The problem of bending of an infinite plate containing an array of trough closable cracks and narrow slits is considered in a two-dimensional statement. A crack is treated as a mathematical cut, the edges of which are able to contact along the line on the plate outside. A slit is referred to as a cut with contact stress-free surfaces and the negati...

By Taras M. Dalyak, Ivan P. Shatskyi

The ferrofluid flow model of the Shliomis and continuity equation for the film and porous interface with the theory of Darcy, the modified Reynolds equation for ferrofluid squeeze film between curved annular plates is discussed with the impact of the rotation of Ferro-particles and slip velocity at the boundary. Beavers and Joseph’s slip cond...

By Niru C. Patel, Jimit R. Patel

The paper develops a method for approximation of the discontinuous functions of two variables by discontinuous interlination splines using arbitrary triangular elements. Experimental data are one-sided traces of a function given along a system of lines (such data are commonly used in remote methods, in particular in tomography). The paper also prop...

By V. Mezhuyev, O. M. Lytvyn, I. Pershyna, O. Nechuiviter

The antioxidant activity of bergaptol (4-hydroxyfuro[3,2-g]chromen-7-one, BER) and xanthotoxol (9-hydroxyfuro[3,2-g]chromen-7-one, XAN) was investigated in water and benzene, as solvents. For this purpose, the density functional theory (DFT) was used. The free radical scavenging potency of investigated compounds towards different reactive oxygen sp...

By Žiko Milanović, Marko Antonijević, Jelena Đorović, Dejan Milenković

In the present paper, M05-2X/6-311+G(d,p) level of theory was used to investigate antiradical activity of cyanidin towards highly damaging radical species (.OH, .OCH3, .OOH and .OOCH3). The applied method successfully reproduces the values of reaction enthalpies (ΔHBDE, ΔHIP, and ΔHPA). These parameters are important to determine ...

By Dejan Milenković, Jelena Đorović, Edina Avdović, Žiko Milanović, Marko Antonijević

The paper presents a proposal of mathematical models for the determination of propulsion coefficient, ηpp, intended for the analysis of motor freighters applied on the river watercourses. As the main paper contribution three different model types are developed, depending on the variable which contributes to ηpp value. These variables are: 1...

By Radoslav Rajkovic, Dragan Mitic, Aleksandar Lebl, Snežana Rajkovic

Nowadays, finite element analysis is a well-assessed technique which enables investigation of blood vessels behavior under different boundary conditions. Given the rapid progression of both medical imaging techniques and computational methods, the challenge of using the simulation of human arteries such as carotid arteries to address different medi...

By Smiljana Djorovic, Igor Saveljic, Nenad Filipovic

In this paper, the effects of chemical reaction on unsteady MHD flow of viscous incompressible electrically conducting fluid past an impulsively started oscillating vertical plate with variable temperature and constant mass diffusion in the presence of Hall current have been presented. The dimensionless governing partial differential equations of t...

By B. Prabhakar Reddy, Josephat Peter

A Quick Adaptive Galerkin Finite Volume (QAGFV) solution of Cauchy momentum equations for plane elastic problems is presented in this research. A new damping coefficient is introduced to preserve the efficiency of the iterative pseudo-explicit solution procedure. It is shown that the numerical oscillations are not only effectively damped by the pro...

By Saeed Reza Sabbagh Yazdi, Tayebeh Amiri, Saeed Asil Gharebaghi

Improvement of the airfoil NACA 4415 aerodynamic performances by flow control using a passive technique was achieved in this study. Gothic-shaped vortex generators were added at the profile upper surface. Vortex Generators (VG) were used to avoid boundary layer separation at the profile trailing edge, thus reducing the drag force and improving aero...

By Hocine Hares, Ghazali Mebarki, Mourad Brioua, Mahieddine Naoun