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Hydrodynamic and Thermal Modeling in a Deep Geothermal Aquifer, Faulted Sedimentary Basin, France

E. Malcuit[1], A.L. Gille[1]
[1]CFG Services, Orléans, France

Within projects of geothermal energy, we need hydrodynamic and thermal modeling to forecast the impacts of geothermal deep wells on existing wells. In case of pumping and reinjection of the geothermal fluid in a deep groundwater reservoir, located in a sedimentary basin with lateral and vertical lithology variations and major faults, it is fundamental to understand the behaviour of the ...

Study of Electrochemically Generated Two-Phase Flows

J. Schillings [1], O. Doche [2], J. Deseure [1],
[1] LEPMI, Grenoble, France
[2] SIMAP, Grenoble, France

The dependency of electrochemical processes performances on mass transfer is well-known. Electrolyte flow in the vicinity of electrodes surface can enhance reactions due to increased mass transfer. This flow can be generated by the production of a gaseous phase, leading to a natural bubble-driven convection flow. As a drawback, gas bubbles also modify electrodes active surface and the ...

Efeito da Pulsação do Ar Durante a Fluidização de Partículas de Amido de Milho

G. C. Dacanal [1], M. G. Thomazi [1], R. Ribeiro [1],
[1] Universidade de São Paulo, Faculdade de Zootecnia e Engenharia de Alimentos, Pirassununga, SP, Brasil

Optimization of the Design of a GEM Tracker Based on Gas Flow Simulations with COMSOL

V. De Smet[1], V. Bellini[2], E. Cisbani[3], F. Noto[2], F. Mammoliti[2], C. M. Sutera[4], and M. Mangiameli[4]
[1]Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy; Haute Ecole Paul-Henri Spaak, ISIB, Bruxelles, Belgium
[2]Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy; INFN – Sezione di Catania, Catania, Italy
[3]INFN – Sezione di Roma - Sanità Group, Roma, Italy; Italian National Institute of Health, Roma, Italy
[4]INFN - Sezione di Catania, Catania, Italy

A Computational Fluid Dynamics study has been performed for a Gas Electron Multiplier (GEM) detector of high energy charged particles, currently under development as part of a new tracker of the high luminosity spectrometers in Hall A at Jefferson Lab. By gradual modifications of the geometry simulated in COMSOL, the design of the frame separating two GEM foils has been optimized with the aim ...

SD Numerical Simulation Technique for Hydrodynamic Flow Gas-Solids Mixing

I. Mantilla[1], S. De Vicente[2]
[1]National University of Engineering, Lima, Perú
[2]Polytechnic University of Madrid, Madrid, Spain

We formulate a new mathematical model of gas-solids mixing hydrodynamic flow [1] in a combustion chamber with a fluid bed system used in the combustion of mineral coal waste. This model in study is called Model Gas-Solids Mixing and it is constructed by averaging the conservation equations (mass and momentum) for a two-phase flow, which takes into account the existence of a small parameter rho ...

Validation for a Quick and Reliable Procedure for Centrifugal Pumps Using Frozen Rotor Methodology in COMSOL Multiphysics®

D. Manenti[1], G. Tanghetti[1], R. Roveglia[1]
[1]Metelli SPA, Cologne (BS), Italy

Single stage centrifugal pumps are widely used in several engineering fields such as: room conditioning, energetic cycles, automotive industry, home care, etc. Thus, the possibility of simulate their behaviour, in terms of pressure increase and mass flow rate, is helpful in reducing prototyping costs in the first design stages. The Rotating Machinery Interface is a dedicated tool implemented ...

Numerical Investigation of Strouhal Frequencies of Two Staggered Bluff Bodies

Eswaran M[1], P. Goyal[1], Anu Dutta[1], G.R. Reddy[1], R. K. Singh [1], K.K. Vaze[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

A 2-D unsteady viscous flow around two cylinders is studied by numerical solutions of the unsteady Navier-Stokes equations with a finite element formulation using COMSOL Multiphysics®. The results of a numerical investigation of the Strouhal frequencies of two identical, stationary, parallel circular cylinders arranged in staggered configurations is presented in this paper. A simple two cylinder ...

Passive Indirect Evaporative Cooler - new

F. F. Dall'Agnol[1], A. Pavani[1]
[1]Center for Information Technology Renato Archer, Campinas, SP, Brazil

Evaporative coolers are viable alternative to air conditioners because of their low power consumption. However, in tropical humid environments the increased humidity that accompanies the cool air in the evaporative coolers causes an uncomfortable wet feeling, since it hinders the evaporation of our natural transpiration. Here we test a configuration of evaporative cooler called Indirect Cycle ...

Transient Model of a Fluorine Electrolysis Cell

J. Vukasin [1], I. Crassous [1], B. Morel [1], J. Sanchez-Marcano [2], P. Namy [3]
[1] HRP, AREVA NC, France
[2] Institut Européen des Membranes - CNRS, France
[3] Simtec, France

In the nuclear fuel cycle, fluorine is produced by the electrolysis of the molten salt KF-2HF. It is a complex process to study since hydrofluoric acid and fluorine are hazardous and highly corrosive. A 3D-model of a lab-scale fluorine electrolysis cell has been developed to increase our understanding of this process, using the electric currents and the bubbly flow interfaces to simulate the ...

Effect of Permeability Diminution in Nutrient Diffusion in Intervertebral Disc

M. A. Chetoui [1], O. Boiron [2], A. Dogui [3], V. Deplano [2],
[1] Université de Monastir, Ecole Nationale D'ingénieurs de Monastir; Ecole centrale Marseille, Marseille, France
[2] Aix-Marseille Université, CNRS, Ecole Centrale, Marseille, France
[3] Université de Monastir, Ecole Nationale D'ingénieurs de Monastir, Marseille, France

Intervertebral discs (IVD) are fibro-cartilages situated between vertebrae providing their joint flexibility. They play a major role in the transmission and absorption of load through the spine. The disc can undergo progressive structural and quantitative changes in its composition and morphology related to mechanical load applied to the spine which can lead to disc degeneration; this disease is ...