نتایج جستجو برای: bounce back technique

تعداد نتایج: 758954  

2000
Mondira Deb Pant Pankaj Pant D. Scott Wills Vivek Tiwari

A methodology for reducing ground bounce in typical microprocessors and image processing architectures has been described. As we approach Gigascale Integration, chip power consumption is becoming a critical system parameter. Deactivating idle units provides needed reductions in power consumption. However, it introduces inductive noise that can limit voltage scaling. The paper introduces an arch...

2008
Qisu Zou Xiaoyi He

Pressure (density) and velocity boundary conditions inside a flow domain are studied for 2D and 3-D lattice Boltzmann BGKmodels (LBGK) and new method to specify these conditions are proposed. These conditions are consistent with the boundary condition we proposed in [1] using an idea of bounce-back of non-equilibrium distribution. These conditions give excellent results for the regular LBGKmode...

2003
J. Engel D. Haugh A. Pagan

1 Setting the Scene . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Measuring the Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1 The Average Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 The Diversity of Cycles . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 The Transition Between Phases . . . . . . . . . . . . . . . . . . . 7 3 Accou...

2004
G. H. TANG W. Q. TAO Y. L. He

Isothermal gas flows in microchannels is studied using the lattice Boltzmann method. A novel equation relating Knudsen number with relaxation time is derived. The slipvelocity on the solid boundaries is reasonably realized by combining the bounce-back reflection with specular reflection in a certain proportion. Predicted characteristics in a two-dimensional microchannel flow, including slip-vel...

Journal: :Electr. Notes Theor. Comput. Sci. 2008
Alan J. Dix Masitah Ghazali Devina Ramduny-Ellis

We do not interact with systems without first performing some physical action on a physical device. This paper shows how formal notations and formal models can be developed to account for the relationship between the physical devices that we actually press, twist or pull and their effects on systems. We use state diagrams of each but find we have to extend these in order to account for features...

2007
K. Suga

In this paper, a novel boundary reconstruction scheme is developed utilizing the reinitialization scheme of the level set method. The proposed scheme transfers usual digitally defined step-like boundary data to continuously smooth surface data. It is confirmed that the lattice Boltzmann simulation by the interpolated bounce-back boundary condition with the present scheme well reproduces the dra...

Journal: :Entropy 2015
Qing Chen Hongping Zhou Xuesong Jiang Linyun Xu Qing Li Yu Ru

In this paper, an improved bounce-back boundary treatment for fluid systems in the lattice Boltzmann method [Yin, X.; Zhang J. J. Comput. Phys. 2012, 231, 4295–4303] is extended to handle the electrokinetic flows with complex boundary shapes and conditions. Several numerical simulations are performed to validate the electric boundary treatment. Simulations are presented to demonstrate the accur...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1388

هدف از این تحقیق توسعه روش لتیس-بولتزمن برای تحلیل جریان و انتقال گرما در نانوسیال تراکم¬ناپذیر بوده است. لتیس برای گسسته سازی معادلات استفاده شده و برای جمله برخورد در معادله بولتزمن مدل bgk به کار رفته است. در حل عددی معادلات توزیع جریان و انرژی بولتزمن، روش حجم محدود مرکز سلول با شبکه دلخواه استفاده گردید. با ارایه ایده جدید فاکتورهای محاسبه شار و انرژی به همراه گسسته-سازی جمله زمانی معادله ...

Journal: :Journal of thoracic imaging 2012
Christopher M Walker Jonathan H Chung Gautham P Reddy

APPEARANCE Appearance: The septal bounce is a paradoxical bouncing motion of the interventricular septum initially directed towards and then away from the left ventricle during early diastole (Fig. 1 and see Video, Supplemental Digital Content 1, which demonstrates characteristic septal bounce on cine SSFP 4-chamber images, http://links.lww.com/JTI/A16). It is accentuated by deep inspiration an...

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