Geometric shapes of the interface surface of bicomponent flows between two concentric rotating cylinders

Geometric shapes of the interface surface of bicomponent flows between two concentric rotating cylinders
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两个同心旋转圆柱体之间双组分流界面的几何形状

DOI:
10.1007/s10483-008-1011-y
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发表时间:
2008-10
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本文研究了两同心旋转圆柱间双组分流动的界面形状问题。利用张量分析方法,在忽略粘性耗散能的影响下,该问题转化为能量泛函等周问题。我们导出了相应的欧拉-拉格朗日方程,这是一个二阶非线性椭圆边值问题。此外,考虑耗散能的影响,我们提出了另一个表征界面几何形状的总能量泛函,得到了相应的Euler-Lagrangian方程,该方程也是一个二阶非线性椭圆边值问题.因此,在这两种情况下的几何形状的问题被转换成一个非线性的二阶边值问题。
In this paper, the shape problem of interface of bicomponent flows between two concentric rotating cylinders is investigated. With tensor analysis, the problem is reduced to an energy functional isoperimetric problem when neglecting the effects of the dissipative energy caused by viscosity. We derive the associated Euler-Lagrangian equation, which is a nonlinear elliptic boundary value problem of the second order. Moreover, by considering the effects of the dissipative energy, we propose another total energy functional to characterize the geometric shape of the interface, and obtain the corresponding Euler-Lagrangian equation, which is also a nonlinear elliptic boundary value problem of the second order. Thus, the problem of the geometric shape is converted into a nonlinear boundary value problem of the second order in both cases.
DOI: 10.1016/0021-9991(92)90307-k
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