Shock Waves // Science and Technology

Greetings colleagues from the Hive community, welcome back to my blog, where you can find content from the wide universe of science, mathematics, biology, physics, chemistry, philosophy and general knowledge accompanied by scientific dissemination, a special salute to the communities that stimulates the content of science.

Continuing to share the content of the wave phenomenon at the dual level field of physics, in the previous publication share about electromagnetic waves and the Doppler effect, where
In this type of wave there are changes in frequency with movements Relative depending on the source that produces the band and with respect to an observer, this phenomenon is Doppler from an emitting focus at rest and the observer, it must be considered that electromagnetic radiation can manifest itself in various ways, such as radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. A very unique piece of information is that the full range of wavelengths is what is called the electromagnetic spectrum.

Furthermore, electromagnetic waves start from a charged particle, where this particle creates an electric field that exerts a force on other particles, that is why they propagate in material media and in a vacuum. , which at the same time has the characteristic that the direction of propagation is perpendicular to the direction of oscillation. For the case of a fixed-form observer, where the frequency would be ѵ = v / λ, where v is the speed of propagation of the wave, but if the observer is evidence of a distance from the speed v0, this allows the wave exert a velocity v + v0:

ѵ '= v + v0 / λ

ѵ '= ѵ (1 + v0 / v), for the case if it approaches it would be = ѵ (1 - v0 / v).

In the case of the Doppler effect, in the case of light, it moves with speed with its focus unlike sound, since the theory of relativity assumes two situations as physical phenomena, where they are identical but with different change relatively frequently.

ѵ '= v λ - v0 / c / √ λ - (v0 / c) ^ 2, where c is the speed, from relativistic theory, since it is the variation of frequencies, then with time served as the basis for determining the speed of stars and other celestial bodies.

From the point of view of shock wave it is a pressure wave that travels faster than the speed of sound in the same medium, through which the wave propagates, which through various phenomena produces extreme pressure differences and increase in temperature, at the level of particles in which both speeds using the model of the n Doppler effect, the focus would always be located in front of the wave, originating an enveloping wave with other successive waves with a very energetic potential power or wave ballistics.

For the case of shock waves for the case of interval, the non-spring central focus makes it singular, it moves from F1 to F4, then the emitting wave moves from F1 to A, where each one has its respective velocities For F, considering the Vf / V ratio under the Mach scheme, in the medium of sound, water, thanks to Huygens principles it explains the phenomena of diffraction, refraction and reflection in waves. Also to designate any type of wave propagation that carries, therefore, energy through a continuous medium which can be a vacuum, in such a way that its wave front involves an abrupt change in the properties of the medium is a source very powerful energy.

Sen Ⲁ = F1A / F1F4 = v.t / CF.t = V / VF

I am going to mention two very important examples of this physical phenomenon. Supersonic airplanes cause shock waves when flying above the transonic regime (M> 0.8) because there appear areas where the air exceeds the speed of sound locally, for For example, on the profile of the wing, although the plane itself does not travel at M> 1, the second case is in the field of medicine in such a way that kidney stones can be treated, where, my friend, shock wave therapy to the treatment of certain musculoskeletal processes that occur with inflammation, soft tissue calcification, chondral involvement, with the technique called lithotripsy.

[1] - Fundamentals of technical thermodynamics by Michael J. Moran, Howard N. Shapiro, 2004.