نتایج جستجو برای: scale flow convergence and boundary

تعداد نتایج: 17026844  

Journal: :SIAM Journal on Mathematical Analysis 1992

In this article, the vibrational behavior of a spinning cylindrical thick shell carrying spring- mass systems and conveying viscos fluid flow under various temperature distributions is investigated. This structure rotates about axial direction and the formulations include the coriolis and centrifugal effects. In addition, this system is conveying viscous fluid, and the related force is calculat...

Journal: :J. Comput. Physics 2010
Yongsam Kim Ming-Chih Lai

In this paper, we develop an immersed boundary (IB) method to simulate the dynamics of inextensible vesicles interacting with an incompressible fluid. In order to take into account the inextensibility constraint of the vesicle, the penalty immersed boundary (pIB) method is used to virtually decouple the fluid and vesicle dynamics. As numerical tests of our current pIB method, the dynamics of si...

Journal: :SIAM J. Scientific Computing 2001
Eunok Jung Charles S. Peskin

Flow driven by pumping without valves is examined, motivated by biomedical applications: cardiopulmonary resuscitation (CPR) and the human fetus before the development of the heart valves. The direction of flow inside a loop of tubing which consists of (almost) rigid and flexible parts is investigated when the boundary of one end of the flexible segment is forced periodically in time. Despite t...

2013
M. Feischl T. Führer M. Karkulik J. M. Melenk D. Praetorius Markus Aurada Michael Feischl Thomas Führer Michael Karkulik Dirk Praetorius Markus Faustmann Jens Markus Melenk

We analyze an adaptive boundary element method for Symm’s integral equation in 2D and 3D which incorporates the approximation of the Dirichlet data g into the adaptive scheme. We prove quasi-optimal convergence rates for any H-stable projection used for data approximation.

A. R. Omidvar Y. Bakhshan

  Micro scale gas flows has attracted significant research interest in the last two decades. In this research, the fluid flow of gases in the stepped micro-channel at a wide range of Knudsen number has been analyzed with using the Lattice Boltzmann (MRT) method. In the model, a modified second-order slip boundary condition and a Bosanquet-type effective viscosity are used to consider the veloci...

Journal: :مکانیک سازه ها و شاره ها 0
محسن نظری استادیار دانشکده مهندسی مکانیک محمد حسن کیهانی دانشگاه شاهرود حسنی شکری دانشگاه شاهرود

in this paper, two dimensional natural convection heat transfer in non-square cavities such as triangle, trapezoid, quadrant-circle and semi-circular are investigated via lattice boltzmann method. the prandtl number is taken as 0.71 that corresponds to that of air. the results show that, when the flow pattern consists of two rotating cell, there is a extremum point in the variations of the loca...

2006
Joseph A. Biello Andrew J. Majda

A self-contained derivation of the IPESD models [Majda, A.J., Klein, R., 2003. Systematic multi-scale models for the tropics. J. Atmos. Sci. 60, 393–408] governing synoptic and planetary scale tropical flows is provided. This derivation demonstrates the analytic tractability of the model and the effect of zonally and meridionally tilted synoptic scale heating on the forcing of planetary scale f...

ژورنال: مهندسی دریا 2016

Estimation of siltation depth in harbors and estuaries plays an important role in design of marine structures. In this paper, siltation process at Bushehr estuary as one of the most important water bodies in south of Iran is modeled by so-called MIKE 21 mathematical model. To achieve this, at first a large scale hydrodynamic model calibrated by IRANSIAM registered water levels is developed whil...

2011
Sangmin Lee Krishna Garikipati Anton Van der Ven Claudia Meyer

3 1 Computational Homogenization Approach Micro-scale Boundary Conditions 32 3 2 Micro-Macro linking Transferring Fluxes and Diffusivities 36 3 3 Micro-scale model 37 3 3 1 Description of flow in the porous matrix at micro-scale 38 3 4 Macro scale model 41 3 5 Tracking of the interface using level set method and adaptive meshing 46 3 6 Computational approach and Numerical Results 47 3 6 1 Conve...

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