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I wonder about the following:

A shock wave is propagating from within a solid body outside into a liquid. How will it behave? Especially, will the frequency remain the same?

Ben
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  • What are you asking - experiment or theory? – Alex Trounev Mar 05 '20 at 14:40
  • Tbh, I didn't expect a difference. Sure, on a very small measurement scale level there will be a difference - but it shouldn't? – Ben Mar 06 '20 at 10:34
  • If the speed of sound is smaller in the liquid (very likely) and the two media are completely immersed within each other (e.g., solid suspended in liquid of semi-infinite volume), then the Mach number is likely to increase across the boundary if losses/dissipation due to the boundary transition are negligible. – honeste_vivere Mar 06 '20 at 14:57
  • @Ben Are you interested in the reflection of a shock wave from a free surface at the boundary of a solid with the formation of a liquid or gas? – Alex Trounev Mar 06 '20 at 17:12
  • @honeste_vivere Thank you!. But how does the frequency behave? – Ben Mar 06 '20 at 20:24
  • @AlexTrounev It's actually something out of the real world: I have something like a loudspeaker which is placed in a water tank and it uses pure single frequencies. I would like to know if those shock waves keep their frequencies when they propagate - through the liquid and at the case? – Ben Mar 06 '20 at 20:26
  • @Ben - Frequency? It's a discontinuity so technically it is composed of all frequencies, right? – honeste_vivere Mar 06 '20 at 20:55
  • @Ben A loudspeaker placed in a water does not produce shock waves. These are just sound waves of finite amplitude. – Alex Trounev Mar 07 '20 at 11:28
  • @honeste_vivere What exactly are "all" frequencies? With a single pure tone there should be - in theory - only one frequency? – Ben Mar 11 '20 at 08:30
  • @AlexTrounev Yes, sure. Sorry, I mixed it. I thought it would be a shock wave in English. – Ben Mar 11 '20 at 08:31
  • @Ben - Shock waves are NOT single pure tones. For instance, see https://physics.stackexchange.com/a/136596/59023 or https://physics.stackexchange.com/a/306184/59023 or https://physics.stackexchange.com/a/139436/59023. – honeste_vivere Mar 11 '20 at 14:26

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