This paper presents the implementation of eXtended Finite Element Method (XFEM) in general-purpose commercial software COMSOL Multiphysics for first time. An enrichment strategy is proposed, consistent with structure software. To this end, each set functions, an additional Solid Mechanics module incorporated into numerical framework, coupled compatible modifications to internal variables. The L...

Abstract We deduced the reaction kinetic equation of negative electrode zinc and oxygen at room temperature, solid-state kinetics AgO silver, established corresponding COMSOL model, verified simulated storage discharge predicted that life zinc-silver reserve battery is about 18-20 years.

Solar drying remains for developing African countries the only economical means of preserving foodstuffs which post-harvest losses sometimes reach 60%.
 It was modeled in this work, different elements that constitute a solar system by natural convection. This model is described heat, mass and momentum balance equations between exchange media.
 The initially made it possible to describ...

This master thesis focused on optimizing the outlet geometry of microcolumn chips and how the chips are assembled in a miniaturized gas analysis system based on the principles of gas chromatography. The theory and literature of gas chromatography at microscales was studied and consequently several outlet designs were simulated with COMSOL Multiphysics®. Their theoretical velocity profiles were ...

MEMS Accelerometer, the new inventions which revolutionized the technical world. Now, it’s time for the self assistive accelerometers. In this paper, we have designed the trampoline, annular diaphragm structured piezoelectric accelerometers using PZT-5H with COMSOL Multiphysics software tool for providing low transverse sensitivity along one axis and good temperature stability. These accelerome...

The existing lithium ion battery model in Multiphysics (MP) software (COMSOL Inc., Palo Alto, CA) is extended to include the thermal effects. The thermal behavior of a lithium ion battery is studied during the galvanostatic discharge process with and without a pulse. ccepted 8 March 2011 vailable online 15 March 2011 eywords: ithium ion battery hermal model © 2011 Elsevier B.V. All rights reser...

This paper propose a new design and analysis of MEMS sensor array based on thermal stress and electric current properties. The COMSOL Multiphysics 4.3 software is used to design the sensor array of the sensing layer. The material selection is done based on the thermal analysis of the sensor array. The polysilicon yield a maximum displacement of 0.00143μm and also it is suitable for human skin. ...

Dielectrowetting effects of surface wrinkling, isotropic vs anisotropic spreading, electrode geometry, and deterministic dewetting are presented both experimentally and by 3D numerical modeling. The numerical results are generated by COMSOL in conjunction with the phase-field and electrohydrodynamic methods, including comparisons to experimental data. The dynamic behavior of the two-phase syste...