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.

Comparison of 2D Conduction Models for Vertical Ground Coupled Heat Exchangers

A. Priarone[1], and S. Lazzari[2]
[1]DIPTEM-TEC, Università di Genova, Genova, Italia; Corresponding Author: a.priarone@unige.it
[2]DIENCA, Università di Bologna, Bologna, Italia

The effect of the infinite length approximation on evaluating the temperature of the surface of Borehole Heat Exchangers is determined by means of COMSOL Multiphysics. In detail, two 2D models of a BHE are compared: in the first model, the domain is represented by a cross-section of the geometry, while in the second model, it is represented by an axial-section of the geometry and, thus, the BHE ...

Effect of Fluid Conditions on Air-Liquid Interface in Hydrophobic Micro Textured Surface

S. Takahashi[1], S. Ogata[1]
[1]Tokyo Metropolitan University Hachioji City, Tokyo, Japan

We studied the influence of a number of gas-liquid interface on the drag reduction effect by numeric simulation. Level set method was used for an analysis of gas-liquid interface. The analytic model is rectangular channel of height h = 5 micrometer and width w = 20 micrometer with two hydrophobic microstructures in bottom of channel. In this channel, we found that the liquid penetrates in the ...

Accelerating R&D with COMSOL: A Personal Account

Erik Birgersson[1]

[1]Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore

This presentation gives an account of how COMSOL Multiphysics® software has helped to accelerate research and development. It has been used to simulate energy systems such as fuel cells, biomedical systems such as hydrogels and human skin, and monolithic catalytic converters. Each of these systems requires a mathematical model that can accurately represent the relevant physics, and which can be ...

Optimization of Mechanical Properties of Superconducting Cavities for Project X LINAC

I. Gonin[1], M. Awida[1], T. Khabiboulline[1], V. Yakovlev[1]
[1]Fermilab, Batavia, IL, USA

Project X is a proposed proton accelerator complex at Fermilab. The CW LINAC is based on five types of resonators operating at three frequencies: half-wave, spoke, and elliptical. The low beam current for the CW operation of Project X requires cavities to operate at a high loaded Q and, thus, narrow bandwidth. Therefore, it requires optimal mechanical design of the cavities to minimize the ...

Evaporation Induced Convection Under a Gas Channel

H. Machrafi[1], A. Rednikov[2], P. Colinet[2], P.C. Dauby[1]
[1]University of Liège, Thermodynamics of Irreversible Phenomena, Institut de Physique, Liège, Belgium
[2]Universite Libre de Bruxelles, TIPs - Fluid Physics, Bruxelles, Belgium

This work falls into the framework of an ESA experiment, which consists of observing the behavior of patterns and structures that can be formed after instability onset in a HFE7100 liquid layer, evaporating into a nitrogen gas flow. This study is performed by a three-dimensional numerical simulation of the transient temperature and fluid motion. The results show that first several small rolls ...

Modeling and Simulation of the Rapid and Automated Measurement of Biofuel Blending in a Microfluidic Device under Pressure Driven Flow using COMSOL Multiphysics®

Sanket Goel[1], Venkateswaran PS[1], Rahul Prajesh[2], Ajay Agarwal[2]
[1]University of Petroleum & Energy Studies, Bidholi, Prem Nagar, Dehradun, India
[2]CSIR - Central Electronics Engineering Research Institute,(CSIR-CEERI) Pilani, India

• Real-time detection and monitoring of bio-fuel blend-ratio and adulterated automobile fuels by a reproducible micro-fabrication process in a cost-and-time efficient manner. • COMSOL Multiphysics® simulations and modelling of Viscosity based Laminar Flow inside a Y-shaped Micro-fluidic Device. • Design and Fabrication of a polymer Y-shaped Micro-fluidic Device to work as Micro-Viscometer for ...

Characterization of the Process of Ultrasound Driven Dispersion of Nanoparticles in High Viscosity Liquids - new

P. Pasumarty[1], H. Choi[1]
[1]Clemson University, Clemson, SC, USA

Even though sonochemical reactors have been studied extensively for decades, there is limited data on their characterization when the volume of the sample is fixed. The Acoustics Module and COMSOL Multiphysics® software are used to resolve the pressure field. The validated numerical model will be used to compare different configurations; changing the Height (H), diameter (D) of the reactor and ...

Simulation of Air Flow Through Ventilation Ducts - new

E. Dalsryd[1]
[1]KTH Royal Institute of Technology, Stockholm, Sweden

In this report I study the airflow through ventilation ducts. By numerical simulation, the so-called k-factor has been estimated. The k-factor is the quotient of the airflow volume and the square root of the pressure drop over the duct. A two dimensional axial symmetric model has been used to simulate an iris damper connected to a straight pipe. A three dimensional model has been used to ...

Temperature and Acceleration Sensitivities of a Dual Cavity Fabry-Perot Interferometer - new

[1]R. K. Banyal
Indian Institute of Astrophysics, Bengaluru, Karnataka, India[1]

The numerical study of temperature and acceleration sensitivities of a dual cavity Fabry-Perot (FP) interferometer is carried out using finite element method. The optical cavities are formed by machining two side-by-side circular bore of 12 mm each on a monolithic block of low expansion material. One cavity will be used to generate broadband channel spectra for accurate wavelength calibration of ...

Lava Tubes at Shallow Depth

M. Di Bari, and G. Zito
University of Bari, Italy

Many theoretical studies concerning lava tubes focus on the thermal disturbances generated on the earth surface. Recently a solution was suggested, where a lava tube located at a great depth h in the soil, where the ratio between h to the major axis of the ellipse a is higher than 10. However, lava tubes more frequently are located at shallower depths.  In this work we ...

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