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.

Thermal Analysis of a Piezo-Disk Ultrasound Probe

L. Spicci[1], M. Cati[1]
[1]Esaote, Firenze, Italy

Ultrasound imaging probes are widely used for several types of diagnosis applications. In the present work we focus our attention on a disk-type probe, which is widely used in CW and PW operating conditions. In particular we present a 2D-axial symmetry FEM for the probe, capable to predict both the operative temperature values at different driving signal frequencies, both the heating dynamics. ...

3D Simulation of Air-Glass Heat Exchange in a Set of Vials

G. Mongatti[1], A. Borelli[1]
[1]Marchesini Group, Pianoro, Italy

In this model a three-dimensional heat transfer analysis was performed by using COMSOL Multiphysics\' Heat Transfer Module. The model is about the heating of a set of vials (Figure 1) in a current of hot air in the laminar regime. We used time dependent studies to predict the thermal behavior of the glass and to estimate the temperatures in the various points of the bottles at various times. ...

Numerical Simulation of Temperature and Stress Fields in the Rock Heating Experiment

P. Rálek[1], M. Hokr[1]
[1]Technical University in Liberec, Liberec, Czech Republic

Presented work is motivated by pre-realization phase of rock heating experiment in underground, testing properties for cyclic energy storage. Heating unit, installed in large borehole from end of a tunnel, is fixed to the rock face with the geo-polymer. Rest of the borehole is filled with isolation material. We used the Heat Transfer Module and the Structural Mechanics Module in COMSOL for ...

Numerical Simulation of Flow Electrolysers: Effect of Various Geometric Parameters

P. Shukla[1], K. K. Singh[1], P. K. Gupta [1], S. K. Ghosh[1]
[1]Bhabha Atomic Research Centre, Trombay, Mumbai, India

Flow electrolysers find several applications in industry. They are used for production of metals and synthesis of chemicals, gases. Cleaning and preservation of old artifacts, electrolytic refining of metals, electrolytic winning of metals, alkaline water electrolysis, anodization, electrometallurgy, electroplating, electrolytic etching of metal surfaces are other industrial applications of flow ...

Electromagnetic Wave Analysis of Wave And Shielded Stripline

S. Singh[1], A. Marwaha[1]
[1]Department of Electronics and Communication Engineering, Sant Longowal Institute of Engineering Technology Longowal, Punjab, India

Electromagnetic wave analysis of waveguide has been done in this paper with the help of Finite Element Method (FEM) based COMSOL Multiphysics. The design is further extended by placing conductor on a dielectric slab included in the waveguide to form a shielded microstrip transmission line. The simulated models are analyzed to determine the wave propagation characteristics. The validation is ...

Design and Simulation of Sensors to Detect Methanol

C. K. Subramaniam[1], Muthuraja[1]
[1]School of Electronics Engineering, VIT University, Vellore, Tamil Nadu, India

The Direct Methanol Fuel Cell (DMFC) working is dependent on the concentration of methanol in water before it is introduced in the anode. DMFC has a high energy density when generating electrical power from fuel, and is an attractive power source for portable devices. A fundamental limitation in DMFC technology is methanol crossover. In this process methanol diffuses from the anode through the ...

Miscible Viscous Fingering: Application in Chromatographic Columns and Aquifers

S. Pramanik[1], G. L. Kulukuru[1], M. Mishra[1]
[1]Indian Institute of Technology Ropar, Rupnagar, Punjab, India

When a less viscous fluid displaces a more viscous one in a porous medium or Hele-Shaw cell, the interface between the two miscible fluids does not remain flat and deforms into fingers growing in time [1]. It occurs due to the faster movement of less viscous fluid than the more viscous one, for a given pressure gradient. Fingering affects in aquifers, in packed bed reactors, and detrimental to ...

Design and Simulation of Valveless Piezoelectric Micropump

L. Nayana[1], P. Manohar[1], S. Babu[1]
[1]Department of Electrical Engineering, Visvesvaraya Technological University, Bangalore, Karnataka, India

In this paper some discrete parts of a valveless piezoelectric micropump for drug delivery system is designed and simulated. The core components of the micropump are actuator unit that converts the reciprocating movement of a diaphragm actuated by a piezoelectric actuator into a pumping effect and Nozzle/diffuser elements that are used to direct the flow from inlet to outlet. Simulations are ...

Design Optimization of Waveguide Applicator for Microwave Hyperthermia Cancer Treatment

P. Kumar [1], S. Kalra[1], A. Marwaha[1]
[1]Department of Electronics and Communication Engineering, Sant Longowal Institute of Engineering Technology Longowal, Punjab, India

The optimized design of a waveguide applicator has been proposed for superficial microwave hyperthermia using COMSOL Multiphysics 3.5a. In microwave hyperthermia cancer treatment body tissue is exposed to high temperatures using external and internal heating devices. Non-Invasive or external hyperthermia is used to treat tumors that are in or just below the skin (superficial). Non-invasive ...

Property and Performance Prediction of Meta Composites for Novel Applications

C. Thiagarajan[1]
[1]ATOA Scientific Technologies Private Limited, Whitefield, Bangalore 560066, India.

Metacomposites are new class of materials with unusual properties that can be engineered using existing materials with usual properties. The unusual properties of metacomposites are derived from the structure, analogues to atomic arrangement in crystal lattice. These material exhibits unusual negative refraction type behavior to electromagnetic wave propagation and thus enables novel ...

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