Technical Papers and Presentations

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.

Tilted Micro Air Jet for Flow Control

J. Malapert[1], R. Yahiaoui[1], R. Zeggari[1], and J-F. Manceau[1]
[1]Institut Femto-St, Université de Franche-Comté Besançon, France

In this paper, we present an interesting method to microfabricate a tilted micro air jet generator. We used the well-know Deep Reactive Ion Etching (DRIE) technique in order to realize in a silicon substrate a double side etching. For aircraft and cars, micro air jets will take an important place for fluid control. Micro air jets are characterized by their speed, frequency and tilt. Usually, this ...

Impact of Velocity and Interfacial Tension on the Performance of Horizontal Wells in Gas Condensate Reservoirs

P. Ghahri, M. Jamiolahmady, and M. Sohrabi
Heriot Watt University, Edinburgh, United Kingdom

Drilling horizontal wells (HWs) has recently received renewed attentions with the increasing trend in exploitation of tight gas reservoirs. An accurate estimation of productivity of such systems using a numerical simulator is a challenging task, because its 3D simulation requires a fine grid exercise to capture the abrupt variation of fluid and flow parameters around the wellbore. This is ...

Three Dimensional Numerical Study of the Interaction of Turbulent Liquid Metal Flow with an External Magnetic Field

G. Pulugundla[1], M. Zec[2], and A. Alferenok[3]
[1]Institute of Thermodynamics and Fluid Mechanics, Ilmenau University of Technology, Ilmenau, Germany
[2]Department of Advanced Electromagnetics, Ilmenau University of Technology, Ilmenau, Germany
[3]Electrothermal Energy Conversion Group, Ilmenau University of Technology, Ilmenau, Germany

Lorentz Force Velocimetry (LFV) is a non-contact measurement technique used to determine flow rates in electrically conducting fluids by exposing the flow to an external magnetic field and measuring the Lorentz force acting on the magnet system. Typically, for LFV applications real and complex permanent magnet systems with inhomogeneous magnetic fields interact with the fluid. In this paper, ...

A Simplified Numerical Model for Simulating Sliding Door and Surgical Staff Movement in an Operating Theater

C. Balocco[1]
[1]Dipartimento di Energetica, Università di Firenze, Firenze, Italy

This paper deals with a numerical investigation on sliding door and people moving effects on the indoor climate of a standard ISO5 class OT with an ultraclean air filter system and a total ceiling unidirectional diffuser. A simple method to analyze the effects on the OT climate by different sliding door conditions combined with crossing persons and persons with a stretcher crossing is provided. ...

Assessment of Anterior Spinal Artery Blood Flow following Spinal Cord Injury

M. Alshareef[1], A. Alshareef[2], V. Krishna[3], M. Kindy[3], T. Shazly[4]
[1]College of Medicine, Medical University of South Carolina, Charleston, SC, USA
[2]Department of Biomedical Engineering, Duke University, Durham, NC, USA
[3]Department of Neurosurgery, Medical University of South Carolina, Charleston, SC, USA
[4]Department of Mechanical Engineering, University of South Carolina, Columbia, SC, USA

The incidence of spinal cord injury (SCI) in the US is approximately 12,000 individuals annually, due to various forms of trauma and disease. Diminished flow over a prolonged period of time can cause permanent spinal damage. We constructed a 3D finite element model of the spinal cord to examine the role of compressive loading on spinal blood flow. It was found that the type of forces on the ...

Thermal Adversity in Solid-State Lighting

T. Dreeben[1]
[1]OSRAM SYLVANIA, Beverly, MA, USA

COMSOL Multiphysics is used to simulate natural convection and its impact on peak operating temperatures of solid-sate lighting in thermally adverse conditions. PDE modes in the general form are used in conjunction with a thin-surface conduction formulation in the weak form. COMSOL is used to predict both temperatures and heat flows through numerous components of the configuration. Model ...

Annealing Furnaces Modelisation for Photovoltaïc Applications

J. Givernaud[1]
[1]EMIX, St Maurice La Souterraine, France

The optimisation of dimensions, materials choice of heaters in annealing furnaces are done with COMSOL Multiphysics® in 2D-axisymetry. Heat losses sources are identified and corrective actions can be taken in function of simulation results. A power saving of more than 50% is achieved thanks to simulations.

Numerical Investigation for the Effect of Guide Panel on Heat Transfer from Steel Containment

Priyanshu Goyal[1], I. Thangamani[1], V. Verma[1], V.M. Shanware[1], R. K. Singh[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

In a nuclear reactor, the containment is the last barrier for the release of radioactivity during severe accident conditions. Containment material can be concrete or steel or steel-lined concrete. Steel containments have a high load bearing capacity and a high degree of leak tightness at higher pressures. In case of a severe accident, heat can be removed from the containment by a guide panel, ...

Simulations of Micropumps Based on Tilted Flexible Structures - new

M. J. Hancock[1], N. H. Elabbasi[1], M. C. Demirel[2]
[1]Veryst Engineering, LLC, Needham, MA, USA
[2]The Pennsylvania State University, University Park, PA, USA

Pumping liquids at small scales is challenging because of the principle of reversibility: in a viscous regime, the flow streamlines through a fixed geometry are the same regardless of flow direction. Recently we developed a class of microfluidic pump designs based on tilted flexible structures that combines the concepts of cilia (flexible elastic elements) and rectifiers (e.g., Tesla pump). We ...

Modeling of Coupled Fluid Flow and Shear-induced Solidification Kinetics in Rheocasting of Aluminium Alloys

G. Maizza, and G. Lorenzatto
Politecnico di Torino
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica
Torino, Italy

The model proposed by Schneider et al., for polymers is herein adapted in order to assess its suitability in elucidating the thixotropic behavior of aluminum alloys. The COMSOL Multiphysics program is employed to solve the inherent coupled mathematical problem, consisting in the kinetic ordinary differential equations and the momentum and energy transport partial differential equations. The ...

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