COMSOL Multiphysics Modelling for Measurement Device of Electrical Resistivity in Laboratory Test Cell
C. Rémi, M. Bergeron, and S. Moreau
Bioreactor landfill is based on a homogeneous distribution of the moisture content to increase waste biodegradation. Most of studies have shown that Electrical Resistivity Tomography (ERT) can be a suitable method to study water content variation (2D and 3D). ERT is influenced by many physical parameters and no single relationship with volumetric water content was yet established for Municipal ...
G.E. Stebner, C. Hartwig
Ostfalia University, IMEC, Wolfenbüttel, Germany
In this paper an EMVD (Electro-Mechanical Valve Drive) for combustion engines is redesigned to achieve a fail-safe behavior when power loss occurs. The AC/DC Module and the Moving Mesh interface of COMSOL Multiphysics 4.2 are used to build up a transient model. This model also includes the calculation of eddy currents.
Design of a Dielectrophoretic Based Micropipette for Gene Expression Applications Using COMSOL Multiphysics® Software
D. Wijesinghe , K. Nawarathna ,
 Department of Electrical and Computer Engineering, North Dakota State University, Fargo, ND, USA
We have used COMSOL Multiphysics® software to design a micropipette for single -cell gene expression profiling. The micropipette design allows us to insert it into a single-cell to extract genes through dielectrophoresis. As dielectriphoretic force depends on the applied electric field (E) and its gradient (∇E^2), we have successfully used COMSOL to calculate E and ∇E^2 in the vicinity of the ...
M. S. Luloff , T. W. Krause , J. Morelli ,
 Queen's University, Kingston, ON, Canada
 Royal Military College of Canada, Kingston, ON, Canada
CANDU® reactor pressure tubes (PT) contain D2O, which is used as a moderator. Surrounding the PTs are gas-filled Calandria Tubes (CT), which thermally isolate the PTs from the moderator surrounding the fuel channels. If the garter springs move apart, the PT will sag into the CT. Under contact conditions, the thermal gradient between the hot PT and cold CT accelerates the ingress of deuterium ...
仵杰 , 史盼盼 ,
斜井和水平井中阵列感应响应特性研究是测井数据正确解释的基础。在斜井和水平井中，井轨迹可能以任意角度进出水平地层，阵列感应测井响应计算是复杂的三维电磁场数值计算。基于 COMSOL Multiphysics® 软件的 AD/DC 模块开发完成斜井和水平井中的阵列感应响应三维数值计算方法。详细计算分析水平井和斜井中井位置、目的层厚、目的层电导率、围岩电导率以及目的层与围岩电导率对比度对阵列感应测井响应的影响。结果表明，水平井的阵列感应测井响应特性取决于层厚、电导率对比度、子阵列间距、仪器距层界面距离等多种因素。当层厚大于仪器分层厚度时，水平井响应与直井响应接近；当层厚小于仪器分层厚度时，水平井响应与直井明显不同，在仪器进出界面时，响应出现明显尖峰；给定层厚，与直井比较，短阵列差别小，长阵列差别大。斜井中，当倾角小于30º时，响应受倾角影响小。当倾角从 30º 到 80º 变化时 ...
C. Mandache , T. Theodoulidis ,
 National Research Council Canada, Ottawa, ON, Canada
 University of Western Macedonia, Kozani, Western Macedonia, Greece
In-service detection of fatigue cracking in metallic aerospace structures relies on capable and efficient eddy current inspection procedures. For best results, inspections with surface scanning eddy current techniques are following rigorous procedures that indicate the instrument settings, probe type and configuration. Parametric numerical simulations are representing great tools for optimizing ...
Teknova AS, Kristiansand, Norway
COMSOL Multiphysics has been applied to develop a model for inductive heating. A coarse, lumped model of the interior of a high temperature reactor is coupled to finite element models for the electromagnetic field, the temperature distribution outside the reactor, and mechanical stresses in the crucible. The model can be applied to study operational conditions, thermal stresses, or design ...
B. LaBarge, and E. Gutierrez-Miravete
Gems Sensors and Controls, Plainville, CT, USA
Rensselaer at Hartford, Hartford, CT, USA
A simple proximity sensing circuit is made using magnets actuating reed switches; these switches are wired into a larger circuit that performs auxiliary functions. The success or failure of such systems is a function of their position. A simulation using COMSOL Multiphysics is conducted to study the position of a reed switch relative to a magnet when the switch opens and closes. Ability to ...
S.M. Musa, and M.N.O. Sadiku
Prairie View A&M University, Prairie View, TX, USA
In this paper, we consider the finite element modeling of multilayer transmission lines for high-speed digital interconnects. Using COMSOL we mainly focused on the modeling of the transmission structures with both cases of symmetric and asymmetric geometries. We specifically designed asymmetric coupled microstrips and four-line symmetric coupled microstrips with a two-layer substrate. We ...
S. V. Kulkarni
Indian Institute of Technology
S. V. Kulkarni a Professor in Electrical Engineering Department, Indian Institute of Technology, Bombay, India. Previously, he worked at Crompton Greaves Limited and specialized in the design and development of transformers up to 400 kV class. He has authored book \"Transformer Engineering: Design and Practice\" published by Marcel Dekker, Taylor & Francis Group. The author of more than 120 ...