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Suchbegriff:

Modeling Microwave Heating During Batch Processing of a Liquid Sample in a Single Mode Cavity

S. Curet [1], F. Bellicanta Begnini [1], O. Rouaud [1], L. Boillereaux [1]
[1] L’UNAM Université, ONIRIS, CNRS, GEPEA, Nantes, France

The use of microwaves for heating purposes of dielectric materials is encountered in many industrial applications (food processing, chemistry, material engineering and medical applications). In most of these thermal applications, the prediction of the temperature evolution within the ... Mehr lesen

Thermal Performance of the New Bioclimatic Hall of the Historical Hospital in Florence

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

The main aim of the present work is the study of the thermal and energy performances of the new hall of the Old St.Maria Nuova Hospital in the center of Florence (Italy). Transient simulations were carried out of the 3D model of the hall to analyse the air flow patterns, distribution and ... Mehr lesen

Estimation of Fluid Pressure in the Process of Magneto-rheological Flow Finishing

S. Chothe[1], P. Ranjan[1], Dr. P.M. Pawar[1], A.B. Shinde[1]
[1]SVERI's College of Engineering, Pandharpur, Maharashtra, India

This paper presents the 3D model of pressure distribution in the process of magneto-rheological flow finishing. The effect of working gap on pressure distribution is studied using COMSOL Multiphysics® software. Also, the effect of different viscosity of fluids on development of pressure ... Mehr lesen

Numerical Aspects of the Implementation of Artificial Boundary Conditions for Laminar Fluid-Structure Interactions

C. Boeckle[1], P. Wittwer[1]
[1]University of Geneva, Geneva, Switzerland

We discuss the implementation of artificial boundary conditions for stationary Navier-Stokes flows past bodies in the half-plane, for a range of low Reynolds numbers. When truncating the half-plane to a finite domain for numerical purposes, artificial boundaries appear. We present an ... Mehr lesen

Development of a 10 kW Microwave Applicator for Thermal Cracking of Lignite Briquettes

B. Lepers [1], G. Link [1], J. Jelonnek [1]
[1] Karlsruhe Institute of Technology, Institute for Pulsed Power and Microwave Technology, Karlsruhe, Germany

Introduction: The use of microwave energy for thermal cracking (from thermal stress and water pore pressure) of lignite-coal briquettes increases the lignite friability [1] and is beneficial for later chemical treatment inside a gasifier (for methanol production for example). An ... Mehr lesen

Electrostatic Precipitators - Modeling and Analytical Verification Concept

D. Rubinetti [1], Dr. D. Weiss [1], W. Egli [2],
[1] Institute of Thermodynamics and Fluid Engineering, University of Applied Sciences Northwestern Switzerland, Windisch, Switzerland
[2] EGW Software Engineering, Switzerland

Electrostatic precipitators (ESP) are a reliable technology to control emissions of airborne particles in a series of applications such as coal-fired power plants, cement plants or even for domestic fireplaces. Numerical calculations allow further development of electrostatic ... Mehr lesen

Assessment of COMSOL Capabilities to Analyse the Thermo- Hydrodynamic Behaviour of the MSR Core

A. Cammi[1], V. Di Marcello[1], C. Fiorina[1], and L. Luzzi[1]

[1]Nuclear Engineering Division, Department of Energy, Politecnico di Milano, Milano, Italy

The present work is aimed at evaluating the capabilities of COMSOL Multiphysics® to treat heat transfer in Molten Salt Reactors (MSR). The analyzed situation is represented by the molten salt in turbulent regime flowing through a cylindrical channel surrounded by graphite, with both ... Mehr lesen

An MHD Study of the Behavior of an Electrolyte Solution Using 3D Numerical Simulation

L. P. Aoki[1], H. E. Schulz[1], M. G. Maunsell[1]
[1]University of São Paulo, São Carlos, SP, Brazil

This article considers a closed water circuit with square cross section filled with an electrolyte fluid. The conductor fluid was moved using an electromagnetic pump, in which a permanent magnet generates a magnetic field and electrodes generate the electric field in the flow. Thus, the ... Mehr lesen

Acoustic Wave Crack Detection: A First Principles Approach

R. W. Pryor [1],
[1] Pryor Knowledge Systems, Inc., Bloomfield Hills, MI, USA

Crack detection is and has been an active field of exploration, both theoretical and applied for a number of years. It is the belief of this author that the concepts presented herein explore a new methodology for the modeling and the detection of cracks and families of cracks in ... Mehr lesen

Electromagnetic Modeling of a Millimeter-Wavelength Resonant Cavity

J. C. Weatherall [1], J. Barber [1], B. T. Smith [2], J. Greca [1],
[1] Battelle Memorial Institute, Norwell, MA, USA
[2] U.S. Department of Homeland Security, Science and Technology Directorate, Washington, DC, USA

The measurement of dielectric constant at frequencies of 20 GHz or greater is important for specifying the optical properties of materials at millimeter wavelength. One method of measurement uses a resonant cavity containing a sample of the material, and relates the resonant frequency ... Mehr lesen

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