F. Ferrero, M. Kluge, R. Zeps, T. Spoormaker
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
Chairman PlasticsEurope Fluoropolymers TFE Safety Task Force, Du Pont De Nemours, Dordrecht, The Netherlands
The self-ignition of tetrafluoroethylene (TFE) caused by contact with hot surfaces has been analyzed with the help of simulations performed with COMSOL Multiphysics®. The current study focuses on large-scale heated reactors for the industrial production of polytetrafluoroethylene (PTFE) from TFE at high pressures. Simulations of the self-heating and consequent self-ignition of TFE in a 100-dm3 ...
Saranya srinivasa raghavgan, Sowmya Srinivasa raghavan, Shruti Venkatesh
Rajalakshmi Engineering College, Chennai, India
In this project, we report a design of MEMS microphone that is based on the application of porous silicon in improving the sensitivity of bulk micro machined capacitive pressure sensors. The property of a low Young’s modulus of porous silicon and its dependence on porosity have been exploited to obtain a higher sensitivity compared to pressure sensors with single crystalline silicon membranes. ...
H. Rouch and O. Geoffroy
INOPRO, Villard de Lans, France
High temperature processes are used in a large variety of industrial application. Simulation helps to solve technological problems and increase energy efficiency in case of industrial scale simulation. We present in this paper a research equipment simulation. The aim is to increase knowledge of temperature field in the crystal growth region in order to give researcher some important information ...
M. Yang, A. Young, and B. Crittenden
Department of Chemical Engineering University of Bath, Bath, United Kingdom
A small batch stirred cell which is operated at temperatures up to 400 °C and pressures up to 30 bar is used to study fouling behaviors of selected crude oils. COMSOL Multiphysics package is used for the CFD (Computational Fluid Dynamics) and heat transfer modeling for this stirred cell system. The simulation results are validated against the measured temperature data at various axial ...
E. R. Blatchley, and B.Z. Sun
Department of Civil Engineering, Purdue University, West Lafayette, IN, USA
Mineral precipitation on to the quartz surface of the lamp jackets in UV disinfection process (fouling) has been recognized as a major problem for UV radiation delivery during disinfection operation. Fouling behavior was observed to be induced thermally and influenced by hydraulic character of the UV disinfection configuration. Fouling process involves momentum, heat, and mass transport within ...
J. Schumacher, P. Fideu, G. Ziegmann, and A. Herrmann
TU Clausthal-Institute of Polymere Materials and Plastic Engineering, Clausthal-Zellerfeld, Germany
CTC GmbH Stade, Stade, Germany
Faserinstitut Bremen e.V., Bremen, Germany
The current paper focuses on the creation of a consistent environment for the numerical prediction of the physical properties of polymer composite. A limitation factor for the successful simulation of composite processes is the correct estimation of the effective properties depending on several factors such as the constituents (fiber, polymer), the process setup. The numerical prediction of the ...
L. Yuan and P.C. Pedersen
Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts, USA
Finite element models using COMSOL Multiphysics and MATLAB were developed to solve the problem of stress distribution interior homogeneous, isotropic, incompressible elastic solid material under known vertical external compression with a rectangular contact surface. Moreover, comparison between these results and analytical solutions was used to further validate that stress drops off with ...
Fast Computation of Capacitance Matrix and Potential Distribution for Multiconductor in Non-Homogenous Multilayered Dielectric Media
S.M. Musa, and M.N.O. Sadiku
Prairie View A&M University Networking Academy, Prairie View, Texas, USA
This paper presents the fast computational and modeling of multiconductor transmission lines interconnect in non-homogenous multilayered dielectric media using the finite element method (FEM). We illustrate the potential distribution of the multiconductor transmission lines for the models and their solution time. We compared some of our results of computing the capacitance matrix with method of ...
COMSOL Multiphysics Models for Teaching Chemical Engineering Fundamentals: Absorption Column Models and Illustration of the Two-Film Theory of Mass Transfer
Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA, USA
COMSOL® models have been developed for teaching gas absorption fundamentals. Model results are compared to environmentally significant experimental results for removing CO2 and SO2 from air using water as solvent. For concentrated gas mixtures, the models are shown to be equivalent to but easier to use than the traditional graphical integration method and to a solution method developed with ...
Designing the Actuator for the Next-Generation Astronomical Deformable Mirrors: a Multidisciplinary and Multiphysics Approach
C. Del Vecchio, R. Biasi , D. Gallieni, and A. Riccardi
INAF-OAA, Fierenze, Italy
Microgate Srl, Bolzano, Italy
ADS International Srl, Valmadrera, Italy
The actuation system of the deformable mirror is one of the crucial components of an Adaptive Optics unit. One possible implementation comprehends a linear force motor and a capacitive sensor providing the feedback measure signal. Choosing a magnetic circuit that makes optimum use of the magnetic force delivered by a current and properly arranging the electrostatic geometry allows to obtain very ...