演講公告

演講主題：Nonlinear Evolution of Surface Diffusion on Stressed Solid Surface
主講人：Prof. Xiaofan Li (Illinois Institute of Technology, USA)
演講日期：97年7月29日(星期二)<br>下午1:30-2:30
演講地點：(光復校區)科學一館307室
摘要內容：
The surface diffusion of an axisymmetric solid, a whisker, subject to applied uniaxial stress, is studied numerically based on a new boundary integral formulation for periodic stress configurations. An efficient semi-implicit time-stepping scheme is developed to treat the serve stiffness due to high-order derivatives. When the initial perturbation is small the effect of the stress on the motion of the whisker is found to agree with the linear stability analysis. Numerical simulations of a fully nonlinear case are also presented, and a potential break-up of the whisker is observed.

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