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Reference 1: http://physics.info/shock/


A shockwave is high pressure wave produced by an object that travels faster than the speed of sound according to the same medium characteristics, in which different changes can be measured for example; extreme pressure and rising of the temperature.

The visualisation of the shockwave can be seen in the following picture.

History

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historia por francistofrancisco.....



Shockwave

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As an object moves through a gas, the gas molecules are deflected around the object. If the speed of the object is much less than the speed of sound of the gas, the density of the gas remains constant and the flow of gas can be described by conserving momentum and energy. As the speed of the object increases towards the speed of sound, we must consider compressibility effects on the gas. The density of the gas varies locally as the gas is compressed by the object

Extracorporeal shock wave lithotripsy (ESWL) is one of the well-known applications of shock waves. In addition to this success, , shock waves are applied to treat cancer, orthopaedic surgery in recent years. In brain neuro-surgery a revasculariztion of cerebral thrombosis is going to be established. Many interesting problems remained unresolved and its further improvements are required in order to achieve successful clinical applications

Why Shock wave Shockwave happens

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When the speed of a source exceeds the speed of sound (v > c) the wave fronts lag behind the source in a cone-shaped region with the source at the vertex. The edge of the cone forms a supersonic wave front with an unusual large amplitude called a "shock wave". When a shock wave reaches an observer a "sonic boom" is heard.

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