D. Song, R. Gupta, and Chhabra
West Virginia University, Morgantown, West Virginia, USA
Indian Institute of Technology, Kanpur, India
Heat transfer from a sphere having a uniform temperature and falling axially in a cylindrical tube filled with an incompressible power-law liquid is numerically investigated. The governing equations for simultaneous flow around a confined sphere and heat transfer to power-law fluids were solved numerically using COMSOL Multiphysics. It was found that the wall effects on the mean Nusselt number ...
K. Shahim, J-M. Drezet, J-F. Molinari, S. Momjian, and R. Sinkus
LSMX, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
LSMS, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
University Hospitals of Geneva and University of Geneva, Switzerland
Waves and Acoustics Laboratory, ESPCI, Paris, France
A numerical finite element model of one human brain is built in COMSOL in order to study a particular form of hydrocephalus, the so called Normal Pressure Hydrocephalus (NPH). The geometry of the ventricles and the skull is obtained by Magnetic Resonance Imaging (MRI) and imported in COMSOL Multiphysics. Form the mechanical point of view, the brain parenchyma is modeled as a porous medium fully ...
A. Priarone, S. Lazzari, and E. Zanchini
Dipartimento di Ingegneria Energetica, Nucleare e del Controllo Ambientale, Alma Mater Studiorum - Università di Bologna, Bologna, Italy
The long-term performance of double U-tube Borehole Heat Exchangers (BHEs) is studied numerically by considering three different time-dependent heat fluxes exchanged between each BHE and the ground. Since the temperature distribution along the vertical direction has a negligible influence on long-term BHE performance, the problem is studied by means of a 2D conduction model, where the energy ...
LASA Lab., Milan Dept., Istituto Nazionale di Fisica Nucleare, Milano, Italy
The understanding of quench, or the sudden transition to the normal state of a high-current Superconductor (SC), is fundamental for the design of a SC magnet, and it is widely discussed in the literature. This paper presents some simple COMSOL models, which are compared with well-known approximate formulae and some experimental results. These models allow a more precise description than it is ...
P. Schmitz, A. Cockx, S. Geoffroy, and J. Gunther
Biochemical Engineering Dpt., Université de Toulouse, Toulouse, France
Chemical Engineering Dpt., Université de Toulouse, Toulouse, France
Mechanical Engineering Dpt., Université de Toulouse, Toulouse, France
An undergraduate course is developed to initiate future engineers to multiphysics numerical simulation by approaching concrete cases in various fields such as: heat transfers, fluid flow, mechanics, chemistry and electrostatics. The so called “Virtual Experiments” course consists of four projects given successively to students. Each project lasts about ten hours. The major notions related to ...
Hydro-Mechanical Coupling in Saturated and Unsaturated Soils and its Consequences on the Electrical Behaviour
G. Della Vecchia, R. Cosentini, S. Foti, and G. Musso
DISTR, Politecnico di Torino, Torino, Italy
The consequences of hydromechanical coupling on the electrical conductivity of saturated and unsaturated soils are investigated experimentally and numerically. Simulations of the consolidation problem under vertical load for an elastic medium and of the coupled flow of two immiscible fluids have been performed in order to check the capability of electrical resistivity tomography to reconstruct ...
G. Jehle, D. Kern, and W. Seemann
Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
This paper proposes the design of a 3-Degree of Freedom(DoF) motor based on surface acoustic waves in elastic solids. The rotor is propelled by wave fields, for linear and rotational motion respectively, in the stator, that can be steered by the driving signal of the piezoelectric actuators, which are placed on an elastic plate. The next considerations concern the feasibility of the proposed ...
V. Sharma, S. Narmadha, S.K. Dash, R. Veerasamy, B.K. Nashine, K.K. Rajan, and P. Kalyanasundaram
IGCAR, Kalpakkam, Tamil Nadu, India
Prototype Fast Breeder Reactor (PFBR) is a 500MWe, sodium cooled, pool type, mixed oxide (MOX) fuelled reactor. Sodium flow measurement in various loops of the reactor is of prime importance from the operational and safety aspects. To measure the flow of electrically conducting sodium in large secondary circuit pipes, probe type permanent magnet flowmeters (PTFM) are used. PTFM works on the ...
Modeling of Retinal Electrical Stimulation Using a Micro Electrode Array Coupled with the Gouy-Chapman Electrical Double Layer Model to Investigate Stimulation Efficiency
F. Dupont, R. Scapolan, C. Condemine, J.F. Bêche, M. Belleville, and P. Pham
CEA, LETI, Minatec, Grenoble, France
The electrical stimulation for retinal implant has known significant improvements in the last decades with many implantations and experimentations. The ability to create better controlled and adapted signals to increase the efficiency in stimulation is a major objective. The aim of this study is to develop a numerical platform based on COMSOL Multiphysics to simulate different waveforms. The ...
AkerSolutions, Fornebu, Norway
In COMSOL Multiphysics it is possible to implement and simulate several independent models in parallel. This can be meaningful when the different models are coupled to each other by some kind of interaction. If a part of the geometries is identical in all models, this part can be reduced in that it is implemented in only one of the geometries. In the other geometries only its solution towards ...