Optimization of the Herringbone Type Micromixer Using Numerical Modelling and Validation by Measurements - new
E. Tóth, K. Iván, P. Fürjes
Pázmány Péter Catholic University, Budapest, Hungary
Research Centre for Natural Sciences Institute for Technical Physics and Materials Science Hungarian Academy of Sciences, Budapest, Hungary
COMSOL Multiphysics® software was used in this study to simulate mixing by diffusion and by secondary flow. Particle tracing model was applied to simulate the mixing of cells in the microchannel. Results agreed well with the measurement, an optimal herring-bone structure was proposed for integration into a bioanalytical system.
Trapping DNA Molecules in Fluids Using Electrokinetic Effects Generated by Different Electrode Geometries
S. Ghonge, S. Kapur , S. Banerjee
Birla Institute of Technology and Science, Pilani - Hyderabad Campus, Hyderabad, Telangana, India
In this paper we present results of simulations done to predict the behavior of a system consisting of DNA molecules in an aqueous medium under the combined effect of AC Electroosmosis and Dielectrophoresis (DEP). ACEO is caused by the movement of fluid particles under the influence of the electric field. DEP is caused by polarization of the DNA particle. Two different electrode geometries ...
A. Travis, K. Ekici, J. Freels
The University of Tennessee, Knoxville, TN, USA
Oak Ridge National Laboratory, Oak Ridge, TN, USA
A model utilizing interdimensional variable coupling is presented for simulating the thermal hydraulic interactions of the High Flux Isotope Reactor (HFIR) core at Oak Ridge National Laboratory (ORNL). The model’s domain consists of a three-dimensional fuel plate and a two-dimensional coolant channel slice. In simplifying the coolant channel, the computational cost and solution time are both ...
D. Kekejian, Y. Martinez
ITESO, Tlaquepaque, Jalisco, Mexico
In this work, a new design is suggested which functions both as a pipe for fluid transfer and as a valve which decreases the flow of the fluid in the opposite direction in case there are pressure fluctuations in the pipe. Therefore, we call it a "Deformed Valve". To design the structure, we had to use different geometric shapes and calculate the velocity of the fluid for each shape to determine ...
U. Shukla, and D. Gupta
 Department of Materials and Metallurgical Engineering, Indian Institute of Technology Kanpur, Uttar Pradesh, India
One of the major challenges faced by the semiconductor industry is that electronic circuits produce a lot of heat energy during their operation. And with the current scenario where the gates are packed so much close together, then the problem of heat generation has become extremely significant. So we are working towards the efficient heat management and dissipation solution for the heat ...
B. Agasanapura, C. Nesbitt, and M. Misra
Chemical and Metallurgical Engineering, University of Nevada, Reno, Nevada, USA
In the present work, transport and adsorption of contaminants (lead, cesium) on loamy desert soil was modeled using the Finite Element Method (FEM). The Advective dispersion reaction mechanism was employed to describe the contaminant transport in soil medium. A partial differential equation (PDE) obtained from unsteady mass balance was developed using convective diffusion, solute adsorption, and ...
M. Heidari, and P. Barrade
The core of this modelling is to study heat transfer and fluid dynamics processes for a compression expansion system, and the main particularity is that heat transfer and air movement are due to the movement of the piston. We have implemented a \"moving mesh\" solver to compute the volume changes of the compression chamber followed by a \"Fluid dynamics\" type solver. It allows correct ...
F. Daouda, J. Hamelin, P. Benard, S. Kumar Natarajan 
Insitut de recherche sur l'hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada
We present a novel multi-layered electrode fabrication technique for polymer electrolyte membrane fuel cells (PEMFCs). This method consists of alternate layers of Pt deposition (0.05 mg/cm²) by sputtering on the painted multi-walled carbon-Nafion layer (CNL) with larger concentration of catalyst particles closer to the membrane. Parametric models were developed and validated by experimental ...
T. Wagner, and U. Peil
International Graduate School of Risk Management of Natural and Civilization Hazards on Buildings and Infrastructure, Braunschweig, Germany
Institute of Steel Structures, Technical University Braunschweig, Braunschweig, Germany
Hazardous for the transmission lines is not only the static ice load, but also the aerodynamic instability of iced cables. It can lead to large amplitude oscillations at low frequencies. Also, twisting due to asymmetrical iced cables may increase the fatigue rate. In extreme events, atmospheric icing can cause severe damage on towers and power lines, resulting in extensive electricity ...
B. Castro-Dominguez, R. Ma, A. G. Dixon, Y. H. Ma
Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA, USA
The optimization of operating conditions in multitube membrane modules is highly complex. The multiple physics and irregular geometries involved create a challenge for predicting their behavior. This work analyzes the performance of H2 purification through a module containing seven membranes. Using experimental parameters, a 3-D model was devised, specifying the membrane as a reacting boundary ...