Understanding the Magnetic Field Penetration in Mesoscopic Superconductors via COMSOL Multiphysics® Software - new
I. G. de Oliveira
Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ, Brazil
Introduction: One of the main characteristic of the superconductors is its diamagnetic response of applied magnetic fields. The superconductors refuse the penetration of magnetic field into its interior, it is the well know Meissner effect, B=0 into the superconductor sample. However when the applied field reach a determined value, the magnetic field can enter. There are two different ways of ...
E. C. Santos, J. H. Sales, C. Lima
Universidade Estadual de Santa Cruz, Ilhéus, BA, Brazil
Instituto Federal da Bahia, Irecê, BA, Brazil
This paper compares the efficiency of a vertical solar dryer vis-à-vis the traditional drying method by the means of a computer simulation. The said program considers geometric, thermal and mechanical effects so as to simulate heat transfer via conduction, convection and radiation. We later ran additional tests with simulated data on the greenhouses(traditional method) so as to compare the ...
Finite Element Analysis of Transient Ballistic-Diffusive Heat Transfer in Two-Dimensional Structures - new
S. Hamian, T. Yamada, M. Faghri, K. Park
University of Utah, Salt Lake City, UT, USA
Lund University, Lund, Sweden
University of Rhode Island, Kingston, RI, USA
For the last two centuries, the conventional Fourier heat conduction equation has been used for modeling a diffusive nature of macroscale heat conduction by considering the energy conservation and Fourier's linear approximation of heat flux. However, it cannot accurately predict heat transport when the length scale is comparable to or smaller than the mean free path of thermal energy carriers or ...
M. J. Hancock , N. Elabbasi ,
 Veryst Engineering, LLC., Needham, MA, USA
Organ-on-a-chip microdevices combine microfluidics, MEMS, and biotechnology techniques to mimic the multicellular architectures, tissue-tissue interfaces, physicochemical microenvironments, and vascular perfusion of the body. Such devices are being developed to provide better levels of tissue and organ functionality compared with conventional cell culture systems, and have great potential to ...
P. Zilio , W. Raja , A. Alabastri , R. Proietti Zaccaria 
 Istituto Italiano di Tecnologia, Italy
 Istituto Italiano di Tecnologia, Italy
 Rice University, USA
The formation of space charge clouds is a well known problem that affects thermionic emitters in regimes of high current emission. Although some analytical models have been presented, suitable for 1D geometries, the modeling of the problem in complex 3D structures remains a challenge due to the mutual coupling between electron trajectories and field they produce. Here we propose a model able to ...
V. Bruyere , C. Touvrey , P. Namy 
 SIMTEC, Grenoble, France
 CEA DAM, Is-sur-Tille, France
The formation of porosities in spot laser welding depends on complex thermo-hydraulic phenomena. To understand and control these mechanisms, the COMSOL Multiphysics® software is used to model both the interaction and cooling stages of an isolated impact made with a Nd:YAG pulsed laser. The model is based on the Phase Field method in order to apprehend the evolution of the liquid-gas interface ...
L. Helmich, A. Huetten
Bielefeld University, Bielefeld, Germany
Thermography measurements on metallic thin films are challenging due to reflections from the environment. We present a thin "gold black" absorption layer to deal with this issue. A multiphysics model is introduced to correct the experimentally obtained data for undesirable heat transfer effects between the metallic sample and the absoption layer.
Diffusion and Reaction in Fe-Based Catalyst for Fischer-Tropsch Synthesis Using Micro Kinetic Rate Expressions - new
A. Nanduri, P. L. Mills
Department of Chemical & Natural Gas Engineering, Texas A&M University, Kingsville, TX, USA
Fischer-Tropsch synthesis (FTS) is a highly exothermic polymerization reaction of syngas (CO+H2) in the presence of Fe/Co/Ru-based catalysts to produce a wide range of paraffins, olefins and oxygenates, often known as syncrude. Multi-Tubular Fixed Bed Reactors (MTFBR) and Slurry Bubble Column Reactors (SBCR) are widely employed for FTS processes. The scale-up of MTFBR is complicated by the ...
V. S. Kshirsagar, P. M. Pawar
SVERI's College of Engineering, Pandharpur, Maharashtra, India
Effective suspension and settling are critical for controlling biomass retention in a biogas digester. This paper developed a Computational Fluid Dynamics (CFD) model to simulate the hydrodynamic characteristics of multiphase flow in biogas digester. This is carried out by using COMSOL Multiphysics® software for understanding the behavior of slurries of different viscosity. This study helps to ...
A. Pezzin, M. Giansetti, A. Ferri
Politecnico di Torino, Torino, Italy
Electric resistances are widely used as heating elements in domestic and industrial equipment; since process water contains calcium carbonate and calcium bicarbonate, limescale plays an important role on global efficiency of water-heating systems. Calcium carbonate has a very low thermal conductivity (2.2 W/(m*K)) and the carbonate deposit on the heating element causes a decrease of the overall ...