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关于Bénard问题中扰动衰减率的估计 被引量:1
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作者 杨姝娟 李俊华 许兰喜 《水动力学研究与进展(A辑)》 CSCD 北大核心 2008年第3期239-243,共5页
该文通过数值方法研究旋转的贝纳得(Bénard)系统,在边界条件为双自由面的情形下,扰动衰减率的下确界ξ0与旋转速率之间的关系,以及该下确界与瑞利(Rayleigh)数之间的关系。结果表明:ξ0是旋转速率的增函数,且随着旋转速率的增大而... 该文通过数值方法研究旋转的贝纳得(Bénard)系统,在边界条件为双自由面的情形下,扰动衰减率的下确界ξ0与旋转速率之间的关系,以及该下确界与瑞利(Rayleigh)数之间的关系。结果表明:ξ0是旋转速率的增函数,且随着旋转速率的增大而趋于一极限值;ξ0是瑞利数的减函数;此外ξ0的变化还依赖于Prandlt数。 展开更多
关键词 旋转的Bénard系统 双自由面 扰动衰减率 Rayleigh数
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Pointwise decaying rate of large perturbation around viscous shock for scalar viscous conservation law 被引量:1
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作者 DENG ShiJin WANG WeiKe 《Science China Mathematics》 SCIE 2013年第4期729-736,共8页
In this paper, we consider the large perturbation around the viscous shock of the scalar conservation law with viscosity in one dimension case. We divide the time region into t ≤T0 and t 〉 To for a fixed constant To... In this paper, we consider the large perturbation around the viscous shock of the scalar conservation law with viscosity in one dimension case. We divide the time region into t ≤T0 and t 〉 To for a fixed constant To when applying energy method. Since To is fixed, the case t ≤ To is easy to deal with and when t 〉 To, from the decaying property of the solution, there is a priori estimate for the solution. Thus we can succeed to control the nonlinear term and get the pointwise estimate for the perturbation by the weighted energy method. 展开更多
关键词 viscous conservation law one dimension shock profile large initial data weighted energy esti- mate pointwise estimate
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