Presence of salts in water has been one of the biggest problems of industrial equipment such as evaporators, boilers, and pipes. These salts gradually form scales on evaporators and boilers tubes and reduce their efficiency. Pretreatment processes are conducted to remove these salts; with sedimentation tanks being one of the essential equipment used in these processes. This study numerically si...

Discrete Event Systems Specification (DEVS) formalism has been used in recent decades for modeling and simulation of discrete event systems as well as for some hybrid systems, since it has a sound semantics for modular hierarchical semantics and good simulation development environments. Nevertheless there are still deep gaps in understanding between the formalism and the practical modeling of l...

Hidden Markov Model is a popular statisical method that is used in continious and discrete speech recognition. The probability density function of observation vectors in each state is estimated with discrete density or continious density modeling. The performance (in correct word recognition rate) of continious density is higher than discrete density HMM, but its computation complexity is very ...

The purpose of this study is to identify parameters influence on the particle deposition within fin and tube heat exchanger of air-conditioning systems by CFD analysis. First the basic sketch of periodic geometry drawn and meshing operation including boundary conditions was performed. Then the gas side properties and flow parameters were solved by ANSYS Fluent 14.5 software. Lagrangian equa...

Wave self-focusing in molecular systems subject to thermal effects, such as thin molecular films and long biomolecules, can be modeled by stochastic versions of the Discrete Self-Trapping equation of Eilbeck, Lomdahl and Scott, and this can be approximated by continuum limits in the form of stochastic nonlinear Schrödinger equations. Previous studies directed at the SNLS approximations have ind...

A multiscale approach to discrete element modeling is presented. distinctive feature of the method that each macroscopic has an associated atomic sample representing material’s structure. The dynamics elements on macro and micro levels are described by systems ordinary differential equations, which solved in a self-consistent manner. full cycle simulations applied polycrystalline silicon. Macro...

induction motor especially the squirrel cage type of this motor plays important role in industry. according to the application type, this motor place against various stresses that are caused failure in the motor. the most common failure is related to the stator winding. among these failures are turn-to-turn, coil-to-coil and phase to phase faults. flow the high current do to the induction resul...

The Heterogeneous Modeling and Design (HMAD) project is a 2 phase, 36 month, Defense Advanced Research Project Agency (DARPA) sponsored program to develop a design methodology, and associated modeling software, for composite, heterogeneous systems. Such systems combine diverse implementation technologies, including microelectromechanical systems (MEMS), microwave circuits, analog circuits, digi...

We consider the dynamics of a variable optical prism based on Pancharatnam phase. The device basics, using liquid crystals (LCs) as the electro-optical material, have been previously proposed. In this paper, we study the dynamics of discrete changes in the phase profile, and also continuous changes in the phase profile through acquired data and numerical modeling. We show that a design based on...