Technical Papers and Presentations

Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Sound Cavity Acoustic Resonance Analysis of a Microspeaker - new

Z. Zhang[1], X. Deng[1]
[1]Jiangxi Lianchuang Hongsheng Electronic Co.,LTD, Nanchang, Jiangxi, China

微型扬声器音腔声谐振分析 ...

Thermo-fluid Dynamics Modelling of Hydrogen Absorption and Desorption in a LaNi4.8Al0.2 Hydride Bed

D. Baldissin[1] and D. Lombardo[1]
[1]Compumat S.r.l., Torino, Italy

A two-dimensional mathematical model for the absorption and desorption of H2 in LaNi4.8Al0.2 was developed and experimentally validated. The model is composed of an energy balance, a mass balance and a momentum balance. These differential equations are numerically solved by means of the finite element method using the software COMSOL Multiphysics®. From a comparison between theoretical ...

Motion of Uncharged Particles in Electroosmotic Flow through a Wavy Cylindrical Channel

N. Qudus[1], T. Mahbub[1], S. A. Ali[1], and M. Shajahan[1]
[1] Bangladesh University of Engineering and Technology, Dhaka Bangladesh

A finite element model is employed to describe the electric potential distribution and electroosmotic flow field inside a wavy cylindrical channel. The model uses coupled Laplace and Poisson-Boltzmann to evaluate the electric potential distribution inside the channel. It also contains continuity and Navier–Stokes equations for the solution of fluid flow. A particle trajectory model was ...

Application of System Identification Methods to Implement COMSOL Models into External Simulation Environments

A.W.M. van Schijndel[1] and M. Gontikaki[1]

[1]Eindhoven University of Technology, Eindhoven, The Netherlands

Full coupling of distributed parameter models, like COMSOL, with the lumped models often lead to very time-consuming simulation duration times. In order to improve the speed of the simulations, the idea of using system identification methods to implement the distributed parameters models of COMSOL into external simulation environments, is explored. It is concluded that the system identification ...

Underground Coal Fire Extinction Model Using Coupled Reactive Heat and Mass Transfer Model in Porous Media

S. Suhendra[1], M. Schmidt[1], and U. Krause[1]
[1]Laboratory II.2: “Flammable Bulk Materials and Dusts, Solid Fuels”, Federal Institute for Materials Research and Testing (BAM), Berlin, Germany

Green house gases emission associated with natural hazard of underground coal seam fire has been recognized as a worldwide problem leading to global warming threat. Therefore, in this paper a model to study underground coal fire is presented and the results will be devoted to strategic development of coal fire extinction technology within the framework of Sino-German Coal Fire Research ...

Analysis of Cell Deformation with FEMLAB

El-Khatib, N.1, Huc, N.2, Goldberg, Y.3, Cedex Martiel, J.L.1
1 TIMC Laboratory, UMR CNRS 5525, Faculty of Medicine, La Tronche
2 COMSOL, Grenoble
3 INSERM EMI 01-08, Grenoble University Hospital, Grenoble

We present a simplified model of biological cells including a first layer, corresponding to the membrane and the actin cortex and a second one, representing the cell cytoplasm. The membraneactin ensemble is governed by the Navier equations while the cytoplasm is assimilated to a viscous fluid, described by the Navier-Stokes system. At the inner boundary, between the cortex and the cytoplasm, ...

COMSOL Multiphysics' Utility in a Medical Device Company: Research and Development

Kalafut, J.F.
MEDRAD Innovations, One MEDRAD Drive, Indianola

This talk will highlight, through several case studies, COMSOL Multiphysics' utility as a design tool, system analysis tool, and an aid in applied research throughout MEDRAD's product development cycle (the integrated-Product Development Process™), from applied research to product validation. Specific examples shall include the analysis of a shielding design to prevent spurious interference ...

Numerical Simulations of the Navier-Stokes Problem with Hyper Dissipation

Manouzi, H.
Departement of Mathematics and Statistic, Université Laval University, Quebec, Canada

This paper proposes a numerical simulation of the incompressible viscous flows with hyper dissipation using FEMLAB. We propose two variational formulations to solve this problem: the primal and the mixed formulations. For the first one, a biharmonic formulation for the velocity and the pressure is used. The second one uses a mixed formulation where the laplacian of the velocity, the velocity ...

Finite Element Simulation of the Oscillatory Flow in a Channel with the Heat Transfer through a Hot Bump

Lee, Y.
Dep. of Engineering Sciences, Embry-Riddle Aeronautical University

The present numerical simulation investigates the time-dependent flow driven by the oscillatory pressure gradient in the streamwise direction. An attempt was made to obtain the flow field that is initially stationary and evolves to the purely oscillatory flow with zero mean velocity, and the results after several cycles of oscillation are compared with the long-time analytical solution in the ...

FEMLAB Modeling of Multiple Crack Systems

Grechka, V.1, Kachanov, M.2
1 Shell E & P, Houston, TX
2 Department of Mechanical Engineering, Tufts University, Medford, MA

Almost ubiquitous presence of fractures in the earth and their tendency to provide natural pathways for flow of hydrocarbons makes them an important target in exploration for oil and gas. While typical geophysical (mainly seismic) data indicate only relatively large faults, information about many small fractures of exploration interest has to be inferred from seismics by applying some effective ...

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