Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Impact of Electrode Surface/Volume Ratio on Li-ion Battery Performance - new

S. Das[1], J. Li[2], R. Hui[1]
[1]University of Kansas, Lawrence, KS, USA
[2]Kansas State University, Manhattan, KS, USA

The adoption of micro- and nanostructured electrodes is a promising technique to improve the performance of Li-ion battery, which increases the electrode surface area and improves the efficiency of ion exchange between the electrode and electrolyte. This performance improvement is supported by the results of our numerical simulation based of a Li+ battery in COMSOL Multiphysics® software. The ...

Enthalpy Porosity Method for CFD Simulation of Natural Convection Phenomenon for Phase Change Problems in the Molten Pool and its Importance during Melting of Solids

Priyanshu Goyal[1], Anu Dutta[1], V.Verma[1], I. Thangamani[1], R.K. Singh[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

Shielded transportation casks are commonly used for transportation and storage of radioactive waste materials. Design approval of such casks by regulatory authority is subject to its compliance with a thermal test (among other tests) Due to exposure of cask to fire , there is a possibility of melting of the shielding material (lead) used for the cask and need to evaluate extent of melting. ...

Numerical Computation of Two-Phase Flow in Porous Media

D. Droste[1], F. Lindner[1], C. Mundt[1], M. Pfitzner[1]
[1]Universität der Bundeswehr, Munich, Bavaria, Germany

In this study we investigate the heat and mass transfer in a porous media with phase change. The liquid fluid is injected from one side and heated from the other side, where it leaves the porous material in a gaseous state. Dominant forces are capillary interactions and two-phase heat conduction. To model the process we use a two-phase mixture model on a macroscopic scale. This model is ...

Numerical Prediction of Weld Bead Geometry in Plasma Arc Welding of Titanium Sheets - new

V. Dhinakaran[1], S. Khope[1], N. S. Shanmugam[1] , K. Sankaranarayanasamy[1]
[1]National Institute of Technology, Tiruchirappalli, Tiruchirappalli, Tamil Nadu, India

Plasma Arc Welding (PAW) is one of the important arc welding processes commonly used in electronics, medical, automotive and aerospace industries due its high accuracy, finishing, and ability of welding any hard materials. It is an extension of Tungsten Inert Gas welding (TIG or GTAW). PAW has been unnoticed because it is more complex and requires more expensive equipment compared to other ...

Modeling of a Magnetocaloric System for Electric Vehicles

A. Noume[1], C. Vasile[1], M. Risser[1]
[1]National Institute of Applied Science (INSA), Strasbourg, France

In automotive industry, regardless the type of engine we use, heating and air-conditioning is responsible for the highest energy consumption among all the auxiliary systems all over the year. For conventional vehicles with thermal engines, the heating of the internal space is easy obtainable because of the heat waste from the engine. For the electric vehicles, as the energy is delivered by the ...

Stefan's Problem: Validation of a One-Dimensional Solid-Liquid Phase Change Heat Transfer Process

D. Groulx, and W. Ogoh
Dalhousie University, Halifax, NS, Canada

A 1D phase change problem, known as Stefan’s problem, for which analytical solutions are available, is solved as a 2D problem using COMSOL Multiphysics. The PCM medium is semi-infinite, initially solid at its melting temperature Tm, and at t = 0, the wall temperature is raised to Tw > Tm, prompting the PCM to start melting, from pure conduction, in a linear fashion starting at x = 0. The length ...

Food Cooking Process. Numerical Simulation of the Transport Phenomena

B. Bisceglia[1], A. Brasiello[1], R. Pappacena[1], R. Vietri[1]
[1]University of Salerno, Department of Industrial Engineering, Fisciano (SA), Italy

Aim of the study is to determine the influence of some of the most important operating variables, especially humidity and temperature, of drying air on the performance of cooking process of pork meat. The process is simulated using finite elements software COMSOL Multiphysics®. The proposed model considers two geometries: cylindrical and parallelepiped, with fixed physical properties and ...

Dimensionless versus Dimensional Analysis in CFD and Heat Transfer

H. Dillon[1], A.F. Emery[1], A. Mescher[1], and R.J. Cochran[2]
[1]University of Washington, Seattle, WA, USA
[2]Applied CHT, Seattle, WA, USA

Students in engineering and science are often exposed early in their studies to non dimensional analysis. When it comes to solving fluid flow/heat transfer problems, many solutions, particularly industrial ones, are based on finite element/finite volume using dimensioned quantities. In order to compare to reference information one would like to use codes like COMSOL Multiphysics to solve non ...

Power Transistor Heat Sink Design Trade-offs

T. Eppes, I. Milanovic, and G. Quarshie
University of Hartford
West Hartford, CT

Power transistors require heat sinks to dissipate thermal energy and keep junction temperatures below the recommended limit. The reliability and longevity of any semiconductor device is inversely proportional to the junction temperature. Hence, a significant increase in reliability and component life can be achieved by a small reduction in operating temperature. A range of heat sink designs ...

Pre-clinical Modelling and Simulation of Hepatic Radiofrequency Ablation

S. Singh [1], R. Repaka [1], ,
[1] Indian Institute of Technology Ropar, India.

Radio-Frequency ablation (RFA) has received a considerable interest as a minimally invasive treatment technique used for destruction of a variety of primary and metastatic hepatic tumors. A parametric study of hepatic radio-frequency ablation using three-dimensional numerical models has been done in order to determine the optimal value of applied energy (in terms of power and treatment time) ...