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 abrangem 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.

Modeling Darcian and Non-Darcian Porous Media with COMSOL Multiphysics® Software

A. Kumar [1], S. Pramanik [2], M. Mishra [1],
[1] Indian Institute of Technology Ropar, Rupnagar, Punjab, India
[2] Indian Institute of Technology Ropar, Rupnagar, Punjab, India; Nordita, SE-10691, Stockholm, Sweden

Darcian and non-Darcian porous media are characterized by the porosity of medium. To capture miscible viscous fingering in both types of porous media, a new model built with COMSOL® software is presented by coupling of two different physics interfaces (hydrodynamics and transport of solute). For modeling in non-Darcian porous media, Brinkman equation is used. In our simulations, perturbations ...

CFD Simulation of Pore Pressure Oscillation Method to Measure the Permeability of Tight Formations

M. Mokhtari [1], S. A. Madani [1], A. Seibi [1],
[1] Department of Petroleum Engineering, University of Louisiana at Lafayette, Lafayette, LA, USA

Accurate estimation of rock permeability and porosity play a crucial role in the evaluation of oil and gas reservoirs. This evaluation is, however, challenging in tight formations such as shale due to the slow transition of fluid in such formations with extremely-low permeability. To overcome the long experimental time of conventional technique for permeability measurement (steady-state method), ...

Numerical Quasi Stationary and Transient Analysis of Annular Linear Electromagnetic Induction Pump

L. Goldsteins[1], L. Buligins[2], Y. Fautrelle[3], C. Biscarrat[1], S. Vitry[1]
[1]CEA Cadarache, Saint Paul lez Durance, France
[2]University of Latvia, Riga, Latvia
[3]Grenoble Institute of Technology, Grenoble, France

In this paper an axisymmetric model of annular linear electromagnetic induction pumps using numerical methods and four approaches (two transient and two quasi-stationary) with different complexity is studied. Comparison of integral characteristics is performed between numerical approaches and also with analytic estimations. Distributions of physical parameters over length and height of channel ...

Performance Evaluation of the 19th Century Clipper Ship Cutty Sark: A Comparative Study - new

C. Tonry[1], M. Patel[1], C. Bailey[1], W. Davies[1], J. Harrap[1], E. Kentley[1], P. Mason[1]
[1]University of Greenwich, London, UK

The Cutty Sark, built in 1869 in Dumbarton, is the last intact composite tea clipper ship [1]. One of the last tea clippers built she took part in the tea races back from China. These races caught the public imagination of the day and were widely reported in newspapers [2]. They developed from a desire for ‘fresh’ tea and the first ship to return with the new season’s tea could charge a higher ...

Impact of Electro-Convection (EC) on Heat Transfer in Liquid-Filled Containers

A. Pokryvailo [1],
[1] Spellman High Voltage Electronics Corporation, Hauppauge, NY, USA

Electric field can bring liquid in motion and thus influence heat transfer. Electro-convection (EC) can be caused by electric forces acting on a liquid, even in absence of space charge. Here, we studied heat transfer in a metal vessel filled by oil, with a submersed high voltage electrode serving as source of heat. Physics involved are Electrostatics and Laminar Flow with Heat Transfer. ...

2D Axisymmetric Temperature Profile Modeling of a Delayed Coking Drum During Pre-Run Warm Up

P. H. A. Valenca [1], A. Waturuocha [1], K. Wisecarver [1],
[1] Russell School of Chemical Engineering, University of Tulsa, Tulsa, OK, USA

Delayed Coking is a refining process, which takes heavy petroleum residue as a feed. A 2D axisymmetric stationary model was created to simulate this pre-run condition with nitrogen gas, as an attempt to calibrate the model before simulating with an oil residue. The single-phase laminar flow and the heat transfer in fluids modules were used simultaneously. The results show that the model ...

CFD Analysis of a Printed Circuit Heat Exchanger

K. Wegman [1], X. Sun [1],
[1] Department of Mechanical and Aerospace Engineering, Ohio State University, Columbus, OH, USA

In this experiment, the performance of a Printed Circuit Heat Exchanger (PCHE) was studied using COMSOL Multiphysics® software. PCHEs are diffusion bonded heat exchangers containing semicircular, chemically etched flow paths. Helium was used as the working fluid on both the hot and cold sides. A simplified model was used in the simulation, and the results were compared to experimental results. ...

Reduction of Fluid Forces on a Square Cylinder Using Passive Control Methods

A. Alshayji [1], A. Abograis [1]
[1]Kuwait University, Kuwait City, Kuwait

COMSOL Multiphysics® is used in this study to simulate the flow around a square cylinder and focus on reducing the forces on the cylinder by passive control methods. Numerical simulations are made to find optimum cases of control methods that guarantee maximum reduction for Reynolds number 160 based on the width of the square cylinder (W) and the inlet flow velocity (U_in). The selection of the ...

Optimization of Jet Mixer Geometry and Mixing Studies - new

A. Egedy[1], B. Molnar[1], T. Varga[1], T. Chován[1]
[1]Department of Process Engineering, University of Pannonia, Veszprém, Hungary

The primary aim of using jet as mixer, like in case of other mixing devices, is to increase the heat and mass transfer between the phases. Beside the injection position the geometry of the jet mixer and the injection nozzle has a major effect on the injection. In our study COMSOL Multiphysics software was used to carry out the experimental and simulation of the different jet geometries. The jet ...

Reducing Solar Heat Gain from Inclined Buildings’ Roof by Using Radiant Barrier System

S. Ebrahim[1], A. Alshayji[1]
[1]Department of Mechanical Engineering, College of Engineering and Petroleum, Kuwait University, Kuwait City, Kuwait

The study produced a simulated model of natural convection in an inclined rectangular channel open ended with different locations of radiant barrier (RB) along the channel thickness(S). The upper plate is heated by various uniform constant heat fluxes while the inner surface of the lower plate has a very thin layer with low emissive aluminum foil. This model was used to adjust the location of ...