نتایج جستجو برای: dust acoustic wave
تعداد نتایج: 330408 فیلتر نتایج به سال:
The head-on collision between two dust-acoustic solitary waves in an unmagnetized dusty plasma is investigated, including consideration of the dust charge variation. By using the extended Poincaré-Lighthill-Kuo perturbation method, the analytical phase shifts following the head-on collision are derived. The effects of the ratio of ion temperature to electron temperature, the ratio of the number...
this paper concerns with the modeling and construction of a fifth order method for two dimensional acoustic wave equation in heterogenous media. the method is based on a standard discretization of the problem on smooth regions and a nonstandard method for nonsmooth regions.the construction of the nonstandard method is based on the special treatment of the interface using suitable jump condition...
Brief policy The studies reviewed in this section are from PubMed, ISI, Science Direct, Google Scholar, and Scopus databases using the following keywords: dust storm, meteorological elements, temperature, heat wave, cold wave, relative humidity, wind blow, atmospheric pressure, cardiovascular diseases, respiratory diseases, cerebrovascular diseases, myocardial infarction (MI), stroke (CVA), l...
Oily fine particles are an important air pollutant in industrial environments. Workers exposed to oil mist for a long time face great health risks. Particle growth pretreatment is technical principle increase particle size and improve purification efficiency. Acoustic waves commonly used acheive growth, large number of acoustic wave agglomeration experiments have been carried out on non-oil fog...
Particulate separation has many applications in medicine, biology and industry. In this research, the separation of polystyrene particles with a diameter of 10, 20 and 30 μm in the fluid flow of a microchannel is investigated. The microchannel consists of a spiral region and a straight region under the influence of acoustic waves. In the spiral region, the particles under hydrodynamic effects u...
Our research efforts concentrate on focusing photon and sound into sub-wavelength scales. While we emphasize on new insights of material and device design from fundamental approaches, we also actively pursue the applications of our technology in the areas of nanofabrication, energy conversion, communication, and biomedical imaging. Acoustic metamaterials promise new applications for steering an...
The multi-chamber reactive silencers are widely used to reduce engine exhaust noise as well as blower intake and discharge noise. Davis et al. [1] developed a one-dimensional analytical approach, which assumes plane wave propagation in the axial direction in silencers, to predict the acoustic attenuation performance of double expansion chamber reactive silencers, and compared the predictions wi...
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