Articles techniques et présentations

The electric field plays a very important role in the electrospinning process, which needs to be seriously considered in the electrospinning configuration developing. High voltage involved in electrospinning process leads to difficulty in measuring the electric field. Numerical ... En savoir plus

Linear motor has a lot of applications, such as magnetic levitation train, electromagnetic weapons. It is a very important research significance. We established a three-dimensional model of linear motor to calculate the magnetic field lines and flux density distribution, and got the ... En savoir plus

Vertical axis wind turbine has low rotation performance compared with that of horizontal axis wind turbine. This study proposes a new blade shape for vertical axis wind turbine effective for wide range of wind speed. Results obtained from a numerical COMSOL simulation and wind tunnel ... En savoir plus

This presentation deals with a density based topology optimization for multiphysics problems implemented in COMSOL Multiphysics. Using this method, we are going to design a heat exchanger for maximizing the performance under a constant input power. En savoir plus

The reciprocating paddle cell is a known practical method for depositing alloy films on wafer substrates. Recently, the mass transfer boundary layer within an industrial wafer plating cell was studied based on the measurement of limiting current. It was indicated that a shear-plate fluid ... En savoir plus

This paper introduces the concept, research methods and application of photonic crystals. Starting from Maxwell's equations, the functional form of the TE mode and TM mode of the 2D crystal is derived. In 2D crystal, according to the functional forms, we conduct some stimulation about ... En savoir plus

With this presentation, some content has been discussed from several parts as follows: 1. Plasma switches are introduced by their derivation and types, and the operating mechanism of Hydrogen cross field plasma switch is indicated then. 2. The related theories of Hydrogen plasma to ... En savoir plus

In recent years, optical manipulation using optical radiation pressure has been widely studied. In this study, the radiation pressure exerted on various kinds of microscopic objects with different laser beams was evaluated by COMSOL Multiphysics software. By changing beam shapes, ... En savoir plus

When a wineglass is touched with a wet finger along its edge, it vibrates at single frequency and you hear a clear sound. If the water is added into the glass, the sound pitch changes because the resonance frequency changes with the mass of the glass. When there are plural glasses with ... En savoir plus

It is a complex problem to calculate the photonic crystal fiber model, and the methods of plane wave expansion, Hermite-Guasssian function and beam propagation have been analyzed. Finally the multipole method is adopted for solving problem. The hexagonal air holes in cladding have been ... En savoir plus