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Thermal Design of Lithium Sulfur Batteries

R. Purkayastha [1], S. Schleuter [1], G. Minton [1], S. Walus [1], M. Wild [1],
[1] Oxis Energy Ltd, E1 Culham Science Centre, Abingdon, United Kingdom

OXIS Energy Ltd is a pioneer in the research and development of Lithium Sulfur batteries. Scaling up from R&D level coin cells to pouch cells for automotive use, engineering design and thermal management start to become critical. In this study, heat flow at various levels of the cell is investigated. We analyzed different heat flow scenarios of the cell, and found that standard pack arrangements ...

Simulation of Slag/Gas and Slag/Iron Interface Tilting in Blast Furnace Hearth During Slag Tapping

Y. Kaymak [1], T. Hauck [1], R. Lin [2] , H. Rausch [2]
[1] VDEh Betriebsforschungsinstitute GmbH, Düsseldorf, Germany
[2] AG der Dillinger Hüttenwerke, Dillingen, Germany

The blast furnace hearth drainage constitutes a major part of the blast furnace operation. Especially, keeping track of the iron and slag levels is crucial to adapt the tapping strategy. The operational target is usually not only to empty the blast furnace as far as possible but also to keep the slag below a critical level to prevent flooding of the tuyeres where the hot blast is injected into ...

Transformation Optics Simulation Method for Stimulated Brillouin Scattering

R. Zecca [1], P. T. Bowen [1], D. R. Smith [1], S. Larouche [1],
[1] Center for Metamaterials and Integrated Plasmonics and Department of Electrical and Computer Engineering, Duke University, Durham, NC, USA

Stimulated Brillouin scattering (SBS) is a nonlinear phenomenon coupling optical and elastic waves. Traditionally regarded as an undesirable side-effect, it has garnered renewed interest as a platform for investigating slow light, nonreciprocity, and for designing high-performance chip-integratable optical elements. While the design of such devices relies on numerical simulations, frequency ...

Heat Conduction in Porous Absorption Layers for Thermography Applications - new

L. Helmich[1], A. Huetten[1]
[1]Bielefeld University, Bielefeld, Germany

Thermography measurements on metallic thin films are challenging due to reflections from the environment. We present a thin "gold black" absorption layer to deal with this issue. A multiphysics model is introduced to correct the experimentally obtained data for undesirable heat transfer effects between the metallic sample and the absoption layer.

Modeling and Simulation of Piezoresistive Pressure Sensor for 2bar Application

M. Ramezani [1], M. El Barkouky [1],
[1] Melexis, Tessenderlo, Belgium

In this paper, we focused on modeling of the piezoresistive pressure sensors. The Structural Mechanics Module of COMSOL Multiphysics® software is used to model the sensor and make a comparative study of the MEMS pressure sensor with different shape and size of membrane. The impact of membrane shape and size on sensitivity and nonlinearity of the pressure sensor is investigated. For example, it ...

Design and Analysis of a Wetting Lens for the Pinhole Cameras of a Two Phase Flow System

A. K. Reddy[1], T. Satyanarayana[1]
[1]Lakireddy Balireddy Autonomous College of Engineering, Mylavaram, A.P., India

The present work reports the fabrication process of micro lens for pinhole cameras, modeled using COMSOL Multiphysics®, by satisfying the wetting properties. Wetting is a change in contact angle between the liquid and solid surface area. The wetting properties are clearly understood in terms of forces. The two immiscible fluids were taken for the formation of fluid-fluid and wall-fluid ...

Finite Element Analysis of Photoacoustic Response from Gold Nanoparticle

Y. Davletshin[1], J. C. Kumaradas[1]
[1]Ryerson University, Toronto, ON, Canada

Photoacoustic (PA) imaging has matured into a clinical modality for tissue imaging and functional cancer cell research. It uses a pulsed laser to irradiate a region and generate a thermally-induced acoustic pressure wave that can be collected by an ultrasound transducer. The optical absorption/PA contrast of the region of interest can be enhanced by the use of plasmonic nanoparticles. The ...

Numerical Study of Laminar Forced Convection Cooling of Circuit Board Mounted Heat Source Array

S. Durgam [1], S. P. Venkateshan [1], T. Sundararajan [1],
[1] Indian Institute of Technology Madras, Chennai, India

This paper deals with the numerical study of optimal distribution of rectangular heat sources populated on a substrate board for electronic cooling. The simulations are performed for laminar forced convection conjugate heat transfer with vertical orientation of substrate board. The laminar forced convection - conjugate heat transfer simulations are carried out using COMSOL Multiphysics® with ...

Simulating Forced Convection in a Bingham Plastic Fluid

E. Tejaswini [1], B. Sreenivasulu [1], B. Srinivas [1],
[1]Gayatri Vidya Parishad College of Engineering, Visakhapatnam, Andhra Pradesh, India

In this work, the heat transfer characteristics of two heated cylinders of square cross-section immersed in a streaming Bingham plastic medium have been studied. The governing differential equations (continuity, momentum and thermal energy) have been solved numerically over wide range of conditions as: plastic Reynolds number, 0.1 ≤ Re ≤ 40, Prandtl number, 1 ≤ Pr ≤ 100, Bingham number, 0 ≤ Bn ≤ ...

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 ...