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arXiv 1807.07348math.AP
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自然边界条件下牛顿流体与Koiter型壳相互作用的整体弱解

Global weak solutions for an Newtonian Fluid interacting with a Koiter Type Shell under natural boundary conditions

Hannes Eberlein, Michael Ruzicka

摘要:

我们考虑粘性不可压缩牛顿流体流过薄弹性结构。结构的运动由线性化Koiter壳的方程描述,其运动被限制为横向位移。流体和结构通过速度的连续性以及流体和结构之间的界面上的表面力的平衡来耦合。在一个固定的流入和流出区域,我们规定自然边界条件。我们证明了只要壳不自相交,就存在弱解。

英文摘要:

We consider an viscous, incompressible Newtonian fluid flowing through a thin elastic structure. The motion of the structure is described by the equations of a linearised Koiter shell, whose motion is restricted to transverse displacements. The fluid and the structure are coupled by the continuity of velocities and an equilibrium of surface forces on the interface between fluid and structure. On a fixed in- and outflow region we prescribe natural boundary conditions. We show that weak solutions exist as long as the shell does not self-intersect.

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