J. S. Crompton , K. Koppenhoefer , S. Yushanov ,
 AltaSim Technologies, Columbus, OH, USA
Solenoid valves control fluid flow by using the passage of an electric current to produce a magnetic field that controls the displacement of a pre-tensioned plunger. As the electric current increases, the induced force causes the plunger to move upward against the force exerted by a compression spring. In this way, flow of pressurized fluid through an orifice can be controlled through a coupled ...
A. Mallco Carpio , M. Cortes Carmona ,
 University of Antofagasta, Antofagasta Energy Center, Antofagasta, Chile
One of the most noticeable effects in loss of performance and capacity of thermal systems is produced by altitude. This causes that the density of a compressible fluid and the atmospheric pressure are considerably reduced, causing a decrease in electrical power and thermal systems. Given this, the packages of lithium ion batteries that use forced cooling by a compressible fluid, are directly ...
陈冬 , 张佳亮 , 叶智慧 , 努莎 , 龚珂 ,
石油开采过程中，油田广泛采用多分支水平井技术以提高产量，因此研究多分支水平井对油气井产能的影响具有重要意义。本文应用达西定律接口，建立不同井眼几何尺寸的多分支水平井二维模型，分别计算产量。并且应用 COMSOL App 开发器，建立了多分支水平井 APP，可以方便非专业人士的使用。计算结果表明：（1）侧向井段长度对多分支水平井产能影响显著，侧向井段越长，产量越高；（2）侧向井段与主井眼夹角，在 25°~ 55° 时，产能较大，角度为 15° 时产能较小，同时夹角对产能的影响随开采时间逐渐增大。建议生产过程中，适当增加水平井对应的侧向井的长度，进而获得更多的油气资源；适当增加主井眼与侧向井段之间的夹角来达到增产的目的，使收益更大化；适当增加两相邻侧向井段之间的距离，提高产能。
A. El-Deib, F. Dawson, S. Bhosle, D. Buso, and G. Zissis
University of Toronto, Toronto, Ontario, Canada
LAPLACE-University of Toulouse, Toulouse, France
This work uses COMSOL to simulate the Dielectric Barrier Discharge (DBD) lamp coupled to the external electrical circuit. The coupled system is modeled to capture the effect of the electrical parasitic elements on the efficiency of the DBD which is more realistic as compared to previous trials which assumed that a perfect voltage source is applied to lamp terminals. The obtained results ...
E. Zanchini, and T. Terlizzese
Dipartimento di Ingegneria Energetica, Nucleare e del Controllo Ambientale, Università di Bologna, Bologna, Italy
The results of two thermal response tests recently performed on two vertical borehole heat exchangers (BHEs) are presented. The BHEs have the same cross section and a depth of 100 m and 120 m respectively. The evaluation of the thermal properties of the ground and grout are performed by a finite-element simulation method, developed through the software package COMSOL Multiphysics 3.4.
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 ...
A. Nyman, M. Behm, and G. Lindbergh
Applied Electrochemistry, School of Chemical Science and Engineering, Royal Institute of Technology Stockholm, Sweden
Modeling of mass transport is an important step in evaluating lithium-ion battery electrolytes and understanding cell performance. For high-power applications, concentration gradients in the electrolyte lead to limiting currents, which limit the power-density of the battery. The model has been used for determining a complete set of transport and thermodynamic properties for LiPF6 dissolved in an ...
N.M. Bruno, C. Ciocanel and A. Kipple
Department of Mechanical Engineering, Northern Arizona University, Flagstaff, Arizona, USA
Dept. of Electrical Engineering and Computer Sciences, Northern Arizona University, Flagstaff, Arizona, USA
This paper presents the approach taken through the utilization of COMSOL Multiphysics 3.5a, to develop a model that simulates the flow of a magnetorheological (MR) fluid through a micro-channel. The model was developed as an aid in the analysis of a micropump that produces flow by means of displacement of a MR fluid slug within a microchannel.
D. Dalle Nogare and P. Canu
Department of Chemical Engineering Principles and Practice, University of Padova, Padova, Italy
This work investigates the effects of boundary conditions on the species profiles in heterogeneous catalysis, with low Péclet systems. Hydrogen combustion in Helium was chosen because of the high diffusivities. Furthermore, already at T=300°C over a Pt catalyst, kinetics is very fast and the composition gradients at the inlet extremely steep. The issue is analyzed with 1D models, ...
S. De Paolis, F. Lionetto, and A. Maffezzoli
Department of Innovation Engineering, University of Salento, Lecce, Italy
Finite element analysis has been used to model the ultrasonic wave propagation both in a custom made transducer and in the tested polymer sample. The model consists of acoustic (passive elements) and electroacoustic (active elements) transmission lines. The simulation of the acoustic propagation accounts for the interaction between the transducer and the materials in the buffer rods, and the ...