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.

Understanding the Transition Flow Region through Modeling in COMSOL Multiphysics® Software

J. Sturnfield [1],
[1] Dow Chemical, Freeport, TX, USA

The pore sizes of many membranes being studied for separating the components in gas mixtures are on the scale of nanometers. Depending on the specific gases and pressures being used, this scale will put the flows in the Transition between Slip Flow and Knudsen regime. The differential flow of the gas components gives the relative diffusion of the gases through the membrane. There are a number of ...

Thermal and Fluid-dynamical Optimisation of Passengers Comfort in a Touring Bus Cabin

G. Petrone[1], G. Fichera[2], and M. Scionti[1]
[1]Bus-Engineering S.r.l., Catania, Italy
[2]Department of Industrial and Mechanical Engineering, University of Catania, Catania, Italy

Innovations in air-conditioning and other forms of cooling or ventilation can be viewed as technological solutions improving environmental conditions that are beneficial for human health, comfort and productivity. This study deals with a thermal and fluid-dynamics investigation of passenger comfort in a touring bus cabin. COMSOL Multiphysics® is used as a powerful design and optimization ...

Modelling Flow through Fractures in Porous Media

E. Holzbecher[1], W.L. Wah[1], and M-S. Litz[2]
[1]Georg-August Universität Göttingen, Germany
[2]Freie Universität Berlin, Germany

There are various alternative options concerning modeling fluid flow within fractures in porous media. We give a general overview, with remarks concerning the modeling using COMSOL Multiphysics. Moreover we define and study two test cases for intercomparison. Finally for one of the testcases some results of an extensive sensitivity study is presented.

Comparative Numerical Studies of Scramjet Inlet Performance Using k-? Turbulence Model with Adaptive Grids

V. Gopal[1], R. Kolluru[1]
[1]BMS College of Engineering, Bangalore, Karnataka, India

Scramjet inlet design remains as a key aspect for hypersonic flight. To assess the inlet design, the performance parameters namely; air-capture ratio, total pressure efficiency, inlet drag coefficient, and kinetic energy efficiency are evaluated and analysed. In the current study comparison of performance parameters is carried out by performing numerical computation of 2-D turbulent flow field ...

A COMSOL Multiphysics®-based Model for Simulation of Methane-Hydrate Dissociation by Injection of Superheated Carbon Dioxide

M. Gharasoo[1], C. Deusner[1], N. Bigalke[1], M. Haeckel[1]
[1]Department of Marine Geosystems, GEOMAR - Helmholtz Centre for Ocean Research, Kiel, Germany

Immense amounts of methane are stored as gas-hydrate deposits in deep layers of marine sediments. This has raised considerable interest to develop strategies for producing natural gas from marine hydrates. One potential production strategy is the injection of supercritical CO2 into methane hydrate-bearing sand layers to release the CH4 as a gas and sequester the CO2 as hydrate. We used COMSOL ...

Numerical Investigation of Strouhal Frequencies of Two Staggered Bluff Bodies

Eswaran M[1], P. Goyal[1], Anu Dutta[1], G.R. Reddy[1], R. K. Singh [1], K.K. Vaze[1]
[1]Bhabha Atomic Research Centre, Mumbai, India

A 2-D unsteady viscous flow around two cylinders is studied by numerical solutions of the unsteady Navier-Stokes equations with a finite element formulation using COMSOL Multiphysics®. The results of a numerical investigation of the Strouhal frequencies of two identical, stationary, parallel circular cylinders arranged in staggered configurations is presented in this paper. A simple two cylinder ...

SD Numerical Simulation Technique for Hydrodynamic Flow Gas-Solids Mixing

I. Mantilla[1], S. De Vicente[2]
[1]National University of Engineering, Lima, Perú
[2]Polytechnic University of Madrid, Madrid, Spain

We formulate a new mathematical model of gas-solids mixing hydrodynamic flow [1] in a combustion chamber with a fluid bed system used in the combustion of mineral coal waste. This model in study is called Model Gas-Solids Mixing and it is constructed by averaging the conservation equations (mass and momentum) for a two-phase flow, which takes into account the existence of a small parameter rho ...

Traveling Plasma Wave Levitation of Objects Supported by Coanda Effect - new

R. Eisenschmid[1]
[1]OPTIMA pharma GmbH, Schwäbisch Hall, Germany

Electrostatically excited plasma waves can induce a “plasma wind” in the surrounding media or air. The lifted object has a shape of a flying saucer, just for better illustration. A travelling plasma wave propulsion requires a pre-ionized media around the surface and a travelling electrostatic field. A simplified plasma model was used to set up an EFD (electro fluid dynamic) approach into a ...

Passive Indirect Evaporative Cooler - new

F. F. Dall'Agnol[1], A. Pavani[1]
[1]Center for Information Technology Renato Archer, Campinas, SP, Brazil

Evaporative coolers are viable alternative to air conditioners because of their low power consumption. However, in tropical humid environments the increased humidity that accompanies the cool air in the evaporative coolers causes an uncomfortable wet feeling, since it hinders the evaporation of our natural transpiration. Here we test a configuration of evaporative cooler called Indirect Cycle ...

Numerical Simulation of Granular Solids’ Rheology: Comparison with Experimental Results

A. Zugliano[1], R. Artoni[2], A. Santomaso[2], A. Primavera[1], M. Pavlicevic[1]
[1]Danieli & C. Officine Meccaniche, Italy
[2]DIPIC - Universita di Padova, Italy

A simulation of the behavior of bulk solids continuously flowing through a silo with internal flow feeders has been performed by means of a dissipative hydrodynamic model. The results obtained by these calculations and those found experimentally agree, not only with regard to the velocity profiles, but also relative to the pressure on the silo walls. The dissipative hydrodynamic model represents ...