Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Computational Science and Engineering at DuPont

R. Nopper
Dupont Engineering
Research & Technology
Wilmington, DE

Rick has a BS in Physics, a ScM in Geological Sciences, and a PhD in Physics. He worked at Air Force Geophysics Laboratory, Conoco Petroleum Exploration Research, and, since 1989, has been at the DuPont Experimental Station. In this industrial setting, Rick has had opportunity to work on a great diversity of problems ranging from traditional engineering studies, using commercial finite-element ...

Analysis of Superheater Tubes with Mutual Irradiation as Applied to a Solar Receiver Steam Generator

N. Lemcoff[1], S. Wyatt[2]
[1]Rensselaer Polytechnic Institute, Hartford, CT, USA
[2]Alstom Power, Windsor, CT, USA

The objective of this paper is to analyze the temperature variations within a superheater tube of a solar receiver steam generator. The tube is heated by concentrated, collimated solar irradiation with major cooling by an internal steam flow. The influence of heat loss by radiation, internal convection, and conduction are considered. Analytical models are obtained for an isolated tube, and the ...

Computational Fluid Dynamics Approach to Evaluate Electrostatic Precipitator Performance

M. Ahmadi [1]
[1] Faculty of Engineering Technology, University of Twente, Enschede, The Netherlands

Electrostatic precipitation is an extremely efficient way of filtering fine particles from the airstream. Electrostatic precipitators (ESPs) can control airborne emission without significantly slowing down the rate of flow, because of the low pressure drop across this type of filters. A computational model was developed for the simulation of ESP operation and the parameters of interest were ...

Numerical Simulation of Forced and Static Smoldering Combustion

S. Singer[1], W. H. Green[1]
[1]Massachusetts Institute of Technology, Cambridge, MA, USA

Transient, two-dimensional (axisymmetric) simulations of a cigarette subject to realistic static and forward smoldering cycles were performed. The computational domain consists of a porous packed bed of tobacco and a filter surrounded by a thin, porous paper and a region of surrounding air. The governing equations include overall mass conservation, momentum conservation, conservation equations ...

Computer-aided Design of the Heating Section of a Continuous Kheer (Rice Pudding)-making Machine

S. Kadam[1], T. Gulati[2], A. Datta[1]
[1]Indian Institute of Technology, Kharagpur, India
[2]Cornell University, Ithaca, NY, USA

Kheer is a popular Indian dairy dessert prepared from concentrating milk with simultaneous cooking of rice grains. Conventional methods of preparing kheer have limited its mechanized production. Therefore, a conceptual design of continuous kheer-making machine has been prepared which among other components consists of a heating section for cooking kheer. The present study investigates the CFD ...

Model of a Heavy Metal Adsorption System using the S-Layer of Bacillus Sphaericus

J. Orjuela, and A. González
Dept. de Ingeniería Química Facultad de Ingeniería
Universidad de los Andes
Bogotá
Colombia

A bidimensional and pseudo homogenous model was proposed for the study of mass transfer in the bioadsorption process of chromium VI in the S-layer of immobilized Bacillus sphaericus in a packed column. The implementation of such a model in COMSOL Multiphysics will be explained in detail and the final results presented. These include chromium concentration profiles along the column and its ...

Actively Controlled Ionic Current Gating In Nanopores

G. Zhang[1], S. Bearden[1]
[1]Clemson University, Clemson, SC, USA

It is necessary to understand and control nanopore behavior in order to develop biosensors for a variety of applications including DNA sequencing. The fluidics of nanopore devices we fabricated exhibits a range of interesting phenomena, such as enhanced conductance and current rectification. By electrically biasing nanopores, we were able to actively control the nanopore conductance in real time ...

用于TRISO燃料颗粒性能多物理场耦合分析的COMSOL模型

李伟 [1],
[1] 中国核动力研究设计院,成都,中国

TRISO(TRistructure ISOtropic)燃料颗粒不仅是在役高温气冷堆燃料元件的核心部件,同时也是下一代用于水冷反应堆的全陶瓷微密封(FCM)耐事故燃料(ATF)元件的关键组成部分。TRISO燃料颗粒由内核部分和包覆层两部分组成,其中内核部分包括球形UO2或UN燃料核芯和包围核芯的疏松热解碳缓冲层,包覆层由内向外依次为内致密热解碳层(IPyC层)、碳化硅层(SiC层)和外致密热解碳层(OPyC层)。基于COMSOL Multiphysics®多物理场耦合有限元软件开发了TRISO燃料颗粒的三维热学-力学-裂变产物扩散耦合分析模型,详细考虑了材料物性参数随温度、快中子注量、各向异性系数和燃耗等因素的变化,热膨胀,燃料核芯的密实和肿胀,Buffer层、IPyC层和OPyC层辐照变形,SiC层、IPyC层和OPyC层辐照蠕变,Buffer层与IPyC层之间的间隙导热 ...

Simulation Of A Hydrogen Permeation Test On A Multilayer Membrane

J. Bouhattate, E. Legrand, A. Oudriss, S. Frappart, J. Creus, and X. Feaugas
Laboratoire d’Etude des Matériaux en Milieu Agressif, LEMMA, Bat. Marie Curie, La Rochelle, France

To understand a metal susceptibility to Hydrogen Embrittlement (HE), it is important to quantify the diffusion of hydrogen through a metallic membrane. Electrochemical permeation tests are the most common methods for experimentally determining the diffusion coefficient of a metal. However the parameters directly accessible from experiments are the time required for a stream to be observed and ...

A Multiphase Porous Medium Transport Model with Distributed Sublimation Front to Simulate Vacuum Freeze Drying

A. Warning[1], J. M. R. Arquiza[1], A. K. Datta[1]
[1]Cornell University, Ithaca, NY, USA

A continuum, porous medium formulation with non-equilibrium sublimation was developed and validated for freeze drying without and with uniform microwave volumetric heating. The model incorporates the effect of Knudsen flow at low pressure and low permeability freeze drying. The distributed, non-equilibrium sublimation demonstrated that the sublimation front is a sharp boundary for high ice ...