Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Finite Element Simulations of Pulsed Thermography Applied to Porous Carbon Fibre Reinforced Polymers - new

G. Mayr[1], B. Plank[1], J. Suchan[1], G. Hendorfer[1]
[1]University of Applied Sciences, Wels, Austria

Porosity in carbon fiber reinforced polymers (CFRP) as shown in figure 1 degrades the engineering performance, especially the interlaminar shear strength [1]. In the aviation industry a porosity level of 2.5 % has become the maximum level of acceptance. The presence of air-filled voids (pores) has strong effects on the thermal diffusivity. Pulsed thermography offers a rapid, non-destructive ...

Improving Heating Uniformity of Dried Fruit in RF Treatments for Pest Control: Model Development and Validation - new

B. Alfaifi[1], J. Tang[2], Y. Jiao[2], S. Wang[3], B. Rasco[2], S. Jiao[2], S. Sablani[2]
[1]King Saud University, Riyadh, Saudi Arabia
[2]Washington State University, Pullman, WA, USA
[3]Northwest A&F University, Yangling, Shaanxi, China

Non-uniform heating is one of the most important challenges during the development of radio frequency (RF) heat treatments for pest control. A computer simulation model using finite element–based COMSOL Multiphysics® software was developed to investigate the heating uniformity of raisins packed in a rectangular plastic container and treated using RF heating. The developed model was then ...

Thermal Simulation of FCBGA Package with Heat Sink

M. R. Naik[1]
[1]Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka, India

In a modern IC design, the capability of predicting the temperature profile is critically important as well as cooling and related thermal problems are the principal challenges. To address these challenges, thermal analysis must be embedded within IC synthesis. This paper presents thermal analysis of the FCBGA chip with a 4mm×4mm×0.3mm silicon die. The silicon die dissipates heat flux of ...

Virtual Modeling of Thermo-Physiological Comfort in Clothing

P. Van Ransbeeck [1], R. Benoot [1], B. Van Der Smissen [1]
[1] University College Ghent, Faculty of Science and Nature, Department of Mechatronics, Belgium

This publication aims to investigate conjugate heat and mass transfer around a clothed virtual manikin. This research can be performed at different scales: (1) at material scale where a piece of textile is investigated in 1D or 2D space or (2) at system level where a clothed cylindrical body (2D) or a complete manikin (3D) is modeled. The work is based on previous methods and results from ...

Laser Assisted Brazing of Titanium to Aluminum Alloy

I. Tomashchuk [1], P. Sallamand [1], M. Duband [1],
[1] Laboratoire Interdisciplinaire Carnot de Bourgogne, Université de Bourgogne-Franche-Comté, Comté, France

Laser assisted brazing with Al-Si fillers in V-shaped groove configuration is a perspective method for joining of aluminum alloys to titanium. The present work introduces multiscale model that allows estimating diffusion process at titanium/melted zone interface in function of thermal history of welded plates. 3D model of heat transfer with moving laser source and fixed geometry is linked to 2D ...

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. ...

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 ...

Analysis of Infrared Signature of a Ship Operating in MIR and FIR Bands

A. Pellegrini[1], A. Beucci[1], and F. Costa[1]

[1]ALTRAN Italia, Pisa, Italy

In this paper a methodology for calculating the infrared signature of complex objects is presented. The transient thermal analysis allows us to evaluate the temperature distribution on the investigated object, pointing out which parts tend to be warmer. These temperature values are handled in the post processing phase in order to evaluate the zero range radiance distribution and the radiance of ...

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 ...