Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

Using CFD to Predict the Performance of Innovative Wind Power Generators

D. Allaei[1]
[1]Sheer Wind Inc., Chaska, MN, USA

INVELOX is an innovative wind power generation system as shown in Figure 1. It is comprised of a wind capturing system that accelerates and delivers high kinetic energy wind to a power conversion system placed in the Venturi section of the INVELOX. The objective of this project is to build a full scale model to verify laboratory and field our test data and to utilize the validated model as an ...

Uncertainty Quantification: What it is and Why it is Important for Multiphysics Simulations

P. Qian [1, 2],
[1] University of Wisconsin - Madison, Madison, WI, USA
[2] SmartUQ, Madison, WI, USA

Uncertainty appears in many aspects of physical simulations including stochastic design parameters, hard-to-specify input distributions, probabilistic boundary and initial conditions, and unknown geometries. Uncertainty Quantification (UQ) has emerged as the science of quantitative characterization and reduction of uncertainties in both simulation and test results. Stretching across applied ...

Iterative Learning Control for Spatio-Temporal Repetitive Processes

D. Kowalów [1], M. Patan [1]
[1] Institute of Control & Computation Engineering, Zielona Góra, Poland

Recently, due to the dynamically increasing complexity of modern systems, a strong necessity appears for more systematic approaches to high quality control and process monitoring. Requirements imposed by process control in the area of spatio-temporal physical systems also called distributed parameter systems (DPSs) are associated with using very accurate models in which spatial dynamics cannot ...

CAE-Based Design and Optimization of a Plasma Reactor for Hydrocarbon Processing

C. Soares [1], F. A. Cassini [1], N. Padoin [1],
[1] Universidade Federal de Santa Catarina, Florianópolis, SC, Brasil

Plasma reactors can be applied to the conversion of waste, biomass and fuels to synthesis gas (mixture of hydrogen and carbon dioxide) with efficiencies as higher as 90-95% and low energy demand, depending on the design optimization. In this work, a multi-step approach was applied to the investigation of the main physics involved in a rotating gliding arc (RGA) discharge reactor. COMSOL ...

Reynolds Number Dependent Porous Media Flow Using the Brinkman Equation

R. Rieck[1], A. Bénard[1], and C. Petty[1]
[1]Michigan State University, Michigan, USA

Porous media fluid dynamic modeling has been widely explored and utilized in many academic and industrial applications. Cross flow filtration being one attractive application, whereas the fluid and filtrate flow parallel the porous media, and thereby induce shearing stress along the membrane surface to reduce fouling. In modeling porous media flow, it is common to describe the porous domain by ...

Flare System Pressure Drop Calculations Using COMSOL

K. Alhazza[1], B. Albusairi[1], H. Kamal[1], H.M.S. Lababiedi[1], A.A. Abbas[2]
[1]Kuwait University, Kuwait City, Kuwait
[2]Petrochemical Industries Company, Kuwait City, Kuwait

COMSOL Multiphysics has been used to validate and check the design of a header transporting ammonia gases released from pressure safety valves (PSVs) to the tip of the flare. The header is part of a dedicated flaring system to contain emissions from ammonia storage tanks. The two main challenges are the low relief pressure and high capacity of the system. Another difficulty is the high relief ...

CFD Modeling and Analysis of a Planar Anode Supported Intermediate Temperature Solid Oxide Fuel Cell - new

N. Lemcoff[1], M. Tweedie[2]
[1]Rensselaer Polytechnic Institute Hartford, Hartford, CT, USA
[2]Enthone, West Haven, CT, USA

A planar anode-supported intermediate temperature solid oxide fuel cell operating on syngas fuel at 750°C was analyzed in this study. The effects of varying syngas fuel inlet compositions on species and temperature distributions, water gas shift reaction rate, potential for carbon formation and electrochemistry were considered. A 2-D COMSOL® model was developed which included separate defined ...

Two-phase Flow Calculations in Pore Unit Cells Implementing Mixed FEM/Lattice-Boltzmann Simulators

E. D. Skouras [1][2], A. N. Kalarakis [2], M. S. Valavanides [3], V. N. Burganos [1],
[1] Foundation for Research and Technology, Hellas/Institute of Chemical Engineering Sciences, Patras, Greece
[2] Dept of Mechanical Engineering, TEI of Western Greece, Patras, Greece
[3] Dept of Civil Engineering, Applied Mechanics Laboratory, TEI of Athens, Athens, Greece

In general, macroscopic two-phase flow in porous media is a mixture of connected and disconnected oil flow. The latter is expressed as ganglion dynamics and drop traffic flow, patterns observed experimentally in pore network models [1,2] and real porous media [3,4]. This characteristic was adversely not taken into account in previous modeling approaches. The mechanistic model DeProF [5], ...

Numerical Study of the Controlled Droplet Breakup by Static Electric Fields inside a Microfluidic Flow-focusing Device

Y. Li[1], K. Nandakumar[1], M. Jain[1]
[1]Louisiana State Univeristy, Baton Rouge, LA, USA

Conventional passive microfluidic flow-focusing devices confront difficulties in controlling droplet sizes in dripping regime especially when the dispersed phase has a large viscosity. It is reported that external electric field can be used to manipulate the droplet breakup. In the present study, a computational fluid dynamics based level-set method coupled with perfect dielectric model has been ...

Simulation of Yield-Stress Fluid in a Rotational Rheometer: The Effect of Vane Geometry on the Accuracy of Measured Properties

J. Park [1], A. M. Oliva [1], N. R. Hargrave [1], D. Feys [2],
[1] Department of Chemical and Biochemical Engineering, Missouri University of Science & Technology, Rolla, MO, USA
[2] Department of Civil, Architectural & Environmental Engineering, Missouri University of Science & Technology, Rolla, MO, USA

A rotational rheometer for Self-Consolidating Concrete was simulated as a yield-stress fluid in a 2D geometry. The effect of the vane geometry was investigated by comparing the analytical solutions with the numerical output for flow in the coaxial cylinders. This effect was studied by investigating the torque vs rotational velocity relation, the flow pattern, and the shear stress distribution. ...