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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Dispersive estimates for the inviscid rotating stratified Boussinesq equations in the stratification-dominant three-scale limit
三尺度极限 无粘性旋转分层 Boussinesq方程 色散估计
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2023/5/5
A dispersive decay estimate is proven for the linear propagator of the three-scale rotating stratified Boussinesq equations in the stratification-dominant regime. Because the phase function of that pr...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars： Dispersive estimates for the inviscid rotating stratified Boussinesq equations in the stratification-dominant three-scale limit
分层主导 三尺度极限 无粘性旋转分层 Boussinesq方程 色散估计
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2023/5/5
A dispersive decay estimate is proven for the linear propagator of the three-scale rotating stratified Boussinesq equations in the stratification-dominant regime. Because the phase function of that pr...
Clever experiment documents multi-scale fluid dynamics（图）
Clever experiment documents multi-scale fluid dynamics
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2017/9/4
University of Chicago physicists working in the nascent field of experimental vortex dynamics have, with unexpected help from a Sharpie marker, achieved the first measurements of an elusive but fundam...
Turbulent flow properties of large-scale vortex systems
gridfree turbulence vortex methods
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2016/5/18
Large-scale computations of dynamically interacting vortex tubes forming filaments are performed with a view toward investigating their relationship to turbulent fluid flow. It is shown that the stati...
海洋研究院刘谋斌研究员出版英文专著“Particle Methods for Multi-Scale and Multi-Physics”
流体力学 耗散粒子动力学
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2015/12/1
北京大学海洋研究院刘谋斌研究员撰写的专著“Particle Methods for Multi-Scale and Multi-Physics”近期由著名科技图书出版公司World Scientific出版（ISBN: 978-981-4571-69-2）。
On the pore-scale mechanisms leading to brittle and ductile deformation behavior of crystalline rocks
crystal plasticity deformation mechanisms finite element heterogeneity microfracture
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2015/7/1
Deformation mechanisms at the pore scale are responsible for producing large strains in porous rocks. They include cataclastic flow, dislocation creep, dynamic recrystallization, diffusive mass transf...
Critical state plasticity. Part VI:Meso-scale finite element simulation of strain localization in discrete granular materials
Granular materials Strain localization
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2015/7/1
Development of more accurate mathematical models of discrete granular material behavior requires a fundamental understanding of deformation and strain localization phenomena. This paper utilizes a mes...
Large scale-free networks are not disassortative
Large scale-free networks disassortative Statistical Mechanics
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2012/4/19
Mixing patterns in large self-organizing networks, such as the Internet, the World Wide Web, social and biological networks are often characterized by degree-degree correlations between neighbouring n...
Realistic time-scale fully atomistic simulations of surface nucleation of dislocations in pristine nanopillars
Dislocations Molecular Dynamics Atomistic simulation Nucleation Activation Energy
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2012/2/27
We use our recently proposed accelerated dynamics algorithm (Tiwary and van de Walle, 2011) to calculate temperature and stress dependence of activation free energy for surface nucleation of dislocati...
Surrogate-based modeling and dimension reduction techniques for multi-scale mechanics problems
Multi-scale mechanics Cryogenic cavitating flow Surrogate-based modeling Active flow control Engineering system
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2012/2/28
Successful modeling and/or design of engineering systems often requires one to address the impact of multiple “design variables” on the prescribed outcome. There are often multiple, competing objectiv...
A scale-invariant probabilistic model based on Leibniz-like pyramids
scale-invariant probabilistic model Leibniz-like pyramids Statistical Mechanics
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2011/9/29
Abstract: We introduce a family of probabilistic {\it scale-invariant} Leibniz-like pyramids and $(d+1)$-dimensional hyperpyramids ($d=1,2,3,...$), characterized by a parameter $\nu>0$, whose value de...
Effects of information transmission delay and channel blocking on synchronization in scale-free Hodgkin–Huxley neuronal networks
Scale-free neuronal networks Information transmission delay Ion channel blocking Synchronization
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2012/2/28
In this paper, we investigate the evolution of spatiotemporal patterns and synchronization transitions in dependence on the information transmission delay and ion channel blocking in scale-free neuron...
Derivation of a second-order model for Reynolds stress using renormalization group analysis and the two-scale expansion technique
Turbulent modeling Renormalization group Two-scale expansion Reynolds stress transport equation Second-order model
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2012/2/29
With the two-scale expansion technique proposed by Yoshizawa, the turbulent fluctuating field is expanded around the isotropic field. At a low-order two-scale expansion, applying the mode coupling app...
Scale-adaptive simulation of flow past wavy cylinders at a subcritical Reynolds number
Wavy cylinders Drag reduction Vortex shedding Vibration control SAS
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2012/2/29
The Xu {&} Yan scale-adaptive simulation (XY-SAS) model is employed to simulate the flows past wavy cylinders at Reynolds number 8\times 10^3 . This approach yields results in good agreement with expe...
Simulation of Flameless Combustion of Natural Gas in a Laboratory Scale Furnace
Flameless combustion Mild combustion Numerical simulation Diluted combustion
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2009/10/10
The purpose of this study is to characterise the flameless combustion of natural gas, experimentally,and by CFD modelling with FLUENT. Measurements performed in a laboratory scale furnace are used as ...