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 Study of Valve Regulated Lead Acid Batteries and Electronics Chamber Used in Stand-Alone Street Lighting Applications - new

D. Groulx[1], J. Skaalum[1], T. Jamieson[1]
[1]Mechanical Engineering, Dalhousie University, Halifax, NS, Canada

This paper presents a study on the heat generation of Valve-Regulated Lead Acid (VRLA) batteries used in off-grid streetlighting applications from PoleCo, a Halifax based company. One goal of the project was to produce validated COMSOL® models of the enclosure that holds these VRLA batteries. This model can then be used to investigate methods of reducing the temperature of the batteries based on ...

Design, Simulation, and Fabrication of Thermal Angular Accelerometers

H. Alrowais [1],
[1] School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA

This abstract introduces a sensor design for detecting angular acceleration in a single plane using thermal convection. The working principal of the device is based on probing temperature profile changes along a micro-torus caused by angular acceleration. By properly choosing the locations of the heaters as well as the temperature sensors, the output signal will correlate to in-plane angular ...

Numerical Analysis of Radiant Heat Emission Systems

F. Ochs [1], M. Magni [2], M. Bianchi Janetti [1],
[1] University of Innsbruck, Unit for Energy Efficient Buildings, Innsbruck, Austria
[2] University of Bologna, Bologna, Italy

Radiant heating generally addresses all heat emission systems having a share of radiant heat emission greater than 50%, compared to a convector or fan coil where the heat is transferred mainly by means of convection. Recently, so-called infrared-heating systems are discussed as a cost-effective heating system. Relative small areas of typically 0.6 m x 1.2 m with temperatures up to 120 °C are ...

Heat Flux Predictions for a 3-D Compost Model

M. Teutli [1], Jiménez[1], Lozano[1], Peláez[1], J. Roque[2], and I. González[3]
[1]BUAP, Puebla, Mexico
[2]Universidad Veracruzana, Xalapa, VZ, Mexico
[3]UAM, Mexico City, Mexico

A 3-D model for compost was constructed taking as geometry basis a truncated cone, with dimensions of 4 m radius and 3 m height; in this structure an energy balance is applied for a two phase system (solid-air). Compost energy processes are modeled using COMSOL with a modified heat transfer equation which includes: volumetric heat capacity, chemical oxidation and biological growing and ...

Simulation of Fast Response Thermocouple for the Nuclear Reactor Core

K. Dusarlapudi[1], B. K. Nashine[2], D. Bai[3], and C. S. Babu[1]
[1]KL University, Vaddeswaram, Guntur, Andhra Pradesh, India
[2]E.D&S.S, IGCAR Kalpakkam, India
[3]VIT, Vellore, India

Thermocouples have been used for measurement of temperature ever since the discovery of Seebeck effect. Though the voltage output of a thermocouple is a function of the temperature difference between hot and cold junctions, the response time and the magnitude of voltage depends on the geometry and material of the thermocouple also. This report deals with the study of the mineral-insulted ...

Solar Cell Cooling and Heat Recovery in a Concentrated Photovoltaic System

M. Cozzini[1]
[1]Fondazione Bruno Kessler (FBK), Renewable Energies and Environmental Technologies (REET) Unit, Trento, Italy

Concentrated photovoltaic systems with high efficiency solar cells are being widely investigated, aiming at improving the cost-efficiency balance in the solar energy field. Different cell types are in use: e.g., high concentration triple junction cells, reaching efficiencies of the order of 35 - 40 % at 1000 suns, and medium concentration mono-crystalline silicon cells, with efficiencies of the ...

Anisotropic Heat Transfer in Orthocyclically Wound Coils

T.L. van Vuure[1]
[1]Tecnotion B.V., Almelo, The Netherlands

Tecnotion produces linear motors for the high tech automation and semiconductor markets. Orthocyclically wound coils give the best performance because the largest number of windings can be packed into a given volume, as opposed to "wild winding", where the windings fall where they may. Additionally, the anisotropic heat conduction perpendicular to the wire direction is optimized because each ...

Optimal Thermal Design of Converged-Diverged Microchannel Heat Sinks for High Heat Flux Applications

D. Chakravarthii [1], S. Subramani [1], M. Devarajan [1],
[1] Univeristy of Science Malaysia (USM), Georgetown, Penang, Malaysia

With the advancements in aerospace technology, micro-electromechanical systems, hybrid data centres and microfluidics, the miniature size electronic chips in such applications are need of the century. The major challenge in microelectronic chips is to eliminate the generated heat for stable and reliable operation of devices. Microchannel heat sinks are efficient method to dissipate heat when the ...

Influence of a Refurbishing on an Old Residential Building’s Wall in Paris in Summer: Mass and Heat Transfer Approach - new

K. Azos-Diaz[1], B. Tremeac[2], F. Simon[2], D. Corgier[2], C. Marvillet[1]
[1]Laboratoire de Chimie Moléculaire, Génie des Procédés Chimique et Energétique, Paris, France
[2]MANASLU Ing., Savoie Technolac, Le Bourget du Lac, France

The implementation of thermal insulation in old residential building walls could compromise the hygrothermal behavior of the construction, especially in summer time when it is placed inside. A bad installation of insulation could have consequences on the quality of indoor air conditions and on the health of the wall mostly during hot periods. Thus, the evaluation of heat and mass transfer ...

Transport of Cadmium through Molten Salt to Argon Cover Gas in Electrorefiner

K.Revathy[1], S. Agarwal[1], B. Muralidharan[1], G. Padmakumar[1], K. K. Rajan[1]
[1]Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, India

Electro refining is one of the important step in the Pyro processing nuclear spent fuel with molten salt. The electro refiner is a process vessel consists of anode ,cathodes and stirrers and ultra –high pure argon gas is provided at the top for inert atmosphere and at the bottom a cadmium layer is provided. The vapor pressure of the cadmium is high at the operating temperature, the cadmium vapor ...