Energy losses in non-classical free surface flows
Energy losses in non-classical free surface flows
复制标题
非经典自由表面流中的能量损失
DOI：
10.1007/978-94-011-0938-3_39
复制
发表时间：
1994
期刊：
影响因子：
--
通讯作者：
W. Szymczak
中科院分区：
文献类型：
--
作者：
W. Szymczak
与水的运动有关的最熟悉的现象之一是波浪在海岸的破碎。另一个重要但不太熟悉的例子是水下气泡破裂时形成的液体射流的冲击。这两种现象都涉及到液体表面的碰撞，代表了经典流体动力学理论的崩溃。本文介绍了这种非经典现象的计算使用的算法的基础上的广义流体力学理论。在液体碰撞表现为非弹性的附加假设下，流场的总机械能将在碰撞时减小。包括在本文中的例子是一个精确的解决方案的能量损失所造成的液体圆柱体的正面碰撞的计算比较，和计算收敛的能量损失的研究，由于气泡内的液体射流冲击固体壁。本文还计算了浅深度气泡的动力学。
One of the most familiar phenomena associated with the motion of water is the breaking of waves at the seashore. Another important, albeit less familiar example, is the impact of a liquid jet, formed during the collapse of an underwater bubble. Both phenomena involve the collision of liquid surfaces and represent a breakdown of classical hydro dynamic theory. This paper presents computations of such non-classical phenomena using an algorithm based on a generalized theory for hydrodynamics. Under the additional assumption that liquid collisions behave inelastically, the total mechanical energy of the flow field will be reduced at the time of impact. Examples included in this paper are a comparison of computations to an exact solution of the energy loss resulting from a face-on collision of liquid cylinders, and a computational convergence study of the energy loss due to a liquid jet within a bubble impacting a solid wall. A computation of the dynamics of a shallow depth bubble is also presented.