Abstract: The behavior of fluid flow has been studied during the different flowmedia over the past decades. In addition, the behavior of the flow of fluidthrough porous media has garnered much research interest. This papersheds light on fissured rocks of oil reservoir media (as one of the porousmedia domain), and the effect of these fissured on fluid flow. In thisarticle, the Finite Volume Method (FVM) has been used to visualize thebehavior of... More

Abstract: With the use of laser welding, it is possible to join different steel, withdifferent thicknesses, with or without the action of protective layers. Thequality of laser radiation makes it possible to get certain characteristics thatare impossible to get by other processes, such as high welding speeds, lessmetallurgical effects suffered by the heat-affected zone (ZAC), and thisprocess also does not require filler metal, therefore it is free from... More

Abstract: The laws of functioning of discrete deterministic dynamical systemsare investigated, presented in the form of automata models defined bygeometric images. Due to the use of the apparatus of geometric imagesof automata, developed by V.A. Tverdokhlebov, the analysis of automatamodels is carried out on the basis of the analysis of mathematical structuresrepresented by geometric curves and numerical sequences. The purposeof present research is to... More

Abstract: We apply the method of guidance by a required velocity for solving the optimal control problem over spacecraft’s reorientation from known initial attitude into a required final attitude. We suppose that attitude control is carried out by impulse jet engines. For optimization of fuel consumption, the controlling moments are calculated and formed according to the method of free trajectories together with principle of iterative control using the... More

Abstract: Graphene has remarkable strength, such as yield strength and elasticconstant. The dynamic behaviour of graphene sheet is affected bygeometrical variation in atomic arrangement. This paper introducedgraphene with armchair atomic structure for estimating fundamental naturalfrequencies. The presented analysis can be useful for the possible highfrequency nanomechanical resonator systems. The analytical formulation,based on classical plate theory and... More