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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Nonlinear Stability of Shear Flows and Rotating Flows in Fluid Dynamics
流体动力学 剪切流 旋转流 非线性稳定性
2023/4/25
Hydrodynamic stability at high Reynolds number is a central topic in fluid mechanics. It is closely related to turbulence. Whereas the laminar velocity profile is linearly stable for all Reynolds numb...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Dynamics near a shear flow with Coriolis force
科里奥利力 剪切流 动力学
2023/5/16
In this talk, I will discuss the dynamics near a shear flow when the Coriolis force is involved. Compared with the non-Coriolis case, the spectral properties of the linearized Euler operator change fu...
Sex in the surf zone: the effect of hydrodynamic shear stress on the fertilization and early development of free-spawning invertebrates. Stanford University
hydrodynamic shear stress free-spawning invertebrates
2015/11/12
Sex in the surf zone: the effect of hydrodynamic shear stress on the fertilization and early development of free-spawning invertebrates. Stanford University。
Critical state plasticity. Part VII: Triggering a shear band in variably saturated porous media
Bifurcation Critical state theory Heterogeneity Mixed formulation Shear band Unsaturated porous media
2015/7/1
In a previous paper (Part VI), the impact of spatially varying density on the localization of deformation of granular materials has been quantified using mesoscopic representations of stresses and def...
Micropolar hypoplasticity for persistent shear band in heterogeneous granular materials
Finite elements Heterogeneity Hypoplasticity Micropolar theory Persistent shear band
2015/7/1
Persistent shear bands in heterogeneous materials develop progressively, rather than instantaneously. For a meaningful capture of this deformation pattern, the band must develop naturally and freely u...
Bifurcation of elastoplastic solids to shear band mode at finite strain
Bifurcation Elastoplastic solids Shear bond mode Finite strain
2015/7/1
This paper formulates and implements a finite deformation theory of bifurcation of elastoplastic solids to planar bands within the framework of multiplicative plasticity. Conditions for the onset of s...
Hydrodynamic shear removal of the nuisance stalk-forming diatom Didymosphenia geminata
nuisance stalk-forming diatom Didymosphenia Hydrodynamic
2014/4/1
The removal of benthic algae during periods of high flow is critical in maintaining the biodiversity of
stream ecosystems. Here we determine a shear removal function for the nuisance, stalk-for...
Modeling the transition to turbulence in shear flows
Modeling transition turbulence shear flows
2011/8/5
Abstract: One-dimensional models are presented for transitional shear flows. The models have two variables corresponding to turbulence intensity and mean shear. These variables evolve according to sim...
Stability and turbulent transport in rotating shear flows: prescription from analysis of cylindrical and plane Couette flows data
Stability and turbulent transport rotating shear flow
2011/8/30
This paper provides a prescription for the turbulent viscosity in rotating shear flows for use e.g. in geophysical and astrophysical contexts. This prescription is the result of the detailed analysis ...
Adhesion behavior of endothelial progenitor cells to endothelial cells in simple shear flow
Endothelial progenitor cell Endothelial cell Cell adhesion Flow chamber Immersed boundary method
2012/2/28
The adhesion of endothelial progenitor cells (EPCs) on endothelial cells (ECs) is one of the critical physiological processes for the regenesis of vascular vessels and the prevention of serious cardio...
A spherical cavity expansion model for penetration of ogival-nosed projectiles into concrete targets with shear-dilatancy
Spherical cavity expansion Shear dilatancy Ogival-nosed projectile Concrete target Penetration Perforation
2012/2/28
A dynamic spherical cavity-expansion penetration model is suggested herein to predict the penetration and perforation of concrete targets struck normally by ogivalnosed projectiles. Shear dilatancy as...
Effects of bottom shear stresses on the wave-induced dynamic response in a porous seabed: PORO–WSSI (shear) model
Bottom shear stresses Wave-induced dynamic response Porous seabed “u–p&rdquo approximation Biot’s theory
2012/2/28
When ocean waves propagate over the sea floor, dynamic wave pressures and bottom shear stresses exert on the surface of seabed. The bottom shear stresses provide a horizontal loading in the wave-seabe...
Bending of orthotropic plates resting on Pasternak’s foundations using mixed shear deformation theory
Mixed theory Bending Rectangular plates Pasternak’s model
2012/2/28
The mixed first-order shear deformation plate theory (MFPT) is employed to study the bending response of simply-supported orthotropic plates. The present plate is subjected to a mechanical load and re...
Parametric study on supersonic flutter of angle-ply laminated plates using shear deformable finite element method
Panel flutter Angle-ply laminates Fiber orientation Flow yaw angle Length-to-thickness ratio
2012/2/29
The influence of fiber orientation, flow yaw angle and length-to-thickness ratio on flutter characteristics of angle-ply laminated plates in supersonic flow is studied by finite element approach. The ...
Transverse shear and normal deformation theory for vibration analysis of curved bands
dynamic analysis ibrations layered band amping
2010/3/12
A new laminate model is presented for the dynamic analysis of laminated curved bands. The collocation curved band is used to denote a cylinder panel in the plane strain state. The differential equatio...