Topic
Rarefaction
About: Rarefaction is a research topic. Over the lifetime, 1852 publications have been published within this topic receiving 26943 citations.
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TL;DR: In this article, an accelerated discrete velocity method is presented for rarefied three-component gas mixtures flowing through long rectangular ducts, based on the McCormack linearized kinetic model.
6 citations
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21 Jul 2017
TL;DR: In this paper, the concepts of π-mixed geometric and π mixed binomial distributions are introduced within the setting of Bernoulli trials with a random probability of success, and a generalization of the Renyi theorem concerning the asymptotic behavior of rarefied renewal processes is proved for doubly stochastic rarefaction.
Abstract: In the paper, the concepts of π-mixed geometric and π-mixed binomial distributions are introduced within the setting of Bernoulli trials with a random probability of success. A generalization of the Renyi theorem concerning the asymptotic behavior of rarefied renewal processes is proved for doubly stochastic rarefaction resulting in that the limit process is mixed Poisson.
6 citations
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TL;DR: In this article, the rarefaction waves appear when the velocity of the contact boundary decreases below the sound velocity in the target material and the shock waves emerge at the free surface.
Abstract: The dynamic damage during cavitation erosion is of a spall nature and results from the interference of rarefaction waves. Spherical shock waves, which arise due to the collapse of cavitation bubbles, generate shock waves in the target. The rarefaction waves appear when the velocity of the contact boundary decreases below the sound velocity in the target material and the shock waves emerge at the free surface. The coordinate of the rarefaction wave formation site determines the zone of potential damage. The interference of rarefaction waves creates the spall channel crack, near which the coaxial cylindrical cracks are formed-as a rule, in the dynamic fatigue regime-in the course of subsequent loading.
6 citations
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TL;DR: In this paper, an analysis of the results of a three-dimensional numerical simulation of the flow in a conical shock tube (CST) with an angle of 38° revealed that the blast waves formed in such a tube have a pressure profile similar to spherical shock waves (SSWs) with a pronounced rarefaction phase following the compression phase.
Abstract: An analysis of the results of a three-dimensional numerical simulation of the flow in a conical shock tube (CST) with an angle of 38° revealed that the blast waves formed in such a tube have a pressure profile similar to spherical shock waves (SSWs) with a pronounced rarefaction phase following the compression phase. It is established that the main difference between the flow in conical geometry and the spherical case is related to the change in the flow parameters due to the interaction with the bounding surface(cone wall). The revealed inhomogeneity of the flow manifests itself in the form of pressure pulsations in the rarefaction phase in the absence of a secondary compression phase. It is concluded that a CST is an effective tool for reproducing dynamic loads under a spherical explosion.
6 citations