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.

Modeling of Asphaltenes and Oil Shale Pyrolysis - new

J. P. Mmbaga[1], F. Munoz[2], S. Dhir[1], R. Gupta[1], R. E. Hayes[1], M. Toledo[2]
[1]University of Alberta, Edmonton, AB, Canada
[2]Departamento de Ingenieria Mecanica, Universidad Tecnica Federico Santa Maria, Valparaiso, Chile

Pyrolysis is a key step in the conversion of carbonaceous materials into useful products. In this study, we investigate the pyrolysis of asphaltene and oil shale, both experimentally and numerically. COMSOL Multiphysics® software is used to model the combined effects of fluid flow in porous media, mass transfer of species, heat transfer, and reaction kinetics. Gas evolution and the porosity ...

Prediction of Magnetic Fields, Eddy Currents, and Loads in a Tokamak During a Disruption for Alcator C-Mod's Advanced Outer Divertor - new

J. Doody[1], B. Lipschultz[2], R. Granetz[1], W. Beck[1], L. Zhou[1], J. Irby[1]
[1]Massachusetts Institute of Technology, Plasma Science and Fusion Center, Cambridge, MA, USA
[2]York Plasma Institute, University of York, Heslington, York, UK

COMSOL Multiphysics® has been used to predict the magnetic fields, eddy current, lorenz forces and stresses during a disruption for the new Advanced Outer Divertor for the Alcator C-Mod tokamak. A tokamak is used to study magnetic confinement of plasma for fusion, and a disruption occurs when the plasma decays, rapidly losing all of its current. COMSOL has been used to recreate the fields ...

Numerical Evidence of Unrest-Related Electromagnetic Effects in the Campi Flegrei Caldera, Italy

G. Perillo [1], G. De Natale [2], M. G. Di Giuseppe [2], A. Troiano [2], C. Troise [2],
[1] University of Naples Parthenope, Naples, Italy
[2] INGV – Osservatorio Vesuviano, Naples, Italy

Electric, magnetic and electromagnetic (em) methods are widely used to monitor active volcanoes. A review of such applications is presented in Johnston (cit). Em signals were recorded in correspondence of numerous volcanic eruptions, for example in the case of the Mt. Unzen in Giapppone, of Merapi in Indonesia, Etna in Italy and during rapid deformation in Long Valley in California. ...

Simulation Tests of the Constitutive Equation of a Nonlinear Viscoelastic Fluid

A. Czirják [1], Z. Kőkuti [1], G. Tóth-Molnár [1], G. Szabó [1], P. Ailer [2], L. Palkovics [2]
[1] University of Szeged, Szeged, Hungary
[2] Kecskemét College, Kecskemét, Hungary

The determination of the constitutive equation of a nonlinear viscoelastic fluid is a challenging task, especially if a space-dependent equation is needed [1]. In this contribution, we present simulations of certain rheometry tests of a high-viscosity nonlinear viscoelastic fluid with a rotational rheometer [2]. We compare the measured values with the computed values of a few selected ...

COMSOL Multiphysics® 在热发电用真空集热管设计中的应用

赵旭山 [1], 郝雷 [1], 蒋利军 [1], 米菁 [1], 杨海龄 [1],
[1] 北京有色金属研究总院,北京,中国

随着能源紧张、油价攀升,环境污染严重,利用可再生绿色能源又成为不懈努力的方向。槽式太阳能热发电技术具有兼容性强、对电网冲击小、性价比高、发电成本低、可存储可调度等特点,近年来得到了迅猛发展,其核心部件为高温太阳能真空集热管,如图1所示。本研究利用 COMSOL Multiphysics® 针对真空集热管真实工况下的动态过程开展研究,并在此基础上开展集热管结构的优化设计。 由图1可知:集热管在电站中服役工况下,槽面会聚的太阳光主要集中于集热管下半面,上半面接收的会聚太阳光较少;导热工质自吸收管一端进入,接收会聚太阳光辐照能量,从吸收管另一端流出,流入→流出过程中,导热工质被加热;集热管外表面与外部环境通过热辐射和对流两种方式换热;吸收管与玻璃罩管间形成的环形密闭高真空区域各内表面通过热辐射换热,不考虑对流;集热管两端支撑固定于聚光器上,由于本身自重和热应力 ...

Thermo-Fluid Dynamic Modeling of Cu Based Metallic Foams for Heat Exchanger Applications

C.A. Biffi[1], A. Tuissi[1]
[1]National Research Council of Italy, Lecco, Italy

In this work the innovative concept is the use of a Cu based metallic foam, characterized by open cell structure, as active element for heat exchangers. The metallic foam, produced by liquid infiltration method, was introduced inside a Cu tube, as base element for the exchanger. In the configuration under investigation, an moist air flow at few hundreds of degrees passes through the metallic ...

Multiphysics: Fluid Mixing and Brine Pool Formation for Economic Geology Applications - new

C. Schardt[1]
[1]University of Minnesota-Duluth, Duluth, MN, USA

Significant submarine mineral deposits form when hot, metal-laden, saline fluids emerge onto the seafloor and mix with ambient seawater. Resulting density changes of fluid mixtures can trigger fluid buoyancy reversals, brine pool formation, and metal accumulation (Figure 1). While some of these processes are known from experiments, the inception, development, and physical-chemical processes ...

Modelling of Reactive Non-Isothermal Mixture Flow and its Simulation in COMSOL Multiphysics® Software - new

V. Orava[1,2], O. Soucek[1], P. Cedula[2]
[1]Charles University in Prague, Prague, Czech Republic
[2]Zurich University of Applied Sciences, Winterthur, Switzerland

I introduce a model of fluidized reactor which, in presence of heterogeneous platinum-based catalyst, decomposes liquid formic acid producing gaseous mixture of carbon dioxide and hydrogen as the product. I treat the physical system as a (Class II) mixture of four constituents - namely formic acid (FA), Platinum micro-pellets (Pt), carbon dioxide (CO_2) and hydrogen (H_2) - which can be, without ...

COMSOL in a New Tensorial Formulation of Non-Isothermal Poroelasticity

A. Mario-Cesar Suarez[1], and V. Fernando Samaniego[2]

[1]Faculty of Sciences, Michoacan University, Morelia, Mich., Mexico
[2]Faculty of Engineering, National University of Mexico, Mexico City, Mexico

The presence of a moving fluid in a porous rock modifies its mechanical response. Poroelasticity explains how the fluid inside the pores bears a portion of the total load supported by the rock. The remaining part of the load is supported by the elastic skeleton, which contains a laminar fluid coupled to the framework by equilibrium and continuity conditions. This work introduces an original ...

Microwave Heating Simulation of Frozen Pie - new

F. Chen[1], T. Gulati[1], H. Zhu[1], A. K. Datta[1]
[1]Cornell University, Ithaca, NY, USA

This research studies the thermal effect of frozen pie heating in the microwave oven. Considering as composite material, the properties of pie derived based on its composition. Here the package, susceptor’s influence to the temperature distribution is also studied.