Science. 1992 Jun 12;256(5063):1531-6. doi: 10.1126/science.256.5063.1531.
The phenomenon of ocean waves breaking on a beach is analogous to shock waves in the atmosphere of a pulsating star. In both cases a velocity discontinuity is clearly present. In stars the upper, expanding layer halts and falls back so as to interact with the rising gas at a shock. Similarly, a bore on a beach reaches its maximum extension before sliding back onto the next incoming wave. Analogous quantities such as the surface gravity of the star and the beach gradient in the ocean have similar effects on the flows and the nature of the discontinuity between them. Phenomena that are not analogous include the thermodynamic properties of the two media. Ocean observations may help solve some problems in shock phenomena associated with stellar pulsation.
海浪在海滩上破碎的现象类似于脉动恒星大气层中的冲击波。在这两种情况下，速度不连续显然存在。在恒星中，上层膨胀层停止并回落，以便与上升气体在激波中相互作用。类似地，海滩上的激波在滑回下一个传入波之前达到最大延伸。类似的量，如恒星的表面重力和海洋中的海滩梯度，对它们之间的流动和不连续的性质有类似的影响。不类似的现象包括两种介质的热力学性质。海洋观测可能有助于解决与恒星脉动相关的激波现象中的一些问题。
