What are shock waves mention the characteristics and application of shock waves?
2.1 Characteristics of shock waves Shock waves can be considered to be one kind of stress waves. Like an ordinary stress wave, a shock wave carries energy and can propagate through a medium such as solid, liquid, or gas. A shock wave has the following characteristics: It has an almost vertical front.
Why are shock waves important?
The schlieren and shadowgraph techniques used to image shock waves are vital tools for visualizing flows that have a different refractive index than the surrounding air, and therefore bend light.
What are the applications of low energy waves?
Low-energy shock wave therapy has been used clinically with musculoskeletal disorders, ischemic cardiovascular disorders and erectile dysfunction, through the mechanisms of neovascularization, anti-inflammation and tissue regeneration.
What are the types of shock waves?
One can imagine two types of shock waves: (positive) compression shocks which propagate into the direction where the density of the gas is a minimum, and (negative) rarefaction waves which propagate into the direction of maximum density.
What is an example of a shock wave?
Some common examples are supernovae shock waves or blast waves travelling through the interstellar medium, the bow shock caused by the Earth’s magnetic field colliding with the solar wind and shock waves caused by galaxies colliding with each other.
What are shock waves in engineering physics?
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 unusually large amplitude called a “shock wave”.
Why are shock waves created?
Shock waves are formed when a pressure front moves at supersonic speeds and pushes on the surrounding air. Shock waves are not conventional sound waves; a shock wave takes the form of a very sharp change in the gas properties. Shock waves in air are heard as a loud “crack” or “snap” noise.
What are shock waves in geography?
A shock wave is an area of very high pressure moving through the air, earth, or water. It is caused by an explosion or an earthquake, or by an object travelling faster than sound. The crime sent shock waves throughout the country.
Which wave has highest frequency?
Gamma rays have the highest energies, the shortest wavelengths, and the highest frequencies. Radio waves, on the other hand, have the lowest energies, longest wavelengths, and lowest frequencies of any type of EM radiation.
What is an example of a wave with a long wavelength and low frequency?
Frequency is measured in hertz (waves per second). For each type of wave, a longer wavelength means a lower frequency – for electromagnetic waves, for example, microwaves have a much lower frequency than UV waves.
What are the characteristics of shock waves?
Like an ordinary wave, a shock wave carries energy and can propagate through a medium but is characterized by an abrupt, nearly discontinuous, change in pressure, temperature, and density of the medium.
What are shock waves How are they produced?
Shock waves are large amplitude pressure waves produced by an object moving faster than the speed of sound like a boat or plane, or other things such as an explosion, lightning or even a moving piston.
What are shock waves used for in orthopaedics?
Shock waves subsequently have been used in orthopaedics and traumatology to treat various insertional tendinopathies (enthesiopathies) and delayed unions and nonunions of fracture. Shock wave application also has been used in the treatment of tendinopathies in veterinary conditions (race horses).
Do shock waves have any destructive effects?
All types of the mentioned shock waves can have destructive effects and steps must be undertaken to minimize them. An excellent survey of shock wave phenomena is given by I. I. Glass (1991). From the theoretical point of view shock waves are a good example of a nonlinear wave propagation.
Can shock waves be used for kidney stones?
Shock waves have become the treatment of choice for kidney and ureteral stones. Urology, however, is not the only medical field for the potential use of shock waves for problems.
How are shock waves transmitted over long distances?
An earthquake (macroscopic) and the collapse of gas bubbles in a liquid (microscopic) generate shock waves. By means of shock waves, energy can be transmitted over extensive distances. An airplane breaking the sound barrier generates a very loud, audible bang, which can lead to the jingle or breakage of glasses in a faraway cupboard.