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.
COMSOL News Magazine 2017

COMSOL Multiphysics® Simulation of 3D Single-Phase Transport in a Random Packed Bed of Spheres - new

A. Dixon[1]
[1]Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA

Packed beds are important in the chemical industries. Computational fluid dynamics (CFD) can simulate detailed flow and scalar transport in packed beds for improved understanding and quantitative information. We present simulations of single-phase gas flow, conjugate heat transfer and isothermal dispersion of mass in a 3D model of a randomly-packed bed (tube-to-particle diameter ratio = 5.96) of ...

Claus Process Reactor Simulation

J. Plawsky[1],
[1]Rensselaer Polytechnic Institute, Troy, NY, USA

A model was developed to simulate the reaction, concentration field, flow field, and temperature distribution inside a Claus reactor for converting hydrogen sulfide to sulfur. The model considered two ideal reactors, a continuous stirred tank reactor and a plug flow reactor. As expected, two ideal reactors showed much different behaviors in terms of reactant conversion and operating ...

Hydrodynamics and Mass Transfer in Taylor Flow

F. L. Durán Martínez [1], A. M. Billet [1], C. Julcour-Lebigue [1], F. Larachi [2],
[1] Toulouse University, Toulouse, France
[2] Laval University, Quebec, Canada

In the present work, numerical simulations of a Monolith Reactor (MR) are carried out in order to develop a pre-design tool for industrial-scale reactors applied to highly exothermal reactions. The reacting circular channels (2-4 mm internal diameter) are coated with a few micron thick catalytic layer (washcoat), and host a gas-liquid segmented flow (the so-called Taylor flow) known to enhance ...

Developments in a Coupled Thermal-Hydraulic-Chemical-Geomechanical Model for Soil and Concrete

S.C. Seetharam[1], D. Jacques[1]
[1]Performance Assessments Unit, Institute for Environment, Health and Safety, Belgian Nuclear Research Centre (SCK•CEN), Mol, Belgium

This paper documents current status in the development of a coupled thermal-hydraulic-chemical-geomechanical numerical suite within COMSOL-MATLAB environment to address soil and concrete applications. The mathematical formulations are based on well-established continuum scale models unifying mass conservation, energy conservation, charge conservation, thermodynamic equilibrium and kinetics and ...

Modeling Scheil Cooling of a Metal Alloy: Thermodynamic and Multiphysics Solidification

T. Marin-Alvarado [1],
[1] M4Dynamics, Toronto, ON, Canada

During solidification of a multicomponent liquid, either a metal alloy, a sulphide matte or an oxide slag system, the process is highly dependant not only on temperature but in composition as well. The thermodynamic properties of the system will dictate what phases or mixtures precipitate from the liquid and their compositions, which are different from the original composition of the liquid, ...

Modelagem da Perda de Umidade da Banana Durante o Processo de Secagem

J. P. Wojeicchowski [1], A. P. Ramos [2], J. S. Sousa [1], L. G. Maciel [1], M. M. Pariona [1],
[1] Universidade Estadual de Ponta Grossa, Ponta Grossa, PR, Brasil
[2] Universidad Peruana Unión, Juliaca, Peru

O objetivo deste trabalho foi modelar a perda de umidade de bananas Caturra com os modelos empíricos e com o software COMSOL Multiphysics, definindo os coeficientes convectivo de transferência de massa e difusivo. O valor obtido para coeficiente de difusão, com base no ajuste matemático da 2ª Lei de Fick para cilindros foi de 1,89.10-9 m²/s. O valor do coeficiente convectivo de transferência de ...

Photo-Biological Reactor for Organic Waste Consumption and Hydrogen Production - new

L. F. de Souza[1]
[1]Universidade Federal do Paraná, Curitiba, Paraná, Brazil

A simple steady-state photo-fermentative biochemical model was developed using the COMSOL Multiphysics'® Transport of Diluted Species physics interface. A dimensionless model seeks optimal physical parameters based on given biochemical parameters found in literature. A parametric sweep of the physical parameters is enabled without altering the mesh. Other limitations can be easily added to this ...

An Equivalent Kd-based Radionuclide Transport Model Implemented in COMSOL Multiphysics® Software

O. Silva [1], E. Abarca [1], J. Molinero [1], U. Kautsky [2]
[1] Amphos 21 Consulting, Barcelona, Spain
[2] Swedish Nuclear Fuel and Waste Management Co., Stockholm, Sweden

Radionuclide sorption is often simulated using a lumped approach where retention processes are represented by the distribution coefficient (Kd), which relates the radionuclide mass retained in the solid phase to its aqueous concentration. Classical Kd-based simulations rely on two strong assumptions: Kd depends on soil properties and is constant in time. However, sorption processes depend also ...

Modeling Heat and Moisture Transport During Hydration of Cement-Based Materials in Semi-Adiabatic Conditions - new

E. Hernandez-Bautista[1,2], D. Bentz[1], S. Sandoval-Torres[2], P. Cano-Barrita[2]
[1]National Institute of Standards and Technology, Gaithersburg, MD, USA
[2]Instituto Politécnico Nacional/CIIDIR Unidad Oaxaca, Oaxaca, México

The process of accelerated curing of pre-cast concrete has a significant importance in the thermal behavior of concrete. A multiphysics model that describes hydration and heat and mass transport in cement based materials was developed. The hydration reactions are described by a maturity function that uses the equivalent time concept, thereby describing the change in the degree of hydration based ...

Simulation of Gas/Liquid Membrane Contactor with COMSOL Multiphysics®

N. Ghasem[1], M. Al-Marzouqi[1], N. Abdul Rahim[1]
[1]UAE University, Al-Ain, United Arab Emirates

A comprehensive mathematical model that includes mass and heat transfer was developed for the transport of gas mixture of carbon dioxide and methane through hollow fiber membrane (HFM) contactor. COMSOL Multiphysics® was used in solving the set of partial, ordinary and algebraic equations. The model was based on "non-wetted mode" in which the gas mixture filled the membrane pores for ...