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.

Investigating the Performance of Mechanically Ventilated Double-Skin Facades with Solar Control Devices in the Main Cavity - new

C. G. Galante[1]
[1]Newtecnic Ltd, London, England, UK

The use of ventilated facades may reduce the cooling and heating energy demands of the building. Double-skin facades (DSFs) belong to the wider group of ventilated facades and currently represent one of the most interesting and studied facade systems. The purpose of this study is to investigate the thermal behaviour and performance of a DSF being designed for a real project in the Middle East ...

Control the Poly-Dispersed Droplet Breakup Mode in a Droplet-based Microfluidic Device by External Electric Field

Y. Li [1], K. Nandakumar [1], M. Jain [1],
[1] Cain Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA, USA

Droplet–based microfluidics has received special research attentions in last two decades due to its superior control over fluid flow as well as other unique advantages[1]. By introducing two immiscible fluids into microfluidic systems, the reagent fluid is encapsulated inside discrete droplets or slugs of nanoliter volume [2]. Interestingly, two breakup modes, termed as “mono-dispersed” and ...

Simulation and Parametric Study of a PDMS Based Valveless Micropump Using FSI Approach

R. R. Gidde [1], P. M. Pawar [1],
[1] SVERI's College of Engineering, Pandharpur, Maharashtra, India

In this paper simulation and parametric study of a PDMS valveless micropump using Fluid-Structure Interaction (FSI) appraoch is presented. The simulation for the valveless micropump were carried out in COMSOL Multiphysics software. In case of a valveless micropump diffuser/nozzle element is connected to a chamber with an oscillating diaphragm. To improve the flow rate of the valveless micropump, ...

Heat Transfer Modeling of Steam Methane Reforming

E. Carcadea[1], M. Varlam[1], I. Stefanescu[1]
[1]National Research Institute for Isotopic & Cryogenic Technologies, Rm.Vâlcea, Romania

Steam methane reforming is a widely studied process because of its importance for hydrogen production. A two-dimensional membrane-reactor model was developed to investigate the steam-methane reforming reactions. The use of membrane as membrane-reactor separator offer us few advantages because it help in continuously removing the hydrogen from the reaction zone, shifting the chemical equilibrium ...

Determination and Verification of the Forchheimer Coefficients for Ceramic Foam Filters using COMSOL CFD Modeling

M.W. Kennedy[1], K. Zhang[1], J.A. Bakken[1], R.E. Aune[1]
[1]Norwegian University of Science and Technology, Trondheim, Norway

Experiments have been conducted with water at velocities from ~0.015-0.77 m/s to determine the permeability of 50 mm thick commercially available 30, 40, 50 and 80 Pores Per Inch (PPI) Ceramic Foam Filters (CFF) used for liquid metal filtration. Measurements were made using two different setups, for use with the Forchheimer equation: 49 mm \"straight through\" and 101 mm diameter \"expanding ...

Gravitational Collapse of Rectangular Granular Piles

M.H. Babaei[1], T. Dabros[2], S.B. Savage[3]
[1]Ocean, Coastal, and River Engineering, National Research Council of Canada, Ottawa, ON, Canada
[2]Natural Resources Canada, CanmetENERGY, Devon, AB, Canada
[3]Department of Civil Engineering & Applied Mechanics, McGill University, Montreal, QC, Canada

In this study, the dam-break type two-dimensional gravitational collapse of rectangular granular piles in air was numerically studied. The frictional behavior of the material was based on the von-Mises model with the Mohr-Coulomb yield surface leading to pressure and strain-rate-dependence of shear viscosity. The governing equations of the problem were solved using the COMSOL two-phase flow CFD ...

Numerical Simulation of Granular Solids’ Behaviour: Interaction with Gas

A. Zugliano[1], R. Artoni[2], A. Santomaso[2], and A. Primavera[1]
[1]Danieli & C. Officine Meccaniche S.p.a., Buttrio, UD, Italy
[2]DIPIC, Università di Padova, Padova, Italy

In previous works a dissipative hydrodynamic model was used to simulate the behavior of a dense granular solid flowing through silos with simple geometries or with internal devices, showing good agreement with experimental results. That model has been upgraded taking into account the interaction between the solid itself and a nonreactive gaseous stream flowing countercurrent through it. This ...

Analysis of Ancient Natural Ventilation Systems inside the Pitti Palace in Florence

C. Balocco
Dipartimento di Energetica “Sergio Stecco”, Università degli Studi di Firenze, Firenze, Italy

This paper presents and discusses the first phase results of a wide ranging project concerning the study and prediction of the efficiency and energy performances of natural ventilation systems existing inside historic buildings. The air flow patterns, air temperature and air velocity distribution inside a historic building in Florence, the Pitti Palace, were studied by a transient simulation. A ...

Modeling Magnetic Configurations for Improved Separations of Magnetic and Non-Magnetic Materials

S. Khushrushahi[1], T.A. Hatton[1], M. Zahn[1]
[1]Massachusetts Institute of Technology, Cambridge, MA, USA

Magnetic separation of magnetic liquid phases/particles from non-magnetic liquid phases/particles are needed for applications such as cleaning up oil spills by separating oil and water liquid phases or separating magnetic materials from non-magnetic materials in biomedical and microfluidic applications. Magnetic fluids (also called ferrofluids), in a magnetic field, experience a magnetic force ...

Effects of Flow and Diffusion on Blood Coagulation in Platelet Poor Plasma: a Two-way Coupling Between Hemodynamics and Biochemistry

D. Magnabosco[1,2], H. van Ooijen[2], B. Bakker[2], R. van den Ham[2]
[1]Politecnico di Milano, Milan, Italy
[2]Philips Research, Eindhoven, The Netherlands

Enzyme reactions, blood flow and diffusion in human vasculature play interacting and fundamental roles in blood coagulation. In this complex mechanism, the balance between blood and clot is a delicate equilibrium, whose tight regulation is vital to avoid pathologies such as bleeding and thrombosis. The secondary hemostasis triggered by tissue factor in platelet poor plasma is studied up to ...