报告题目: |
Planetary precession and libration: Theory and simulation |
报告人: |
Zhang KeKe |
|
英国Exeter大学应用数学系 教授
|
报告时间: |
2010-06-24 16:00 |
报告地点: |
清华大学科学馆118会议室 |
主办单位: |
清华大学周培源应用数学研究中心 |
简介: |
Deformed by both tidal force and rotational effects, planets are usually in the shape of an ellipsoid. Gravitational interaction between a planet and its parent star forces planetary precession and libration. Fluid motion in the deep planetary interior, driven by planetary precession and libration, may generate and maintain planetary magnetic fields. We shall present the mathematical theory of precessionally or librationally driven flows by considering a viscous, incompressible fluid confined in an ellipsoidal planet which is precessing or librating. We shall also present direct numerical simulation of the same problem using an EBE (Element-By-Element) finite element method, showing a satisfactory agreement between the analytical solution and the nonlinear numerical simulation. |
|
