Powder discharging from a silo provokes an emission of dust. To understand and prevent this source danger, 3D simulations discharge were performed using Euler-Euler approach. The impact the coupling between flow inside granular jet in free-fall is analyzed. Results show that solid mass rate correctly predicted gas back-flowing at hopper exhaust appears responsible for formation fluctuating radi...

introduction: dental trauma is a very significant problem in primary dentition. it has a physical, esthetic and psychological impact on the child and his/her parents. the purpose of this study was to assess the prevalence of traumatic inju ries to the anterior primary teeth and deter mining factors in 2-5-year-old children in rasht, 2012. materials and methods: this research was a cross-section...

The heat-transfer characteristics of thin film flow over a hot sphere resulting from a cold vertical jet of liquid falling onto the surface have been investigated. The underlying physical features have been illustrated by numerical solutions of high accuracy based on the modified Keller box method. The solutions for film thickness distribution are good agreement with those obtained approximatel...

The paper considers heat transfer characteristics of thin film flow over a hot horizontal flat plate resulting from a cold vertical jet of liquid falling onto the surface. A numerical solution of high accuracy is obtained for large Reynolds numbers using the modified Keller box method. For the flat plate, solutions for axisymmetric jets are obtained. In a parallel approximation theory, an advan...

We analyzed the identified hadron multiplicity predictions of the modified thermodynamical model of the multiparticle production processes with non-extensive statistic. The replacement of the standard Boltzmann exponential factor by the eventually much more slowly falling Tsallis one is suggested by the analysis of the transverse momentum distributions measured at high energies. The increase of...

Rook theory has been investigated by many people since its introduction by Kaplansky and Riordan in 1946. Goldman, Joichi and White in 1975 showed that the sum over k of the product of the (n− k)-th rook numbers multiplied by the k-th falling factorial polynomials factorize into a product. In the sequel, different types of generalizations and analogues of this product formula have been derived ...