In questa sezione troverete i lavori presentati alle Conferenze mondiali COMSOL. Le presentazioni descrivono ricerche e prodotti innovativi progettati con COMSOL Multiphysics da colleghi di tutto il mondo. I temi delle ricerche presentate abbracciano un'ampia gamma di settori produttivi e aree applicative, in ambito elettrico, meccanico, fluidodinamico e chimico. Lo strumento di Ricerca Rapida vi permetterà di trovare le presentazioni che si riferiscono all'area di vostro interesse.

Turbulent Compressible Flow in a Slender Tube

K.O. Lund[1], C.M. Lord[2]
[1]Kurt Lund Consulting, Del Mar, CA, USA
[2]Lord Engineering Corp., Encinitas, CA, USA

Pressure-drop experiments were conducted for the turbulent, compressible flow of air in a small, slender tube, and modeled with COMSOL heat transfer module, and analytically. A scalar integration variable is introduced which integrates the mass velocity [kg/m²s] over the inlet area and iteratively equates this to the input mass flow [kg/s]. For computation, the temperature specification is ...

A study on Spray Drying in Food Industry

S. Singh[1], N. Baheti[1], A. Tiwari[1]
[1]Institute of Engineering & Science, IPS Academy, Indore, Madhya Pradesh, India

Spray drying is a common drying technique in food industries to convert liquid to powder form. A good understanding on the dynamic behavior of the process is important to ensure proper control. The aim of this study is to develop empirical models for spray drying of whole milk powder and orange juice powder. A preliminary study on the effect of several inputs such as inlet air temperature, feed ...

Inverse Problem and a New Device to Estimate Thermal Conductivity of Composite Phase Change Material

M. Karkri [1], A. Nachaoui [2]
[1] Université Paris-Est, CERTES, Créteil Cedex, France
[2] Département de Mathématiques 2, Nantes Cedex, France

A new experimental device has been developed in order to characterize the phase change material (PCM) thermal properties (thermal conductivity k, sensible and latent heat thermal energy storage, cp and Lf) in the solid phase, during the solid-liquid transition and in the liquid phase. It allows to measure cylindrical samples of maximum 60 mm radius and 10 mm thick. A typical measurement consists ...

Heat Pipe Assisted Thermal Management of an HT PEMFC Stack

E. Firat[1], G. Bandlamudi[1], M. Crisogianni[1], P. Beckhaus[1], A. Heinzel[1]
[1]Centre for Fuel Cell Technology (ZBT), Duisburg,NRW, Germany

Heat management is crucial for the satisfactory operation of HT-PEM (High temperature polymer-electrolyte-membrane) fuel cells. Current work investigates the use of heat pipes in a HT PEMFC stack consisting of 24 cells, each with an active area of 300 cm^2. Heat pipes are known to be thermal superconductors operating on the principles of high convective heat transfer and phase transition. ...

An Integrated Numerical-Experimental Approach for Heat Transfer Analysis of Industrial Furnaces

G. Petrone[1], A. Adorisio[2], S. Adorisio[2], M. Calderisi[3], A. Cecchi[3], M. Scionti[1], F. Turchi[3]
[1]BE CAE & Test, Catania, Italy
[2]Gadda Industrie, Ivrea, Italy
[3]Laboratori Archa, Pisa, Italy

This paper deals with an integrated numerical and experimental analysis work aiming at the investigation of the thermal distribution inside an industrial furnace built for metal materials treatments. The main goal of the research is to find the geometrical and/or functional parameters responsible for a not homogeneous thermal distribution inside the internal volume of the furnace. During the ...

Multiphysics and Simulation of MEMS based Bolometer for Detecting the Radiations in Nuclear Power Plants

K. Umapathi[1], S. Swetha[2], K. Ranjitha[2], K. Vinodh[2], K. Deebiga[1], R. Harisudarsan[1]
[1]United Institute of Technology, Coimbatore, TamilNadu, India
[2]Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu, India

High performance micro sensors are important to detecting special nuclear materials radiations in different fields to save the globe. This paper is mainly focused on to develop a MEMS based bolometer for detecting the nuclear radiation to provide the high security in Nuclear power Plants. A thermally sensitive micro metal plate is designed and placed on a substrate through micro thermal link. ...

Numerical Modeling of the Original and Advanced TEMKIN Reactor for Catalysis Experiments in Laboratory Scale - new

D. Götz[1], M. Kuhn[1], P. Claus[1]
[1]Ernst-Berl-Institute/Chemical Technology II, Darmstadt, Germany

Many industrial, especially heterogeneously catalysed, processes are characterised by a strong interaction between the reaction kinetics and transport phenomena. Because experiments in laboratory scale can be very time- and cost-intensive, Temkin and Kul’kova developed a new reactor design for the direct testing of industrial catalysts. Based on this concept of linearly alternating catalyst and ...

Thermal Analysis for the Solar Concentrating Energy and Induction Heating for Metals

A. Rojas-Morín[1], Y. Flores-Salgado[2], A. Barba-Pingarrón[1], R. Valdéz-Navarro[1], F. Mendéz[1], O. Alvarez-Brito[3], M. Salgado-Baltazar[1]
[1]Facultad de Ingeniería, Universidad Nacional Autónoma de México, Ciudad Universitaria, D.F. México
[2]DGTIC, Universidad Nacional Autónoma de México, Ciudad Universitaria, D.F. México
[3]Programa de Posgrado en Ingeniería, Universidad Nacional Autónoma de México.

In this paper, we simulated the heating of a work piece by coupling two heat sources. Concentrated solar energy was applied at the bottom of the work piece, which generated a heat flux from the parabolic solar dish concentrator. Subsequently, induction heating was applied, which generated Eddy currents that circulated through the work piece and heated the surface of the material. A numerical ...

Several Benchmarks for Heat Transfer Problems in COMSOL Multiphysics®

S. Titarenko[1]
[1]University of Leeds, Leeds, United Kingdom

Nowadays all branches in modern science and industry tend to solve ever complicating problems. As the result the computational time increases considerably and it become very important to reduce the processing time and use available resources more efficiently. Parallelizing problem proves itself as efficient way to overcome the described problem. In the poster we compare different methods of ...

Study of the Process, Design, and Operating Parameters Effect on the Efficiency of the Process Mill - new

A. K. Farouk[1]
[1]Department of Mathematics & Natural Science, University of Stavanger, Sandnes, Rogaland, Norway

This study is to investigate the velocity pattern and the velocity magnitude of the cuttings that is being processed in the process mill as a result of the rotating hammers. The process mill consists of a horizontal cylindrical shell equipped with renewable liners and rotating hammers for milling of drill cuttings. An F.E model of the process mill was constructed using dimensions similar to ...