In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

Modeling of Transport Phenomena in Laser Welding of Steels

A. Métais [1], S. Matteï [2], I. Tomashchuk [2], S. Gaied [1]
[1] ArcelorMittal, Montataire, France
[2] Laboratoire Interdisciplinaire Carnot de Bourgogne, Université Bourgogne Franche Comté, France

Laser Welded Blank solutions enable to reduce vehicles weight and to optimize their crash performances by means of simultaneous tuning of different grades and thicknesses. The present work aims to characterize numerically and experimentally materials mixing during laser welding. For better understanding of materials mixing based on convection-diffusion process in case of full penetrated laser ...

COMSOL Multiphysics® Simulation of Flow in a Radial Flow Fixed Bed Reactor (RFBR)

A. G. Dixon [1], D. S. Polcari [1], A. D. Stolo [1], M. Tomida [1],
[1] Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA

For design of radial flow fixed bed reactors, it is important to ensure proper flow distribution through the catalyst bed. A 2D axisymmetric model of a radial-flow reactor was used to evaluate flow maldistribution through the catalyst bed and the pressure drop through the reactor for a specified flow rate. Effects of different catalysts, screen sizes and flow direction were simulated. Factors ...

Non-isothermal Flow of CO2 in Injection Wells: Evaluation of Different Injection Modes

O. Silva [1],
[1] Amphos 21 Consulting S.L., Barcelona, Spain

Injection conditions of CO2 at the wellhead may play a major role on the flow behavior through the wellbore. The density and the injection rate reached at the bottomhole are key factors affecting the performance and efficiency of CO2 geological storage. In this work, a model of non-isothermal flow of CO2 in injection wells is developed using COMSOL Multiphysics® software and used to assess ...

Understanding the Transition Flow Region through Modeling in COMSOL Multiphysics® Software

J. Sturnfield [1],
[1] Dow Chemical, Freeport, TX, USA

The pore sizes of many membranes being studied for separating the components in gas mixtures are on the scale of nanometers. Depending on the specific gases and pressures being used, this scale will put the flows in the Transition between Slip Flow and Knudsen regime. The differential flow of the gas components gives the relative diffusion of the gases through the membrane. There are a number of ...

Hydrodynamic Modeling of a Rotating Cone Pump Using COMSOL Multiphysics® Software

P. L. Mills [1], A. Uchagawkar [1], M. Vasilev [1],
[1] Texas A&M University - Kingsville, Kingsville, TX, USA

Introduction Velocity profiles in liquid films flowing over rotating conical surfaces are of considerable interest in industry. The efficiency of important process equipment, such as spinning cone columns, fluid degassers, centrifugal disc atomizers, centrifugal film evaporators, and rotating packed bed reactors, is greatly influenced by the nature of the fluid velocity distributions. Conical ...

Simulation of Droplet Impingement on a Solid Surface by the Level Set Method - new

J. Hu[1], R. Jia[1], K. Wan[2], X. Xiong[3]
[1]Department of Mechanical Engineering, University of Bridgeport, Bridgeport, CT, USA
[2]Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA
[3]Department of Electrical Engineering, University of Bridgeport, Bridgeport, CT, USA

The dynamic behavior of droplet impingement on a solid surface is important to many engineering applications. This paper studied the dynamic behavior of a droplet impinging onto solid dry surfaces with different surface wettability using the COMSOL Multiphysics® software. The simulation results were validated against experimental results. It was found that the Level Set method can predict the ...

Simulating the Electrical Double Layer Capacitance

G. Zhang
Clemson University, Clemson, SC, USA

When a solid surface makes contact with a liquid medium, an electrical double layer (EDL) structure forms spontaneously through thermodynamic interaction between electrons and ions. In this study, we developed a computational model using commercial finite element analysis package COMSOL Multiphysics to simulate the double layer structure and quantify the EDL capacitance for the first time. In ...

Novel Approach for Teaching Microchemical Systems Analysis to Chemical Engineering Students Using Interactive Graphical User Interfaces (GUIs)

A. Nagaraj [1], P. L. Mills [1],
[1] Department of Chemical and Natural Gas Engineering, Texas A&M University - Kingsville, Kingsville, TX, USA

Chemicals are an integrated part of our daily life. While chemicals are significant contributor to a nation’s economy, sound management of chemical production is essential for environmentally friendly operation without maximizing operational costs. Next generation technologies must be developed that potentially change the chemical plants and process engineering giving rise to safe, compact, ...

A Wall-Cooled Fixed-Bed Reactor Model for Gas-Phase Fischer-Tropsch Synthesis

A. Nanduri [1], P. L. Mills [1],
[1] Department of Chemical and Natural Gas Engineering, Texas A&M University - Kingsville, Kingsville, TX, USA

In the early 1920’s, Gas-To-Liquids (GTL) and Coal-To-Liquids (CTL) technologies were developed to account for the depleting crude oil resources [1]. During this period, Franz Fischer and Hans Tropsch developed a process to convert synthesis gas (syn gas), derived from coal gasification, to a wide range of high value-added products. This process later came to be known as Fischer-Tropsch (F-T) ...

Modeling of Residual Stresses in a Butt-welded Joint with Experimental Validation

V. Srivastava [1],
[1] Naval Materials Research Laboratory (NMRL), Defence Research and Development Organization (DRDO), Ambernath, Thane, Maharashtra, India

2D-modeling of arc welding in butt-joint configuration was performed in this study considering thermal-structural interactions. Thermal behavior was modeled in COMSOL Multiphysics® using the Heat Transfer Module with weld heat input as a Gaussian pulse whereas structural behavior using Structural Mechanics Module. Thermal-elastic-plastic behavior model based on Von Mises yield criteria and ...