AC Electroosmosis and Dielectrophoresis for Trapping Spherical Particles between Rectangular and Triangular Electrodes
S. Narayan, H. Francis, S. Ghonge, D.N. Prasad, A. Sethi, S. Banerjee, S. Kapur
Department of Physics, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
Department of Biological Sciences, Birla Institute of Technology and Science, Pilani, Hyderabad Campus, Hyderabad, Andhra Pradesh, India
We describe methods and results of simulations done for predicting behavior of particles in an aqueous solution under an applied AC electric field on electrodes of rectangular and triangular shapes. Here the two major effects which come into play are Dielectrophoresis and AC Electroosmosis. Two simulations have been presented, one for rectangular and one for triangular shaped electrodes. We have ...
E. Abarca, A. Idiart, O. Silva, L.M. de Vries, J. Molinero, F. Vahlund, H. von Schenck
Amphos21 Consulting, Barcelona, Spain
Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden
The Swedish Nuclear Fuel and Waste Management Company (SKB) operates the underground repository for low- and intermediate-level nuclear waste (SFR) located in Försmark, Sweden. An extension of the SFR is planned to accommodate mainly waste arising from the decommissioning of Swedish nuclear power plants. The long-term safety assessment for the SFR repository takes into account the future ...
Priyanshu Goyal, I. Thangamani, V. Verma, V.M. Shanware, R. K. Singh
Bhabha Atomic Research Centre, Mumbai, India
In a nuclear reactor, the containment is the last barrier for the release of radioactivity during severe accident conditions. Containment material can be concrete or steel or steel-lined concrete. Steel containments have a high load bearing capacity and a high degree of leak tightness at higher pressures. In case of a severe accident, heat can be removed from the containment by a guide panel, ...
Computational Modelling of Fluid Dynamics in Electropolishing of Radiofrequency Accelerating Cavities - new
H. Rana, L. Ferreira
Loughborough University, Leicestershire, UK
European Organisation for Nuclear Research (CERN), Genéve, Switzerland
Electropolishing is an electrochemical process that radiofrequency accelerating cavities undergo in order to improve their inner metal surface finishing. This is performed prior to their installation into particle accelerators, in order to enhance their accelerating properties. Using COMSOL Multiphysics® software it was possible to model the process throughout the cavity and study the fluid ...
引言： 对于微流控分选芯片而言，分支出口的位置、宽度等几何参数会直接影响到粒子分选精度与回收效率。但是，遗憾的是，对于流道各分支出口位置的高效设计方法却鲜有报道。当前的设计方法主要是对每一种目标粒子直接进行轨迹仿真[1~7]。但这种方法的运算成本巨大，如果粒子分散体系涉及到的粒径种类繁多且流道结构复杂，那么对每种粒径都进行仿真分析将会使得计算量与计算精度之间的矛盾愈加尖锐；而且，每引入一种没有被仿真研究过的粒径，都要对其重新进行仿真运算，运算成本巨大[8~10]。 据此，本文提出了一种结合有限元分析仿真与系统辨识方法的粒子出射位置预测方法：利用少量的几组仿真实验结果即可以对多分散粒子体系进行出射位置的定量预测，大大减小运算量，提高芯片几何设计的效率。具体方案如下： COMSOL Multiphysics® 软件的使用： 首先，进行仿真实验，获得原始拟合数据。仿真分为两部分 ...
N. Londhe, R. Majumdar, J. Rathore, and N. Sharma
Dept. of Mechanical Engineering
Birla Institute of Technology and Science
Nanorobots may be used in the advancement of medical technology, healthcare, and environment monitoring by swimming in biological fluids flowing in narrow channels of a few hundred nanometers in the area of bio-medical engineering. The pronounced effects in nanometer scale such as increased apparent viscosity and low Reynolds number make the designing of propulsion mechanism a challenging ...
Preliminary Study of Particle Trajectory and Secondary Flow in Bend Configurations to Reduce Erosion
O. Ayala , A. Arruda , L. Calembo , E. Enes , D. Monteiro , R. Paizante , A. Rocha , M. Simões , J. Michaeli ,
 Department of Engineering Technology, Old Dominion University, Norfolk, VA, USA
 Brazil Scientific Mobility Program, CAPES, Brasilia, DF, Brazil
To the best of our knowledge, only few researchers have made attempts to minimize the erosion in bends by modifying the bend configuration in order to alter the particle-laden flow pattern to reduce the erosion. In this work, we revisited those previously proposed bend configurations to reduce erosion, in additional to two of our own design. We found that secondary flows play an important role ...
INFN/LNL, Laboratori Nazionali di Legnaro, Legnaro, Italy
Many scientific instruments are based on high vacuum equipment with a gas pressure maintained in the order of 1 Pa or below. The gas flow in the low pressure limit, called the molecular flow regime, is a case of transport with zero viscosity. The ability to solve an integral equation on the boundary with finite elements methods allows us to find the gas densities and flows in the ...
Luleå University of Technology, Luleå, Sweden
This paper presents a numerical study of the deposition of submicron charged spherical particles caused by convection, Brownian and turbulent diffusion in a pipe with a smooth wall and with a cartilaginous ring wall structure (see figure). The model is supposed to describe deposition of charged particles in generation 0 (trachea) of the human lung.The problem is defined by solving the fluid flow ...
M. Fernandes, D. Matthiesen
Case Western Reserve University, Cleveland, OH, USA
The CWRU Turbine is a research turbine located in a urban campus in Cleveland, Ohio. This location may create turbulence, resulting in a possible loss in energy generation. This research attempts to answers the question of whether the wind flow is affected by the buildings or not. The surrounding buildings, which vary in height from 20 to 40 meters, may affect the wind patterns at the hub ...