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Ici vous trouverez les présentations issues des Conférences COMSOL à travers le monde. Réalisées par des utilisateurs de COMSOL Multiphysics, ces présentations explorent tous les domaines actuels d'innovation. Les applications couvrent pratiquement tous les secteurs industriels et impliquent des phénomènes électriques, mécaniques, fluidiques et chimiques. Utilisez la recherche rapide pour trouver les présentations les plus intéressantes dans votre domaine d'intérêt.

Modeling of Energy Efficient Continuous Sterilisation of ABP from Food Wastes

S. Dalrymple[1], R. Heslop[1]
[1]C-Tech Innovation Ltd. , Capenhurst, United Kingdom

Ohmic heating is a volumetric heating technology which can effectively process almost any pumpable fluid with extremely high energy efficiency (>95%). This is particularly useful for very thick fluids, those that burn on to hot surfaces and those with high solids content which would cause difficulties for conventional heating techniques. Processing of animal by-products (ABP) faces all these ...

Simulated Rheometry of a Nonlinear Viscoelastic Fluid

A. Czirják[1], Z. Kőkuti[1], G. Tóth-Molnár[1], P. Ailer[2], L. Palkovics[2], G. Szabó[1]
[1]University of Szeged, Szeged, Hungary
[2]Kecskemét College, Kecskemét, Hungary

In certain cases, the accuracy of measurements with a rotational rheometer can be influenced by inefficient thermal management, by the heat generated in the sample, or by rod-climbing due to the Weissenberg effect. We investigate the effect of these phenomena with simulations in COMSOL Multiphysics®. Our model is based on the axial symmetric (2D) formulation of the two-phase flow with the ...

Study of Supercritical Coal Fired Power Plant Dynamic Responses for Grid Code Compliance - new

A. Gil-Garcia[1], I. Kings[1], B. Al-Duri[1]
[1]University of Birmingham, School of Chemical Engineering, Edgbaston, Birmingham, UK

In clean coal technologies, improving energy conversion efficiency is one of the most important directions. Compared to traditional subcritical power plants, pressure-increased supercritical power plants improve the plant energy efficiency from 35% up to 45%. This work presents a study of the thermodynamic behaviour of the water cycle in coal-fired boilers in response to the changes in energy ...

Estimation of Critical Parameters of Drop-Drop Electrocoalescence Using a Multiple-Drop System - new

S. S. Kulkarni[1], V. A. Juvekar[1], A. Chheda[2]
[1]Indian Institute of Technology Bombay, Mumbai, Maharashtra, India
[2]Institute of Chemical Technology, Mumbai, Maharashtra, India

Electrocoalescence is the phenomenon of coalescence of droplets suspended in an insulating liquid or in a gas under the action of an electric field. Electrocoalescence is considered a promising tool in many petrochemical industries for desalting crude oils. However, this technique suffers from some drawbacks such as short circuiting of electrodes, limitations on applied electric field and its ...

Building Energy Simulation Using the Finite Element Method

J. van Schijndel[1]
[1]Eindhoven University of Technology, Eindhoven, The Netherlands

In order to predict, improve and meet a certain set of performance requirements related to the indoor climate of buildings and the associated energy demand, building energy simulation (BES) tools are indispensable. Due to the rapid development of FEM software and the Multiphysics approaches, it should possible to build and simulate full 3D models of buildings regarding the energy demand. The ...

Modelling of a Wool Hydrolysis Reactor - new

M. Giansetti[1], A. Pezzin[1], S. Sicardi[1], G. Rovero[1]
[1]Politecnico di Torino, Torino, Italy

The Life+ GreenWoolF project is aimed at demonstrating that green hydrolysis with superheated water is an effective way to convert wool wastes into organic nitrogen fertilizers. The core of the process is represented by the reaction tank (Figure 1) in which the hydrolyses reaction takes place. The temperature of the material during the reaction is one of the most influencing parameter and has to ...

Fluid Flow Simulation of Preconcentration Membranes Using Finite Elements Tools

R. Inglés[1], J. Pallares[2], J.L. Ramirez[1], and E. Llobet[1]

[1]Dept. of Electronic, Electrical and Automatic Control Engineering, Universitat Rovira i Virgili, Tarragona, Spain
[2]Department of Mechanical Engineering School of Chemical
Engineering Universitat Rovira i Virgili, Tarragona, Spain

We use finite elements simulations in order to study the fluid flow behavior in a chamber of a preconcentrator. We realized that most part of the fluid does not affect our preconcentrator because it is going out the chamber at high distance above it and parallel to the preconcentrator. So, we are wasting most part of our fluid and we need a lot of time to have a good concentrator factor. We ...

Validation of DNS Techniques for Dynamic Combined Indoor Air and Constructions Simulations Using an Experimental Scale Model

T. van Goch, and A. van Schijndel
Eindhoven University of Technology, Eindhoven, Netherlands

This paper presents a study on the application of Direct Numerical Solving (DNS) techniques using an experimental scale model. COMSOL Multiphysics is promising in solving dynamic heat and air transport. The experiments can be extremely useful as benchmark for CFD codes.

Modelling and Simulation of a Three-stage Air Compressor Based on Dry Piston Technology

M. Heidari, and P. Barrade
Lausanne, Switzerland

The core of this modelling is to study heat transfer and fluid dynamics processes for a compression expansion system, and the main particularity is that heat transfer and air movement are due to the movement of the piston. We have implemented a \"moving mesh\" solver to compute the volume changes of the compression chamber followed by a \"Fluid dynamics\" type solver. It allows correct ...

Irrotational Motion of an Incompressible Fluid Past a Wing Section in an Unbounded Region

J. Russell[1]
[1]Florida Institute of Technology, Melbourne, FL, USA

Developers of numerical models who address the title problem face several hurdles, such as: (1), the need to formulate boundary conditions applicable in an unbounded region; (2), The need to specify conditions suitable to ensure a unique solution in a doubly connected region; and (3), The need to allow the interior boundary to have a sharp edge, such as a cusp. The aim of the work reported ...