 more sources

Traveling Waves of Some Symmetric Planar Flows of Non-Newtonian Fluids [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2019
We present some variants of Burgers-type equations for incompressible and isothermal planar flow of viscous non-Newtonian fluids based on the Cross, the Carreau and the power-law rheology models, and on a symmetry assumption on the flow.
Dongming Wei, Yupeng Shu
doaj   +1 more source

On Rayleigh–Taylor instability in Navier–Stokes–Korteweg equations

open access: yesJournal of Inequalities and Applications, 2023
This paper focuses on the Rayleigh–Taylor instability in the two-dimensional system of equations of nonhomogeneous incompressible viscous fluids with capillarity effects in a horizontal periodic domain with infinite height.
Xuyan Zhang, Fangfang Tian, Weiwei Wang
doaj   +1 more source

Revisiting plane Couette-Poiseuille flows of a piezo-viscous fluid [PDF]

open access: yes, 2008
We re-examine fully developed isothermal unidirectional plane Couette-Poiseuille flows of an incompressible fluid whose viscosity depends linearly on the pressure as previously considered in Hron et al 2001.
Suslov, Sergey A., Tran, Thien Duc
core   +2 more sources

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