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Suchbegriff:

Investigations on Natural Frequencies of Individual Spherical and Ellipsoidal Bakery Yeast Cells

M.M Zarandi[1], A. Bonakdar[1], and I. Stiharu[2]
[1]McGill University, Montreal, QC, Canada
[2]Concordia University, Montreal, QC, Canada

In this paper, a Finite Element (FE) and scaled-up experimental modal analysis are employed to estimate the natural frequencies of individual spherical and ellipsoidal cells. It is apparent that the mechanical properties of the living cells and particularly the natural frequencies might ... Mehr lesen

First Approach Toward a Modeling of the Impedance Spectroscopic Behavior of Microbial Living Cells

D. Rauly [1], P. Xavier [1], E. Chamberod [2], J. M. F. Martins [3], J. Angelidis [4], H. Belbachir [5]
[1] IMEP-LAHC, Universite Grenoble Alpes, France
[2] IUT, Universite Grenoble Alpes, France
[3] LTHE, Grenoble Alps University - CNRS - IRD, France
[4] LEAS, St. Ismier, France
[5] HBA Biotech SA, Grenoble, France

The subject of the interactions between electromagnetic (EM) fields and living cells is a strong issue for several decades [1]. Large number of works have been done to study the EM field penetration and inner induced currents in living microorganisms. Relevant information to be collected ... Mehr lesen

Experimental and Theoretical Investigation of Acoustic Metamaterial with Negative Bulk-Modulus

N. R. Mahesh, and P. Nair
SSN College of Engineering
Chennai
Tamil Nadu, India

Acoustic metamaterials are structured materials of negative mass density or negative bulk-modulus or both of them. Materials are tailored in sub-wavelength dimensions so as to get these negative properties. This paper compares the result of an experimental investigation of acoustic ... Mehr lesen

COMSOL as an Aid in the Teaching (Learning) of Heat Transfer

R. López[1], J. Morales*[1], M. Vaca[1], A. Lizardi[1], H. Terres[1], G. Bautista[1], A. Lara[1]
[1]Universidad Autonoma Metropolitana, Tlalpan, Distrito Federal, Mexico

Several undergraduate programs include the “Heat transfer” subject and, in our experience, it is hard for the students to grasp the concepts that are presented in the course. With this in mind, we designed and constructed an apparatus for the experimentation of heat transfer in a short ... Mehr lesen

Computational Analysis on Commercially Available Stent Designs

K. Basu[1], P. Ghosh[2], S. Bhattacharjee[2], S. Das [2], A. Chanda[1]
[1]School of Bio Science and Engineering, Jadavpur University, Kolkata, West Bengal, India
[2]Department of Mechanical Engineering, Jadavpur University, Kolkata, West Bengal, India

Cardiovascular disease has become a major healthcare problem. To tackle this along with bypass surgery, the use of the cardiovascular stent is considered promising and effective. In this study, we aim to find the effectiveness of stent deployments and their influence on haemodynamics ... Mehr lesen

Optimization of the Gas Flow in a GEM Tracker with COMSOL and TENDIGEM Development

F. Noto[1,2], V. Bellini[1,2], E. Cisbani[3,4], V. De Smet[1,5], F. Librizzi[6], F. Mammoliti[1,2], and C. Sutera[6]
[1]Dipart. di Fisica ed Astronomia, Università di Catania, Catania, Italy
[2]INFN – Sezione di Catania, Catania, Italy
[3]IINFN – Sezione di Roma - Sanità Group, Roma, Italy
[4]Italian National Institute of Health, Roma, Italy
[5]Haute Ecole Paul-Henri Spaak, ISIB, Bruxelles, Belgium
[6]NFN - Sezione di Catania, Catania, Italy

The Gas Electron Multiplier (GEM) technology has been proven to tolerate rate larger than 50 MHz/cm2 without noticeable aging and to provide the sub millimeter resolution on working chambers up to 45x45 cm2. A new GEM based tracker is under development for the Hall A upgrade at ... Mehr lesen

Finite Element Modeling for Inspection of CANDU® Steam Generators

S. G. Mokros[1], P. R. Underhill[2], J. Morelli[1], T. W. Krause[2]
[1]Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, ON, Canada
[2]Department of Physics, Royal Military College of Canada, Kingston, ON, Canada

Steam generators (SGs) are used in CANDU® nuclear reactors as heat exchangers to convert water into steam using heat generated in the reactor core. Ferrous trefoil broach support structures prevent excessive vibration of thousands of SG tubes. A probe that uses pulsed eddy current (PEC) ... Mehr lesen

高温堆加热除湿试验升温过程研究

沈凯跃 [1], 郑伟 [1], 银华强 [1], 何学东 [1], 马涛 [1], 马晓珑 [2],
[1] 清华大学核能与新能源技术研究院
[2] 西安热工研究院有限公司

高温气冷堆中使用了大量的碳素材料，作为多孔材料，碳素材料含有一定水分等杂质。为了减小反应堆高温运行条件下的堆内材料腐蚀，高温堆在初装堆和事故后需要对一回路进行严格的加热除湿操作。目前一回路加热除湿主要是依靠主氦风机旋转，将动能转换为热能来提升温度。本文将采取另外一种方案，在蒸汽发生器处增加外加热源来加热一回路工质。基于大型商用软件COMSOL Multiphysics建立高温堆内一回路加热的流动传热模型，对两种加热方案的一回路升温过程作数值分析，为高温堆加热除湿方案的选择提供有益的指导。本文中使用的物理场为传热——共轭传热——湍流，多物理场耦合为非等温流动。 Mehr lesen

Mathematical Modeling Of Traveling-Wave Electroosmotic Micropumps By Using Of The Weak Form

J. Hrdlicka, P. Cervenka, and D. Snita
Institute of Chemical Technology Prague, Prague, Czech Republic

This contribution is devoted to the mathematical modeling of the AC electroosmotic micropumps in COMSOL Multiphysics and Matlab. The mathematical model involves the microchannel surroundings and several AC-voltage driving modes. The weak form has been used for handling singularities and ... Mehr lesen

Model of an Interdigitated Microsensor to Detect and Quantify Cells Flowing in a Test Chamber

E. Bianchi[1], F. Boschetti[1], G. Dubini[1], and C. Guiducci[2]
[1]Politecnico di Milano, LABS, Laboratory of Biological Structure Mechanics, Structural Engineering Department, MI, Italy
[2]CLSE - Swiss Up Chair -Laboratory of Life Science Electronics, EPFL, Losanna, Swissland

Microfabricated planar interdigitated electrodes can detect and analyze cells or particles giving an impedance-based characterization. This method presents several advantages: real-time detection, label-free analysis, non-invasive sensing, easiness of integration and high-throughput ... Mehr lesen

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