Simulation-based Analysis of the Spatial Sensitivity Function of an Electrical Capacitance Tomography System
A. Fuchs, and H. Zangl
Institute of Electrical Measurement and Measurement Signal Processing, Graz University of Technology, Graz, Austria
This paper investigates the effects of the soft field character of an Electrical Capacitance Tomography system by means of analyzing the 3D sensitivity distribution of the pipe interior using Finite Element Analysis.The aim of the determined sensitivity is to overcome restrictions caused by the soft field without being forced to use (active) guarding strategies.
J.-M. Barois, and C. Goulmy
PHOTONIS, Brive, France
Streak tubes are widely used in high-speed signal analysis; they give spatial, temporal and intensity information about one single event. Time resolutions of 0.7 pico-second can be achieved and in that time-domain, PHOTONIS tubes are second-to-none.Applications are numerous and range from plasma physic to femtosecond laser applications. In streak tubes, electrons move from the photocathode to the ...
D. M. G. Preethichandra1, B. G. L. T. Samaranayake2, A. M. U. S. K. Alahakoon2 and K. Kaneto1
1Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Hibikino, Wakamatusu-Ku, Kitakyushu-Shi, Japan
2Department of Electrical and Electronics Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya, Sri Lanka
This paper characterizes and models the bending motion of the strip-type Ionic Polymer Metal Composites (IPMC) actuators using the theory of Large Deflections of Beams. From here it derives a thermal analogy. The mathematical model has been experimentally verified for an actuator with the dimensions 25mm×2.6mm×0.44 mm.Theoretical and experimental results are compared to show the validity of the ...
M. C. Suarez-Arriaga1, F. Samaniego2, and J. Bundschuh3
1Faculty of Sciences, Michoacan University, Morelia, Mich., Mexico
2Faculty of Engineering, National University of Mexico, Morelia, Mich., Mexico
3Instituto Costarricense de Electricidad (ICE), Morelia, Mich., Mexico
We developed a new numerical model able to predict the critical oil rate for which oil-producing wells can be invaded by geothermal brine. The model is a single nonlinear partial differential equation (PDE) which depends only on water saturation. This PDE is a 3D-generalization of the classical 1D-Buckley-Leverett model. To solve this model, we used Lagrange-quadratic finite elements into the ...
Teaching Computer-aided Modeling of Biomedical Processes in an Upper Level Undergraduate Course using COMSOL Multiphysics
V. Rakesh, and A. K. Datta
Dept. of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA
Computer-Aided Engineering: Applications to Biomedical Processes is a three credit course intended for seniors and juniors in Biological Engineering and Mechanical Engineering at Cornell University with a class size of about 50-55 students.The course introduces finite element modeling using COMSOL Multiphysics to solve biological/biomedical problems to students with a background in transport ...
Geometrical Optimization of Pyrophosphate Concentration in Thermosequencing Platform for DNA Sequencing
H. Esfandyarpour1,2, B. Zheng1, R. F. W. Pease1, and R. W. Davis2
1Center for Integrated Systems, Department of Electrical Engineering, Stanford University, Stanford, CA, USA
2Stanford Genome Technology Center, Stanford, CA, USA
For the past three decades, Sanger’s method has been the primary DNA sequencing technology; however, inherent limitations in cost and complexity have limited its usage in personalized medicine and ecological studies. A new technology called “Thermosequencing” can potentially reduce both the cost and complexity of DNA sequencing by using a microfluidic platform. To optimize the efficiency of ...
Numerical Simulation of Crystallinity Distribution Developed In the Extrusion of Thick Walled Polypropylene Pipe
R. D. Wilcox1, and J. Collier2
1Chemistry Department, Lincoln Memorial University, Harrogate, TN, USA
2Chemical Engineering Department, Florida State University, Tallahassee, FL, USA
In a numerical simulation for crystallinity distribution, a 36 cm diameter polypropylene pipe with 3.7 cm wall thickness consisting of 3 subdomains that include a die, cooling box, and take-off section was modeled in a 2D axisymmetric geometry using COMSOL Multiphysics.The generalized heat transfer module was used to solve for the temperature distribution in the flowing melt using conductive and ...
D. Bichsel1, and P. Wittwer2
1HESSO, Ecole d'Ingénieurs de Genève, Geneva, Switzerland
2DPT, Université de Genève, Geneva, Switzerland
We discuss a new numerical scheme involving adaptive boundary conditions which allows to compute, at very low Reynolds numbers, drag and lift of airfoils with rough surfaces; efficiently and with great precision.As an example, we present the numerical implementation for an airfoil consisting of a line segment. The solution of the Navier-Stokes equations is singular at the leading and trailing ...
Hybrid Finite Element-Finite Volume Algorithm for Solving Transient Multi-Scale Non-Linear Fluid-Structure Interaction during Operation of a Hydraulic Seal
A. Thatte, and R. Salant
Georgia Institute of Technology, Atlanta, GA, USA
This paper presents a hybrid finite element – finite volume algorithm for solving multi-scale fluid-structure interaction during transient operation of a hydraulic rod seal. The elasto-hydrodynamic model consists of several micro-scale and macro-scale analyses types, all incorporated in a single hybrid iterative computational framework to solve these highly coupled nonlinear multiphysics ...
Hemodynamic Therapy of Middle Cerebral Artery Vasospasm Guided by a Multiphase Model of Oxygen Transport
S. Conrad[1,2], P. Chittiboina, and B. Guthikonda
Department of Bioinformatics and Computational Biology, Louisiana State University Health Sciences Center, Shreveport, LA, USA
Department of Biomedical Engineering, Louisiana Tech University, Ruston, LA, USA
Department of Neurosurgery, Louisiana State University Health Sciences Center, Shreveport, LA, USA
Cerebral vasospasm is a complication of subarachnoid hemorrhage and other neurosurgical emergencies that reduce blood flow to the brain. Part of the approach to management of vasospasm is to improve flow through the stenotic areas by reducing by decreasing blood viscosity and enhancing flow through the stenosis. To examine the interaction of these factors, we applied computational fluid dynamics ...