A weak coupling method between the dynamics code HOST and the 3D unsteady Euler code WAVES

2001 ◽  
Vol 5 (6) ◽  
pp. 397-408 ◽  
Author(s):  
Gaëlle Servera ◽  
Philippe Beaumier ◽  
Michel Costes
Keyword(s):  
Weak Coupling ◽  
Coupling Method ◽  
Weak Coupling Method

EXPERIMENTAL TRACKING OF UNSTABLE ORBITS IN DRIVEN DIODE RESONATOR BY WEAK COUPLING

1996 ◽  
Vol 06 (04) ◽  
pp. 769-774 ◽  
Author(s):  
JONG CHEOL SHIN ◽  
SOOK-IL KWUN ◽  
YOUNGTAE KIM
Keyword(s):  
Feedback Control ◽  
Weak Coupling ◽  
Control Parameter ◽  
Chaotic Regime ◽  
Coupling Method ◽  
Generic Properties ◽  
Wide Range ◽  
Resonator System ◽  
Weak Coupling Method

The weak coupling method is demonstrated to stabilize and track the unstable orbits in the diode resonator system. Continuous tracking of the unstable orbits could be achieved over a wide range from the periodic down to the deep chaotic regime as the control parameter is varied continuously without changing the feedback control parameter. During the tracking of unstable orbits, hysteresis as well as switching of the attractors are observed and these are supposed to be the generic properties of continuous tracking.

scholarly journals Parametrization of stochastic multiscale triads

2016 ◽  
Author(s):  
Jeroen Wouters ◽  
Stamen I. Dolaptchiev ◽  
Valerio Lucarini ◽  
Ulrich Achatz
Keyword(s):  
Model Reduction ◽  
Weak Coupling ◽  
Degrees Of Freedom ◽  
Coupling Model ◽  
Linear Response Theory ◽  
Coupling Method ◽  
Scale Separation ◽  
Time Scale Separation ◽  
Weakly Coupled ◽  
Weak Coupling Method

Abstract. We discuss applications of a recently developed method for model reduction based on linear response theory of weakly coupled dynamical systems. We apply the weak coupling method to simple stochastic differential equations with slow and fast degrees of freedom. The weak coupling model reduction method results in general in a non-Markovian system, we therefore discuss the Markovianization of the system to allow for straightforward numerical integration. We compare the applied method to the equations obtained through homogenization in the limit of large time scale separation between slow and fast degrees of freedom. We numerically compare the ensemble spread from a fixed initial condition, correlation functions and exit times from a domain. The weak coupling method gives more accurate results in all test cases, albeit with a higher numerical cost.

The investigation on anomalous isotope effect coefficient of LaSrCuO superconductor

2019 ◽  
Vol 33 (31) ◽  
pp. 1950379
Author(s):  
P. Mycharoen ◽  
P. Udomsamuthirun
Keyword(s):  
Experimental Data ◽  
Critical Temperature ◽  
Temperature Dependence ◽  
Isotope Effect ◽  
Weak Coupling ◽  
Numerical Results ◽  
Coupling Method ◽  
Density Of State ◽  
Van Hove Singularity ◽  
Weak Coupling Method

In this research, the anomalous isotope effect coefficient of LaSrCuO superconductor was investigated in the weak-coupling method. The constant and van Hove singularity density of state, pseudogap, and the form of pseudogap temperature dependence on critical temperature are included in our calculation. Finally, the numerical results are shown in comparison with the experimental data of LaSrCuO superconductor. We found that the van Hove singularity density of state and the inversely relation of pseudogap temperature and critical temperature can fit well with the anomalous isotope effect coefficient data of LaSrCuO superconductor.

scholarly journals Parameterization of stochastic multiscale triads

2016 ◽  
Vol 23 (6) ◽  
pp. 435-445 ◽  
Author(s):  
Jeroen Wouters ◽  
Stamen Iankov Dolaptchiev ◽  
Valerio Lucarini ◽  
Ulrich Achatz
Keyword(s):  
Model Reduction ◽  
Weak Coupling ◽  
Degrees Of Freedom ◽  
Coupling Model ◽  
Linear Response Theory ◽  
Coupling Method ◽  
Test Cases ◽  
Weakly Coupled ◽  
Weak Coupling Method ◽  
Markovian System

Abstract. We discuss applications of a recently developed method for model reduction based on linear response theory of weakly coupled dynamical systems. We apply the weak coupling method to simple stochastic differential equations with slow and fast degrees of freedom. The weak coupling model reduction method results in general in a non-Markovian system; we therefore discuss the Markovianization of the system to allow for straightforward numerical integration. We compare the applied method to the equations obtained through homogenization in the limit of large timescale separation between slow and fast degrees of freedom. We numerically compare the ensemble spread from a fixed initial condition, correlation functions and exit times from a domain. The weak coupling method gives more accurate results in all test cases, albeit with a higher numerical cost.

scholarly journals VERIFICATION OF SEEPAGE FLOW CALCULATION BASED ON FLUID-GROUND WEAK COUPLING ANALYSIS MODEL

2018 ◽  
pp. 68
Author(s):  
Riku Okajima ◽  
Yuki Ohki ◽  
Shinji Taenaka ◽  
Shunsuke Moriyasu ◽  
Takeji Deji ◽  
...  
Keyword(s):  
Weak Coupling ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Flow Analysis ◽  
Seepage Flow ◽  
Coupling Method ◽  
Resistance Force ◽  
Analysis Model ◽  
Fluid Analysis ◽  
Fluid Resistance

In order to evaluate destruction of coastal structure caused by tsunami, it is essential to establish coupling method of fluid and ground. Arikawa et. Al.(2009) developed the model using weak coupling method of fluid analysis and ground analysis (named as CADMAS-STR). It is performed by mutual communication between pressure on fluid side and displacement on structure side. Based on boundary pressure from the fluid side, the ground side calculates seepage flow analysis using Biot's equation. On the other hand, the fluid side converts the ground region to porosity and calculates the resistance force to calculate seepage on the fluid side. In this study, based on Yoshioka's research, we applied Dupuit-Forchheimer's rule in CADMAS-STR's fluid resistance calculation, and verify its validity by comparing it with physical experiment. Furthermore, we compared pore water pressure

Concrete mechanical behaviour and calcium leaching weak coupling

2006 ◽  
Vol 10 (9) ◽  
pp. 1147-1175 ◽  
Author(s):  
Laurie Lacarrièrre ◽  
Alain Sellier ◽  
Xavier Bourbon
Keyword(s):  
Mechanical Behaviour ◽  
Weak Coupling ◽  
Calcium Leaching
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