نتایج جستجو برای: boundary layer thickness

تعداد نتایج: 504532  

2016
P. Sudarsana Reddy Ali J. Chamkha P. S. Reddy A. J. Chamkha

The effect of thermophoresis on heat and mass transfer flow of a micropolar fluid in the presence of Soret and Dufour effects over a stretching sheet is investigated in the present analysis. The transformed conservation equations are solved numerically using an optimized, extensively validated, variational Finite element method. The influence of key non-dimensional parameters, namely, suction p...

1995
Monique Dauge

This paper is the rst of a series of two, where we study the asymp-totics of the displacement in a thin clamped plate made of a rigid \monoclinic" material , as the thickness of the plate tends to 0. The combination of a polynomial Ansatz (outer expansion) and of a boundary layer Ansatz (inner expansion) yields a complete multi-scale asymptotics of the displacement and leads to optimal error es...

Journal: :iranian journal of neurology 0
rana sorkhabi associate professor, department of ophthalmology, nikookari eye hospital, tabriz university of medical sciences, tabriz, iran. somaiyeh mostafaei resident, department of neurology, imam reza hospital, tabriz university of medical sciences, tabriz, iran mohammadhosein ahoor assistant professor, department of ophthalmology, nikookari eye hospital, tabriz university of medical sciences, tabriz, iran mahnaz talebi associate professor, department of neurology, neuroscience research center, tabriz university of medical sciences, tabriz, iran

background: headache is one of the most disturbing symptoms with common neurological signs. variations in optic nerve perfusion quality or retinal microcirculation may end up in ganglion cell damage in patients with migraine. methods: sixty patients diagnosed with migraine and thirty normal individuals were evaluated in groups including migraine with aura, migraine without aura and controls. re...

The objective of this work is to develop deep theoretical methods that are based on the solution of the integral boundary layer equations for investigating film cooling in liquid rocket engine. The integral model assumes that heat is transferred from hot free stream gas to the liquid film both by convection and radiation. The mass is transferred to the free srteam gas by the well-known blowing ...

1995
Monique Dauge

This paper is the last of a series of two, where we study the asymptotics of the displacement in a thin clamped plate as its thickness tends to 0. In Part I, relying on the structure at innnity of the solutions of certain model problems posed on unbounded domains, we proved that the combination of a polynomial Ansatz (outer expansion) and of a boundary layer Ansatz (inner expansion) yields a co...

2002
Brian R. Hollis Derek S. Liechty

Nomenclature a w speed of sound at wall (m/s) D diameter (m) H AW adiabatic enthalpy (J/kg) H w wall enthalpy (J/kg) H 0 total enthalpy (J/kg) h heat transfer coefficient (kg/m 2 /sec), h FR Fay-Riddell heat transfer coefficient (kg/m 2 /sec) M ∞ free stream Mach number M e boundary layer edge Mach number p ∞ free stream pressure (N/m 2) q heat transfer rate (W/m 2) r radial position (m) R base...

2006
M. Lyutikov

Sharp fronts observed by Chandra satellite between dense cool cluster cores moving with near-sonic velocity through the hotter intergalactic gas, require strong suppression of thermal conductivity across the boundary. This may be due to magnetic fields tangential to the contact surface separating the two plasma components. We point out that a super-Alfvenic motion of a plasma cloud (a core of a...

2008
GOKHAN DANABASOGLU RAFFAELE FERRARI JAMES C. MCWILLIAMS

A simplified version of the near-boundary eddy flux parameterization developed recently by Ferrari et al. has been implemented in the NCAR Community Climate System Model (CCSM3) ocean component for the surface boundary only. This scheme includes the effects of diabatic mesoscale fluxes within the surface layer. The experiments with the new parameterization show significant improvements compared...

2017
Spencer J. Sherwin

We consider a smooth, spanwise-uniform forward-facing step defined by a Gauss error function of height 4 %–30 % and four times the width of the local boundary layer thickness δ99. The boundary layer flow over a smooth forward-facing stepped plate is studied with particular emphasis on stabilisation and destabilisation of the twodimensional Tollmien–Schlichting (TS) waves and subsequently on thr...

Journal: :SIAM J. Numerical Analysis 2010
Zhiming Chen Weiying Zheng

Abstract. In this paper, we propose a uniaxial perfectly matched layer (PML) method for solving the time-harmonic scattering problems in two-layered media. The exterior region of the scatterer is divided into two half spaces by an infinite plane, on two sides of which the wave number takes different values. We surround the computational domain where the scattering field is interested by a PML l...

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