67 Result(s)
within
English
Engineering
Classical and Continuum Physics
Theoretical and Applied Mechanics
Yi**ang Chen
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Article
Reynolds-stress modelling of turbulent rotating flows
The present analysis shows that the EVM can not reflect the turbulence physics in non-inertial frame. The effects of Coriolis force on turbulence is embodied naturally in the Reynolds-stress transport equation...
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Article
Piezoelectric Analogy of Generalized Torsion in Anisotropic Elasticity
We consider a piezoelectric body bounded by a cylindrical surface in which all cross sections are of the same geometry. Suppose on the lateral surface the body is loaded in such a way that the stress and elect...
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Article
Saint-Venant Torsion of a Two-Phase Circumferentially Symmetric Compound Bar
This work is concerned with the Saint-Venant torsion problem of a two-phase circumferentially symmetric compound prismatic bar. By generalizing a method originally proposed by Packham and Shail [12], we demons...
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Article
Recent progress in nonlinear eddy-viscosity turbulence modeling
This article presents recent progresses in turbulence modeling in the Unit for Turbulence Simulation in the Department of Engineering Mechanics at Tsinghua University. The main contents include: compact Non-Li...
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Article
A Confocally Multicoated Elliptical Inclusion under Antiplane Shear: Some New Results
The problem of a confocally multicoated elliptical inclusion in an unbounded matrix subjected to an antiplane shear is studied. Making use of the complex potentials and conformal map** techniques, we show th...
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Article
Study on micronozzle flow and propulsion performance using DSMC and continuum methods
In this paper, both DSMC and Navier–Stokes computational approaches were applied to study micronozzle flow. The effects of inlet condition, wall boundary condition, Reynolds number, micronozzle geometry and Kn...
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Article
Simulation of bluff body stabilized flows with hybrid RANS and PDF method
The motivation of this study is to investigate the turbulence–chemistry interactions by using probability density function (PDF) method. A consistent hybrid Reynolds Averaged Navier–Stokes (RANS)/PDF method is...
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Article
Exact size-dependent connections between effective moduli of fibrous piezoelectric nanocomposites with interface effects
We consider the macroscopic behavior of two-phase fibrous piezoelectric composites. The fibers are of circular cross-section with the same radius. Along the interfaces between the fibers and the matrix we cons...
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Article
Rigorous Bounds on the Torsional Rigidity of Composite Shafts with Imperfect Interfaces
We derive upper and lower bounds for the torsional rigidity of cylindrical shafts with arbitrary cross-section containing a number of fibers with circular cross-section. Each fiber may have different constitue...
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Article
A fast and practical method to pack spheres for mesh generation
Sphere packing is an attractive way to generate high quality mesh. Several algorithms have been proposed in this topic, however these algorithms are not sufficiently fast for large scale problems. The paper pr...
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Article
Numerical simulation on micromixer based on synthetic jet
This paper studied a concept of micromixer with a synthetic jet placed at the bottom of a rectangular channel. Due to periodic ejections from and suctions into the channel, the fluids are mixed effectively. To...
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Article
The effect of aneurismal-wall mechanical properties on patient-specific hemodynamic simulations: two clinical case reports
Hemodynamic factors such as the wall shear stress play an important role in the pathogenesis and treatment of cerebral aneurysms. In present study, we apply computational fluid–structure interaction analyses o...
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Article
A Recipe for Building the Torsional-Rigidity Bounds of Shafts Containing Multiply Coated Fibers with Imperfect Interfaces
This work is concerned with deriving the upper and lower bounds for the torsional rigidity of cylindrical shafts with arbitrary cross-section containing a number of multiply coated fibers with imperfect interf...
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Article
Characterization of cuttlebone for a biomimetic design of cellular structures
Cuttlebone is a natural material possessing the multifunctional properties of high porosity, high flexural stiffness and compressive strength, making it a fine example of design optimization of cellular struct...
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Article
A Universal Expression for Bounds on the Torsional Rigidity of Cylindrical Shafts Containing Fibers with Arbitrary Transverse Cross-Sections
We derive upper and lower bounds for the torsional rigidity of host shafts containing a number of cylindrical fibers. The transverse cross-sections of the host shaft and the fibers are simply connected, but co...
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Article
Delayed feedback control experiments on some flexible structures
In recent decades, studies on delayed system dynamics have attracted increasing attention and advances have been achieved in stability, nonlinearity, delay identification, delay elimination and application. Ho...
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Article
Research of air-cushion isolation effects on high arch dam reservoir
A three-dimensional (3D) finite element model of air-cushion isolated arch dam is presented with the nonlinear gas-liquid-solid multi-field dynamic coupling effect taken into account. In this model, the displa...
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Article
A new method of quality improvement for quadrilateral mesh based on small polygon reconnection
In this paper, a new method of topological cleanup for quadrilateral mesh is presented. The method first selects a patch of mesh around an irregular node. It then seeks the best connection of the selected patc...
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Article
Application of new double side approach method to the solution of super-elliptical plate problems
The new double side approach method combining the mathematical programming and the subdomain method in the method of weighted residual is presented in this article. Under the validation of maximum principle, a...
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Article
An iterative algorithm for analysis of coupled structural-acoustic systems subject to random excitations
This paper analyzes the random response of structural-acoustic coupled systems. Most existing works on coupled structural-acoustic analysis are limited to systems under deterministic excitations due to high co...
