J. Rojo, S. Ognier, and S. Cavadias
Laboratoire de Génie des Procédés Plasmas et Traitements de Surfaces, University Pierre et Marie Curie, Paris, France
A lot of techniques are developed to treat soils polluted by hydrocarbons pollutants: incineration, thermal treatment, extraction, chemical oxidation, bioremediation… Some of these techniques are very energy consuming (incineration, thermal treatment…) and often need a subsequent treatment of the generated gases or liquids. Of all the decontamination methods, bioremediation appears to be the ...
Department of Biomedical Engineering, Institute of Oral Medicine, National Cheng Kung University, Tainan, Taiwan
Electrical impedance tomography is a non-invasive, low-cost medical imaging technique that can be used long term without radiation hazards. We built a model of the torso, and then used COMSOL Multiphysics® to simulate applied current patterns, compute voltages, and find equi-potential lines. We used a filter backprojection algorithm to find the internal resistivity distribution. The results ...
Estimation of Hydraulic Conductivity for a Heterogeneous Unsaturated Soil Using Electrical Resistivity and Level-Set Methods
T. K. Chou, M. Chouteau, J. S. Dubé
École Polytechnique de Montréal, Montréal, QC, Canada
École de Technologie Supérieure, Montréal, QC, Canada
The estimation of the soil saturated hydraulic conductivity (Ks) is crucial in understanding water flow and transport of contaminants. There are many hydrological techniques available in determining this parameter (constant head method, in-situ soil analysis, etc...). While these techniques can provide quality data points, they are often limited by sparse data sampling and scale. Therefore ...
R. Zhu, X. Xiong, P. Patra, C. Jin, J. Hu
Department of Biomedical Engineering, University of Bridgeport, Bridgeport, CT, USA
Department of Electrical & Computer Engineering, University of Bridgeport, Bridgeport, CT, USA
Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA
In this research, we use the COMSOL Multiphysics® software to design and simulate a digital microfluidic droplet adapter for board-level biochip integration. Digital Microfluidic Biochip (DMFB) has gained tremendous research interest in recent years due to its importance in Lab-on-a-Chip and other bio-MEMS (bio-Microelectromechanical Systems) devices. However, different DMFB microarray from ...
Thermal Study of Valve Regulated Lead Acid Batteries and Electronics Chamber Used in Stand-Alone Street Lighting Applications
D. Groulx, J. Skaalum, T. Jamieson
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 ...
Z. Zheng, R. Zhang
Corning Incorporated, Corning, NY, USA
Introduction: Glass relaxation occurs in a range of temperature during transition from equilibrium to super-cooled liquid. Viscoelastic material model can be applied to simulate glass behavior during the glass transition regime and to predict the glass deformation and stress evolution. Viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when ...
SPAWAR Systems Center (SSC) ATLANTIC, Charleston, SC, USA
Additive manufacturing uses 3D printing to build physical parts from CAD-based designs. The technology includes fused deposition modeling (FDM) and selective laser sintering (SLS) methods. 3-D printing is of particular interest for smaller, one-of-a-kind, customizable products. A cube satellite (CubeSat) containing fiber reinforced SLS parts has been successfully launched (Ref 1). Lower ...
An Improved Loudspeaker Frequency Response by Using a Structure of Rigid Absorptive Panel in a Vented Cabinet
Community Light & Sound Inc., Chester, PA, USA
When placing a loudspeaker in a cabinet, standing waves inside the cabinet affect the frequency response with ripples. This peaks and dips due to pressure cancellation inside the cabinet have an effect on the diaphragm and generating sound out from the vents. If it was in a condition of total absorption of the sound waves at the back of the diaphragm, the transducer would otherwise have a much ...
J. Parikh, A. Kapela, N. Tsoukias
Biomedical Engineering Department, Florida International University, Miami, FL, USA
Localized calcium events in the endothelial cells (EC) can modulate smooth muscle cell (SMC) calcium (Ca2+) and membrane potential dynamics through release of endothelium derived hyperpolarizing and relaxing factors. Ca2+ levels in the smooth muscle cell (SMC) determine its contractile state.The underlying complex mechanism regulating the SMC Ca2+ levels and ultimately vessel tone remains poorly ...
Finite Element Simulations of Pulsed Thermography Applied to Porous Carbon Fibre Reinforced Polymers
G. Mayr, B. Plank, J. Suchan, G. Hendorfer
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 . 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 ...