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AN EXPERIMENTAL STUDY OF THE DYNAMIC CHARACTERISTICS IN BOUNDARY LAYER IN THE flow past A TWO-DIMENSIONAL circular cylinder AT SUBCRITICAL REYNOLDS NUMBERS

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Acta Mechanica Sinica 1986年第3期2卷 232-241页

作者： Wei Qingding(Department of Mechanics,Peking University) 1. Department of Mechanics Peking University Peking China

An experimental study of the dynamic characteristics of flow past a two-dimensionalcircular cylinder is *** fluctuations of wall shear stress,surface-pressure and velocity ofthe flow are measured with hot-film,hot-wire and pressure *** frequency feature offluctuations of wall shear stress is *** cross-correlation functions of these fluctuations at anytwo points are *** experimental results reveal that there is an overall syncronousfluctuation,at the shedding frequency,in boundary layer in the flow past a two-dimensional circularcylinder at subcritical Reynolds number.

关键词： fluid mechanics fluid mechanics experimentation dynamic characteristics of boundary layer flow past a circular cylinder flow at subcritical Reynolds number

Least Square Finite Element Method for Viscous Splitting of Unsteady Incompressible Navier–Stokes Equations

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China Ocean Engineering 2018年第4期32卷 490-500页

作者： SHUI Qing-xiang WANG Da-guo HE Zhi-liang HUANG Jin School of Human Settlement and Civil Engineering Xi'an Jiaotong University School of Environmental and Resources Southwest University of Science and Technology

In order to solve unsteady incompressible Navier–Stokes(N–S) equations, a new stabilized finite element method,called the viscous-splitting least square FEM, is proposed. In the model, the N–S equations are split into diffusive and convective parts in each time step. The diffusive part is discretized by the backward difference method in time and discretized by the standard Galerkin method in space. The convective part is a first-order nonlinear *** the linearization of the nonlinear part by Newton’s method, the convective part is also discretized by the backward difference method in time and discretized by least square scheme in space. C0-type element can be used for interpolation of the velocity and pressure in the present model. Driven cavity flow and flow past a circular cylinder are conducted to validate the present model. Numerical results agree with previous numerical results, and the model has high accuracy and can be used to simulate problems with complex geometry.

关键词： unsteady incompressible N–S equations viscous splitting Newton's method least square finite element method driven cavity flow flow past a circular cylinder

维普期刊数据库

Performance Investigation of 2D Lattice Boltzmann Simulation of Forces on a circular cylinder

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Transactions of Tianjin University 2010年第6期16卷 417-423页

作者：陈同庆张庆河程亮 School of Civil Engineering Tianjin University Key Laboratory of Harbor and Ocean Engineering Ministry of Education of China School of Civil and Resource Engineering The University of Western Australia

The lattice Boltzmann method (LBM) is employed to simulate the uniform flow past a circular cylinder. The performance of the two-dimensional LBM model on the prediction of force coefficients and vortex shedding frequency is investigated. The local grid refinement technique and second-order boundary condition for curved walls are applied in the calculations. It is found that the calculated vortex shedding frequency, drag coefficient and lift coefficient are consistent with experimental results at Reynolds nu...

关键词： lattice Boltzmann method flow past a circular cylinder large eddy simulation grid refinement secondorder curved boundary treatment drag and lift coefficients

维普期刊数据库

Simulation of Incompressible Viscous flows by Local DFD-Immersed Boundary Method

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Advances in Applied Mathematics and Mechanics 2012年第3期4卷 311-324页

作者： Y.L.Wu C.Shu H.Ding Department of Mechanical Engineering National University of Singapore10 Kent Ridge CrescentSingapore 117576 Department of Modern Mechanics University of Science and Technology of ChinaHefeiAnhui 230026China

A local domain-free discretization-immersed boundary method(DFDIBM)is presented in this paper to solve incompressible Navier-Stokes equations in the primitive variable *** the conventional immersed boundary method(IBM),the local DFD-IBM solves the governing equations in the whole domain including exterior and interior of the immersed *** effect of immersed boundary to the surrounding fluids is through the evaluation of velocity at interior and exterior dependent *** be specific,the velocity at interior dependent points is computed by approximate forms of solution and the velocity at exterior dependent points is set to the wall *** compared to the conventional IBM,the present approach accurately implements the non-slip boundary *** a result,there is no flow penetration,which is often appeared in the conventional IBM *** present approach is validated by its application to simulate incompressible viscous flows around a circular *** obtained numerical results agree very well with the data in the literature.

关键词： Local domain free discretization(local DFD) immersed boundary method(IBM) incompressible flow flow past a circular cylinder