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.

Modeling Flow and Deformation during Hot Air Puffing of Single Rice Kernels

T. Gulati[1], A. Datta[1]
[1]Cornell University, Ithaca, NY, USA

When rice is subjected to intense heating, it results in rapid evaporation of liquid water to vapor. As a consequence, large pressures are generated within the kernel in a span of 15s resulting in large volume changes causing the kernel to puff rapidly. Under suitable conditions, the ratio of initial volume to volume after puffing could be as high as 10. Rice puffing process is a complex ...

Mitigation of Greenhouse Gas Leakage from Oil and Gas Wells

J. S. Crompton [1], H. Spencer [2], J. Thomas [1], K. Koppenhoefer [1]
[1] AltaSim Technologies, Columbus, OH, USA
[2] Seal Well, Calgary, AB, Canada

Pre-existing oil and gas wells and well bores represent highly permeable pathways for leakage of greenhouse gases; in Alberta alone leaks have been estimated to provide the equivalent of 3.5 million tonnes of CO2 per annum. In addition to abandoned wells without plugs, gas leakage may occur when the integrity of wells is compromised by a variety of factors including incomplete construction or ...

Multiphysics Modelling of a Microwave Furnace for Efficient Solar Silicon Production

N. Rezaii [1], J. P. Mai [1],
[1] JPM Silicon GmbH, Braunschweig, Germany

The JPM Silicon GmbH presents a novel method for the production of solar grade silicon in the microwave oven. This method can specially reduce the energy costs and increase the efficiency of the process. A numerical model is developed which depicts the physical, chemical and electromagnetic phenomena of silicon production process. In order to increase the efficiency of the system, it is ...

Two Dimensional Finite Element Heat Transfer Analysis of a Buried Refined Bitumen Pipeline During Initial Start-up, Shutdown Following Initial Start-Up, and Normal Operation

R. Sisco
Worcester Polytechnic Institute, Worcester, MA, USA

This body of work uses the two dimensional finite element heat transfer capabilities of the conduction application mode within COMSOL to examine the temperature distribution in the fluid, pipe wall, insulation, and surrounding soil of a prototypical bitumen pipeline operating in a cold weather environment during the following modes of operation: initial start-up, shutdown following initial ...

Improvement of a Steady State Method of Thermal Interface Material Characterization by Use of a Three Dimensional FEA Simulation in COMSOL

B. Sponagle[1], D. Groulx[1]
[1]Department of Mechanical Engineering, Dalhousie University, Halifax, NS, Canada

An FEA model of a steady state thermal interface material characterization apparatus was created in COMSOL Multiphysics 4.2a. This model was then fitted using three convection heat loss coefficients and the conductance of the TIM layer to a set of experimental measurements made using a steady state apparatus. It was shown that the model successfully matched the measured temperature values and ...

Heat and Mass Transfer Modeling During Freezing of Foodstuffs

O. Rouaud[1], T. Pham[2]
[1]LUNAM Université, ONIRIS, CNRS, GEPEA, UMR, Nantes, France
[2]University of New South Wales, Sydney, Australia

A mathematical model is developed to determine the weight loss and the freezing rate during the freezing of unwrapped foodstuffs. The model allows comparing two freezing processes; the first uses nitrogen gas at -80°C and the second uses cold air. The model includes thermophysical properties that are temperature dependent to take into account the ice formation. The time step has to be chosen ...

Theoretical Calculation and Analysis Modelling for the Effective Thermal Conductivity of Lithium Metatitanate Pebble Bed

M. Panchal[1], A. Shrivastava[1], P. Chaudhuri[1], E. Rajendrakumar[1]
[1]Institute For Plasma Research, Gandhinagar, Gujarat, India

ITER is a joint international research and development project that aims to demonstrate the scientific and technical feasibility of fusion power. A main function of ITER is to test the tritium producing TBM (Test Blanket Module). In IN-LLCB (Lead Lithium Cooled Ceramic Breeder) TBM lithium matatitanate (Li2TiO3) has been selected as tritium breeder material in form of pebbles. The effective ...

Numerical Analysis of the Thermal Resistance of a Multi-Layer Reflective Insulation Material Enclosed by Cavities under Varied Angles

R.S. Pelzers[1], A.W.M. van Schijndel[2]
[1]Former student Building Physics, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands
[2]Chair Building Physics, Department of the Built Environment, Eindhoven University of Technology, Eindhoven, The Netherlands

A numerical analysis on the thermal performance of a sample, consisting of two cavities surrounding a Multi-Layer Reflective Insulation (MLRI) material, under various angles and for downward and upward heat flows was performed. The sample reached high thermal resistance values when placed (nearly) horizontal under an upward heat flux, while at different angles and heat flux directions the ...

Modelling of a 5 Cell Intermediate Temperature Polymer Electrolyte Fuel Cell (IT-PEFC) Stack: Analysis of Flow Configuration and Heat Transfer

A.S. Chandan[1], A. Mossadegh Pour[2], R. Steinberger-Wilckens[2]
[1]Centre for Hydrogen and Fuel Cell Research, University of Birmingham, Birmingham, United Kingdom
[2]University of Birmingham, Birmingham, United Kingdom

Polymer Electrolyte Fuel Cells (PEFCs) are a key technology in the advancement of society towards a low carbon future, in particular for use within the automotive sector. PEFCs are advantageous due to their low operating temperature (60-80 deg.C), quick start up times and responsiveness to load change. However, the requirement for expensive platinum, difficulty of water management and heat ...

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 ...