In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.
COMSOL-News-Magazine-2017
COMSOL-News-Magazine-2017-Special-edition-acoustics
COMSOL-News-Magazine-2016

Development of a Microfluidic-Based Electrochemical Cell for Analyzing Bacterial Biofilms

I. Claydon [1], J. Turner [1], B. Sammakia [1],
[1] Binghamton University, Binghamton, NY, USA

The ubiquitous nature of biofilms has led to a growing need to be able to detect, control, and maintain or remove them. Therefore a robust testing platform that allows for multiple analytical techniques is required to better understand their multitude of properties. The development of the self-contained microfluidic-based electrochemical cell portion of a multifaceted analysis system is ...

3-D COMSOL Analysis of Extruder Dies

E. Solomon[1] and V. Mathew[1]
[1]Arcada University of Applied Sciences, Espoo, Finland

Three-dimensional flow analysis was performed by using COMSOL Multiphysics Chemical Engineering Module for the purpose of analyzing the flow properties and finding out the operating points of a test domain. Using material property table for an exemplary melt of LDPE (Low-Density Polyethylene), the logarithmic viscosity-shear rate graph was plotted and fitted to the 4–constant modified Carreau ...

Multiphysics Modeling of a Metal Foam

B. Chinè [1][3], M. Monno[2]
[1]Laboratorio MUSP, Macchine Utensili e Sistemi di Produzione, Piacenza, Italy
[2]Politecnico di Milano, Dipartimento di Meccanica, Milano, Italy
[3]Instituto Tecnologico de Costa Rica, Cartago, Costa Rica

Introduction: In metal foams production, nucleated gas bubbles expand in a heated metal in a mold, then the foam cool and solidify. Thereby energy, mass and momentum transfer mechanisms are present simultaneously in the system and must be taken into account. Metal foam (Figure 1) can be obtained by foaming a precursor, i.e. a mixing of aluminum (Al) powders with the blowing agent TiH2, placing ...

Thermo-Fluid Dynamics FEM Simulation of Advanced Water Cold Plates for Power Electronics

N. Delmonte[1], F. Giuliani[1], P. Cova[1]
[1]Dipartimento di Ingegneria dell'Informazione, Università degli Studi di Parma, Parma, Italy

Introduction: Power electronic converters such as those for High Energy Physics Experiments (HEPEs) must operate in thermally hostile environment. Heat generated by electronics components must be conveniently dissipated to ensure electrical performances and improve reliability. Due to the high power density, the presence of closed environments, and the requirement of non-thermal interaction with ...

Numerical Investigation for the Effect of Guide Panel on Heat Transfer from Steel Containment

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

In a nuclear reactor, the containment is the last barrier for the release of radioactivity during severe accident conditions. Containment material can be concrete or steel or steel-lined concrete. Steel containments have a high load bearing capacity and a high degree of leak tightness at higher pressures. In case of a severe accident, heat can be removed from the containment by a guide panel, ...

Cooling Study of Baffles Integration in the Molding Industry

B. Noailles [1] , S. Meunier [1], V. Bruyere [2]
[1] RocTool, Savoie Technolac, Module R, France
[2] SIMTEC, France

In the molding industry, high productivity rate, low energy consumption, large 3D parts, and homogeneous temperature distribution are the main targets. The 3iTech® inductive technology developed by RocTool ensures both good temperature homogeneity and short heating time. Conventionally, to guarantee efficient cooling, a turbulent water flow is directly integrated into the mold. Ideally, to cope ...

基于 COMSOL 的激光抛光过程仿真与机理分析

沈洪 [1],
[1] 上海交通大学,上海,中国

作为一项重要的材料表面处理技术,抛光直接影响着材料表面粗糙度等表面质量评价参数。随着微纳技术和精密制造的发展,工业应用中对材料表面粗糙度的要求越来越高,对抛光技术的综合要求也随之越来越高。然而,一些传统抛光方法的弊端日益凸显,无法再满足工业需要。激光抛光作为一种非接触式抛光技术,避免了传统抛光技术的磨痕,作用区域可控,可以对选定的区域进行局部抛光,也可以对复杂结构、机械不可达或难接近结构进行抛光。本文基于传热学和流体力学的基础理论,利用多物理场耦合有限元软件 COMSOL Multiphysics®,建立激光抛光过程的热-流-自由液面变形有限元模型,分析了表面张力和 Marangoni 效应对自由液面变形的影响规律,阐明激光抛光的主导机制。

Helium Two-Phase Flow in a Thermosiphon Open Loop

B. Baudouy[1] and F. Visentin[1]
[1]CEA, Irfu, SACM, Gif-sur-Yvette, France

The construction of high magnetic field superconducting coils requires the use of low temperature superconductors that must be cooled down to liquid helium temperature (4.2 K). Natural two-phase convection loops, i.e. thermosiphon loop, are used as cooling system for large superconducting magnets mainly because of its passive nature. The study present a thermohydraulics model realized with ...

Groundwater Modeling as an Assessment Tool for Underground Mines Located in Fractured Massifs

J. Font-Capó[1], A. Nardi[1], M. Mendoza [2], E. Ruiz[2], S. Jordana[1], J. Molinero[1], P. Trinchero[1], J. Vargas[3]
[1]Amphos 21 Consulting, Barcelona, Spain
[2]Amphos 21 Perú, Lima, Perú
[3]Worley Parson/TWP, Lima, Perú

Some of the present metallic ores mines are located in areas formed by a heterogeneous fractured massif where groundwater flows preferentially through fractures. Underground mining in these zones can cause impacts in streams, lakes and change the natural water balance of the watersheds, leading to conflicts between traditional uses of water and the mining activity. Quantification of these ...

Virtual Pharmacokinetic Model of the Human Eye - new

L. Murtomäki[1], S. Kotha[2]
[1]Aalto University, Greater Helsinki, Finland
[2]University Of Helsinki, Helsinki, Finland

There is a great need for an effective drug treatment of the posterior eye, as the major reason for visual disability in industrial countries is Age-related Macular Degeneration (AMD). In USA alone, there are almost 2 million people affected by AMD [1]. A virtual pharmacokinetic 3D model of the human eye is built to address this problem, using COMSOL Multiphysics® software, based on the Finite ...