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.

Thermal Simulation of FCBGA Package with Heat Sink

M. R. Naik[1]
[1]Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka, India

In a modern IC design, the capability of predicting the temperature profile is critically important as well as cooling and related thermal problems are the principal challenges. To address these challenges, thermal analysis must be embedded within IC synthesis. This paper presents thermal analysis of the FCBGA chip with a 4mm×4mm×0.3mm silicon die. The silicon die dissipates heat flux of ...

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 ...

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 ...

Use of COMSOL as a Tool in the Design of an Inclined Multiple Borehole Heat Exchanger

E. Johansson[1], J. Acuña[1], B. Palm[1]
[1]Royal Institute of Technology KTH, Stockholm, Sweden

A field of connected boreholes can be used both for cooling, heating and storage purposes. The boreholes transfer heat to or from the ground, which over time changes the temperature in the ground. It is important that the borehole field is properly sized and evaluated before the construction. This study presents results from borehole field evaluations of inclined boreholes used for cooling ...

Finite Element Simulations of Pulsed Thermography Applied to Porous Carbon Fibre Reinforced Polymers - new

G. Mayr[1], B. Plank[1], J. Suchan[1], G. Hendorfer[1]
[1]University of Applied Sciences, Wels, Austria

Porosity in carbon fiber reinforced polymers (CFRP) as shown in figure 1 degrades the engineering performance, especially the interlaminar shear strength [1]. In the aviation industry a porosity level of 2.5 % has become the maximum level of acceptance. The presence of air-filled voids (pores) has strong effects on the thermal diffusivity. Pulsed thermography offers a rapid, non-destructive ...

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 ...

Study of Energy Transfer Mechanism for a Synchrotron X-ray Gas Absorber with COMSOL Multiphysics

A. Martín Ortega [1], Y. Dabin [1], T. Minea [2], A. Lacoste [3]
[1] ESRF, Grenoble, France
[2] LPGP, Université Paris-Sud XI, Orsay, France
[3] LPSC, Université Joseph Fourier, Grenoble, France

The high power of X-ray beam delivered by synchrotrons and free electron lasers, up to 240 W/mm2, requires heat load management solutions to obtain the best performance from the optical elements which will shape the beam for its use in the experimental stations [1]. One solution is the use of gas attenuators: a tube filled with an inert gas, usually Argon or Krypton, is placed between X-ray ...

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 ...

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 ...