3,062 research outputs found
Numerical benchmarking of fluid-rigid body interactions
We propose a fluid-rigid body interaction benchmark problem, consisting of a
solid spherical obstacle in a Newtonian fluid, whose centre of mass is fixed
but is free to rotate. A number of different problems are defined for both two
and three spatial dimensions. The geometry is chosen specifically, such that
the fluid-solid partition does not change over time and classical fluid solvers
are able to solve the fluid-structure interaction problem. We summarise the
different approaches used to handle the fluid-solid coupling and numerical
methods used to solve the arising problems. The results obtained by the
described methods are presented and we give reference intervals for the
relevant quantities of interest
On the two-dimensional steady Navier-Stokes equations related to flows around a rotating obstacle (Workshop on the Boltzmann Equation, Microlocal Analysis and Related Topics)
"Workshop on the Boltzmann Equation, Microlocal Analysis and Related Topics". May 27~29, 2016. edited by Hisashi Okamoto, Yoshio Tsutsumi, Naomasa Ueki, Tadayoshi Adachi and Senjo Shimizu. The papers presented in this volume of RIMS Kôkyûroku Bessatsu are in final form and refereed.We study a model problem related to the two-dimensional stationary Navier-Stokes equations with a rotating effect, which naturally appears in the analysis of the flows around a rotating obstacle. The unique existence of solutions and their asymptotic behavior at spatial infinity are established when the given external force is sufficiently small in a scale critical space
Constrained flow around a magnetic obstacle
Many practical applications exploit an external local magnetic field --
magnetic obstacle -- as an essential part of their constructions. Recently, it
has been demonstrated that the flow of an electrically conducting fluid
influenced by an external field can show several kinds of recirculation. The
present paper reports a 3D numerical study whose some results are compared with
an experiment about such a flow in a rectangular duct.Comment: accepted to JFM, 26 pages, 14 figure
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