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

The present investigation represents a study on the effects of heat and mass transfer flow in the presence of couple stress coefficient, heat source parameter, radiation parameter, chemical reaction parameter and Schmidt number using nanofluids over a stretching sheet. The governing partial differential equations are reduced to ordinary differentia...

By Meruva Parvathi, Appikatla Leela Ratnam, Malaraju Chengal Raju

  Calendering is programmed finishing technique in the textile industry where the texture is squeezed between two or more rolls with a goal to obtain desired fragile quality, radiance and translucency. The essential guideline of calendering is to open the material to the joined impact of dampness, warmth and weight until the point texture gai...

By Neelam Gupta, Neel Kanth

The most important characteristics of the electrospun fibers are their internal morphology and their diameter. They both depend on polymer’s parameters, but also on the process parameters. The motivation for this research is therefore to simulate the jet during electrospinning and analyze the effects of some of the parameters on the jet (and ...

By Ilektra Ferouka, Tijana Šušteršič, Marko Živanović, Nenad Filipovic

In this paper, the behavior of a valveless, diaphragm-founded, piezoelectric micropump is studied and simulated. The nature of the piezoelectric actuator is a PZT-5H piezo-disk and the diaphragm is made of Silicon dioxide (SiO2). Applying Fluid-Structure Interaction (FSI) approach, the simulation for the valveless micropump is carried out in COMSOL...

By Toufik Barkat, Fatima Yohra Kadid, Mohammed Salah Aggoune, Rachid Abdessemed

The Hip resurfacing prosthesis is subjected to different stresses resulting from the different positions of the human walk, thereby generating dynamic stresses that vary with time, leading the implant material to fatigue failure. It is important to study the fatigue behavior of the prosthesis material and to ensure its long lifetime. We proposed a ...

By Karima Chergui, Hacene Ameddah, Hammoudi Mazouz

A generalization of the smeared concept for field problems, published in recent papers of the author and his collaborators, is presented in the paper. A composite smeared finite element CSFE is formulated. This generalization can serve as a theoretical background for further applications. A selected numerical example, related to convective-diffusiv...

By Milos Kojic

In this paper, we propose a method and a mathematical model for solving the problem of cargo transportation on a suspension rope by a bridge crane following a predetermined trajectory in the absence of uncontrollable pendulum sways. To this end, the principle of reduction of the second-order linearized differential equation, which describes sways i...

By Mikhail S. Korytov, Vitaly S. Shcherbakov

In this paper, a numerical algorithm is presented to simulate the three-dimensional transient incompressible flow using a meshless local Petrov-Galerkin (MLPG) method. In the proposed algorithm, the forward finite difference (FFD) and MLPG methods are employed for discretization of time derivatives and solving the Poisson equation of the pressure, ...

By Mohammad Javad Mahmoodabadi, F Mahmoodabadi, Meysam Atashafrooz

In this paper, the theory of the Lagrange polynomial approximation of a directly non-measurable characteristic of an element of a mechanical structure by means of an information-measuring system of numerical differentiation is refined. It is shown how to obtain the maximal accuracy of approximation on the basis of the theory of inverse problems and...

By Askold P. Loktionov