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.


张春 [1], 朱铧丞 [1], Ashim Datta [1],
[1] 四川大学,成都,四川,中国

引言:微波干燥过程涉及多物理场的耦合,物理过程十分复杂。不仅有被加热物质的形态改变,还有气态、液态和固态三相的相互作用。为了更清楚地理解微波干燥过程,本模型将电磁场、多相流和物理变形用相应的方程耦合到一起建模分析,并用相应的物理参数表征微波干燥过程。(图1) COMSOL Multiphysics® 的使用:借鉴微波加热接口土豆模型,添加气体和固体传热接口以及自定义方程,用方程和参数实现多物理场耦合。实验模型中,干燥物为土豆,且被视为多孔弹性介质。物质变形用相应的矩阵来表征。 结果:在仿真结果的基础上,利用家用微波炉干燥土豆,设计实验,并测量了微波干燥过程中的重要物理参数,如温度、水分和形变。(图2,图3) 结论:该仿真模型和实验基本吻合 ...

3D Modeling of Hydrogen Absorption in Metal Hydride Hydrogen Storage Bottles

R. Busqué [1], R. Torres [1], A. Husar [2], J. Grau [1]
[1] Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona, Barcelona, Spain
[2] Institut de Robòtica i Informàtica Industrial CSIC-UPC, Barcelona, Spain

The storage of hydrogen as an absorbed element in metal hydride bottles is a promising technique for energy storage. In this work, a three-dimensional model of a charging process in a metal hydride container has been developed to simulate the absorption reaction and resultant heat and mass transport phenomena in metal hydride vessels. The model has been experimentally validated showing a good ...

A Model Coupling Water Transport with Local Deformation and Polymer Phase Transition

A. Briffaz [1], J. M. Méot [2], P. Bohuon [3], C. Mestres [2], B. Matignon [2], M. Dornier [3]
[1] CIRAD, Montpellier, France
[2] CIRAD, Montpellier, France
[3] Montpellier SupAgro, Montpellier, France

Describing and predicting the extent of the physicochemical processes as well as geometrical deformation taking place during food transformation is of major importance to control food functional properties. Unfortunately, only a few food-matrix models consider deformation particularly because of large deformation. In the case of a starchy product such as rice, water transport and swelling ...

Análise de Influência da Utilização de Propriedades Termodependentes na Simulação de Juntas Soldadas

A. A. S. B. Cruz [1], N. S. B. da Silva [1],
[1] Universidade Federal de Pernambuco, Recife, PB, Brasil

Visando minimizar os cálculos envolvidos em simulações numéricas de juntas soldadas e diminuir a quantidade de informações necessárias, busca-se fazer simplificações que não tenham influências consideráveis nos resultados. Para o presente trabalho, analisou-se, através do COMSOL Multiphysics, o impacto das propriedades dos materiais dependentes da temperatura neste tipo de simulação. Para ...

The Use of COMSOL in Teaching Heat and Moisture Transport Modeling in Building Constructions

A.W.M. van Schijndel[1] and H.L. Schellen[1]
[1]Eindhoven University of Technology, Eindhoven, The Netherlands

This paper presents the use of the multiphysics package COMSOL for teaching heat and moisture transport modeling in the research area of building physics. It includes a description on how COMSOL works and six exercises with 2D, 3D, steady state and transient models. It is concluded that COMSOL is a very useful tool for this kind of engineering education. Especially, the abstraction level of ...

Heat Loss Evaluation of an Experimental Set-up for Predicting the Initial Stage of the Boiling Curve for Water at low Pressure

K. T. Witte[1], F. Dammel[2], L. Schnabel[1], and P. Stephan[2]
[1]Fraunhofer Institut Solare Energiesysteme - Department of Thermal Systems and Buildings, Freiburg, Germany
[2]Technische Universität Darmstadt - Institute of Technical Thermodynamics, Darmstadt, Germany

In this paper heat losses and gains are assessed for a specific measuring set-up improving the validity of performance data to accurately predict the initial stage of a boiling curve. Simulation focus on achieving results predicting real measuring data of a plain surface structure. Therefore, the relevant components of the measuring set-up have been implemented in a 2-D axisymmetric model ...

Thermal Analysis for the Solar Concentrating Energy and Induction Heating for Metals

A. Rojas-Morín[1], Y. Flores-Salgado[2], A. Barba-Pingarrón[1], R. Valdéz-Navarro[1], F. Mendéz[1], O. Alvarez-Brito[3], M. Salgado-Baltazar[1]
[1]Facultad de Ingeniería, Universidad Nacional Autónoma de México, Ciudad Universitaria, D.F. México
[2]DGTIC, Universidad Nacional Autónoma de México, Ciudad Universitaria, D.F. México
[3]Programa de Posgrado en Ingeniería, Universidad Nacional Autónoma de México.

In this paper, we simulated the heating of a work piece by coupling two heat sources. Concentrated solar energy was applied at the bottom of the work piece, which generated a heat flux from the parabolic solar dish concentrator. Subsequently, induction heating was applied, which generated Eddy currents that circulated through the work piece and heated the surface of the material. A numerical ...

Simulation and Experimental Validation of Direct Heating of Dhruva Fuel Rod for β Heat Treatment - new

B. Patidar, A. P. Tiwari[1], V. Patidar[1], M. M. Hussain[1], K. K. Abdulla[1]
[1]Bhabha Atomic Research Centre, Mumbai, Maharashatra, India

β heat treatment of Uranium rods is carried out for randomization of oriented grains (called texture) developed during hot rolling or hot extrusion operation. During this process, Uranium rods undergo heating of up to 740 Deg C followed by water quenching. The objective of this work is to see the feasibility of direct heating technique for heat treatment application. At present, heat treatment ...

Multi-Dimensional Adsorption Model of CO2/H2O Sorbent Bed

C. Gomez [1], R. F. Coker [1], J. Knox [1], G. Schunk [1]
[1] NASA MSFC, Huntsville, AL, USA

The primary interest of the VC (Vacuum Characterization) test is to experimentally characterize the adsorption and vacuum desorption of CO2 and water vapor of a pelletized sorbent bed in a large diameter column. The VC test article is shown in Figures 1 and 2. The aluminum canister is 3” in diameter and approximately 8” long allowing for variable sorbent bed loads from 1” to 6” in length. A ...

Modeling System Dynamics in a MEMS-Based Stirling Cooler

D. Guo, A. McGaughey, G. Fedder, M. Lee, and S. Yao
Carnegie Mellon University
Pittsburgh, PA

Micro-scale devices based on the Stirling cycle are an attractive choice for chip- and board-level electronics. A new Stirling cycle micro-refrigeration system composed of arrays of silicon MEMS cooling elements has been designed. COMSOL is used to evaluate the thermal performance of the system. Simulation of compressible flow and heat transfer with a large deformed mesh has been successfully ...