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Lattice Boltzmann Method with Tree-structured Mesh and Treatment of Curved Boundaries
CHEN Yu, XIA Zhenhua, CAI Qingdong
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS 2010, 27 (
1
): 23-30.
Abstract
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430
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756
）
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Lattice Boltzmann method(LBM) and back and forth error compensation and correction(BFECC) skill are combined together for two-dimensional incompressible flows with quad-tree mesh.The scheme is equivalent to conventional LBM. Results for flows in two-dimensional cavity and around a cylinder demonstrate the scheme.
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Numerical Study on Friction Between Solid Body and Granular Material
SHENG Xiaowei, LUO Zhiyuan, CAI Qingdong
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS 2009, 26 (
3
): 403-408. DOI:
10.3969/j.issn.1001-246X.2009.03.010
Abstract
（
334
）
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（359KB）（
1167
）
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A numerical study on shearing movement of granular system with a dragging solid body on top is presented.It focuses on friction between body and particles.It shows that friction coefficient varies with dragging velocity.This behavior,totally different from interaction between two solid bodies,implies complexity of granular system.
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AN UPWIND FINITE ELEMENT SCHEME ON UNSTRUCTED GRIDS
Cai Qingdong
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS 1998, 15 (
6
): 667-671.
Abstract
（
234
）
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（257KB）（
680
）
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Based on the modification to the integal domain, an upwind finite element scheme is presented. Just as the first order upwind difference scheme, which is its conterpart in finite difference methods, it applies to construct many numerical schemes on unstructed grids.
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NUMERICAL SIMULATION OF THREE-DIMENSIONAL HYPERSONIC INVISCID FLOWS OVER SPACEVEHICLES WITH FCT FINITE ELEMENT METHOD
Cai Qingdong, Wu Wangyi
CHINESE JOURNAL OF COMPUTATIONAL PHYSICS 1998, 15 (
4
): 476-482.
Abstract
（
270
）
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（294KB）（
721
）
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FEM-FCT is used to solve three-dimensional hypersonic inviscid flow.The flow fields around sphere,modified space shuttle orbiter and capsule type vehicle are gained on unstructured tetrahedron grids.The results show that the scheme is valid and has high resolution to shock waves.
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