Numerical Modeling of Dielectrophoretic Forces Acting upon Biological Cells in Silicon Lab-On-Chip Devices
S. Burgarella, M. Bianchessi, and M. De Fazio
Advanced System Technology, R&I e-Health, STMicroelectronics, Agrate Brianza, Italy
Dielectrophoresis (DEP) is a promising method for the automated separation of biological cells in a miniaturized format. This technology allows cells to be manipulated electronically while suspended in a microfluidic channel embedded in a silicon lab-on-chip. In this work, several dielectrophoretic configurations have been designed and fabricated using micro-electro-mechanical-systems (MEMS) ...
A. W. M. van Schijndel
Technische Universiteit Eindhoven, Eindhoven, Netherlands
The paper presents the modeling and simulation of 2D heat and moisture transport with and without air movement for a building construction. The research focuses on the effect of air movement through building constructions. Although the typical air movement inside building constructions is quite small (velocity is of order ~10-5 m/s), this research shows it might have much more impact on the ...
Simulated Suspended Solid Concentrations of Secondary Clarifiers in the Activated Sludge Process using the COMSOL Multiphysics Program
C. Gavrila1, and I. Gruia2
1Technical University of Civil Engineering, Bucharest, Romania
2University of Bucharest, Bucharest, Romania
An activated sludge system accomplishes an enhanced biological purification of wastewater, and is the most frequently used system to purify such.The purification of wastewaters are dynamical systems, operating under important and uncontrolled variations of concentration and composition of the polluting substances. Mathematical models are essential for describing, predicting, and controlling these ...
The use of CFD Modeling to Determine the Influence of Residence Time Distribution on the Disinfection of Drinking Water in Ozone Contactors
J. Hofman1,2,3, D. Wind1, B. Wols3, W. Uijttewaal3, H. van Dijk3, and G. Stelling3
1Waternet, Amsterdam, The Netherlands
2Kiwa Water Research, Rijswijk, The Netherlands
3Delft University of Technology, Delft, The Netherlands
Disinfection is one of the most important aspects of drinking water treatment and is directly related to public health.Waternet uses ozone treatment as a main disinfection for drinking water production. Residence time distribution (RTD) in the ozone contactor has a large influence on the disinfection performance of the system. To get more insight into the effect of RTD, a multiphysics model was ...
G. Carrieri, M. V. De Bonis, and G. Ruocco
CFDfood - DITEC, Università degli studi della Basilicata, Potenza, Italy
Heat related processing can have various effects on food and food ingredients. Besides the intended effects to improve safety and quality of the products, undesired changes, nutritional or toxicological, can also occur. In this area, acrylamide formation occupies an important role, as this molecule has been considered as a potential cause of cancer. The possibility that this molecule may be ...
W. H. A. Peelen1, R. B. Polder1, E. Redaelli2, and L. Bertolini
1TNO Built Environment and Geosciences, Delft, Netherlands
2Politecnico di Milano, Milan, Italy
Current passage is used in repair techniques for concrete structures suffering from corrosion, like Cathodic Protection (CP).A mathematical description of ion transport in concrete due to current passage, including the heterogeneous equilibrium involving solid Ca(OH)2 determining the acidity/alkalinity was developed and implemented in COMSOL Multiphysics.From the first modeling results a ...
O. Geoffroy, and H. Rouch,
INOPRO Telespace Vercors, Grenoble, France
A microwave plasma simulation has been tested, and will be fitted and validated. Two types of assumptions were compared: in the first approach the plasma density depends directly on the electric field and some characteristic values of it; in the second approach, plasma density and temperature conservation equations are solved.The second approach was used for Nitrogen plasma. In the case of SF6 ...
S. Wieneke, S. Brückner, and W. Viöl
University of Applied Sciences and Arts, Göttingen, Germany
The heating-up of existing dense plasma with short laser pulses is modelled with COMSOL Multiphysics. The interaction between plasma and the laser beam as a longitudinally pumped light source is discussed. The required properties of the plasma, according to the radial profiles of the temperature and the density, are exemplified.
Perspectives of Thermo-electro-mechanical Micro Actuators for Micro Switch Applications: Design and Simulation
M. Matmat, M. Al Ahmad, and J. Y. Fourniols
Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS-CNRS), Toulouse, France
In this work, thermo-mechanical simulations employing a 3D finite element analysis (FEA) of a current driven V-shaped actuator is presented. The structure's hot arms consist of polysilicon, which was used as the active material for deflection due to the Joule effect.COMSOL Multiphysics with stationary and parametric solvers was used to calculate the resulting deflection when current is applied. ...
SSM Engineering, Stenungsund, Sweden
An eigenvalue as well as a harmonic response analysis is performed on the Gullfaks C, Knock Out Drum (KOD) including some of the connecting pipe systems. The vibration behavior of two new choke valves and their specific connection to the KOD are of special interest. The main concern is the low frequency induced vibration as a consequence of the platform movements. A frequency band between 0-20 Hz ...