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 Different Passive Oil-Water Mixing Schemes in a Flow Loop - new

A. Chaudhuri[1]
[1]Materials Synthesis & Integrated Devices, Los Alamos National Laboratory, Los Alamos, NM, USA

Oil and water are immiscible fluids and they tend to separate very easily when introduced into a flow stream from two different sources in a flow loop. This model studies the development of mixture volume fraction in an oil-water-flow loop with 3 different passive mixing schemes: (i) blind-T, (ii) check valve, and (iii) static mixer. Each device produces different levels of mixture homogeneity ...

Cellular Convection in Vertical Annuli at roof slab of Fast Breeder Reactor

M. G. Hemanath[1], C. Meikandamurthy[1], G. Padmakumar[1], C. A. Babu[1], P. Kalyanasundaram[1], and G. Vaidyanathan[1]
[1] Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

In the pool type Fast Breeder Reactors the roof structure is penetrated by a number of pumps and heat exchangers which are cylindrical in shape. Argon gas in reactor is sandwiched between the free surface of sodium and the roof structure and can flow in the annular space between the components and roof structure forming a thermosyphon. These hermosyphons not only transport heat from sodium to ...

Sensitivity Estimation of Permanent Magnet Flowmeter

V. Sharma[1], S. K. Dash[1], G. Vijaykumar[1], B. K. Nashine[1], B. Krishnakumar[1], P. Kalyanasundaram[1], and G. Vaidyanathan[1]
[1]Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India

Permanent Magnet Flowmeter (PMFM) is a non invasive device, which is used to measure the flow of electricallyconducting sodium in Fast Breeder Reactor Circuits. PMFM works on the principle of generation of motional EMF by magnetic forces exerted on the charges in a moving conductor. In this paper modeling of PMFM with different pipe sizes is done to predict the flowmeter output for a given ...

Laminar Thermal Mixing in Coating Flows

A. Haas[1], M. Scholle[1], A. Aksel[1], H.M. Thompson[2], R.W. Hewson[2], and P.H. Gaskell[2]

[1]Department of Applied Mechanics and Fluid Dynamics, University of Bayreuth, Bayreuth, Germany
[2]School of Mechanical Engineering, University of Leeds, Leeds, United Kingdom

Heat transfer in a plane shear flow configuration consisting of two infinitely long parallel plates is considered. In laminar flows over undulated substrates eddies can be generated due to the kinematical constraints. A closed form analytical solution for the velocity field, based on lubrication theory as well as a semi-analytic solution for the temperature field is derived for the creeping ...

Microscale Modelling of the Frequency Dependent Resistivity of  Porous Media

J. Volkmann, O. Mohnke, N. Klitzsch, and R. Blaschek
E.ON Energy Research Center, RWTH-Aachen, Aachen, Germany

The frequency dependent electrical impedance of porous media is studied by modelling the charge transport in the electrolyte filled pore space using COMSOL Multiphysics.  The corresponding experimental method, called Spectral Induced Polarization (or Impedance Spectroscopy), shows a frequency dependent phase shift between a measured electric current and an applied alternating voltage. It is ...

Use of COMSOL Multiphysics® for IAQ Monitoring in Cleanrooms - new

G. Petrone[1], C. Balocco[2]
[1]BE CAE & Test, Catania, Italy
[2]Department of Industrial Engineering, University of Firenze, Firenze, Italy

High levels of Indoor Air Quality (IAQ) in Operating Theatres (OT) is an important issue in order to contribute in prevention of Surgical Site Infections (SSI). Despite of specific plant layouts are applied for OT ventilation (e.g. unidirectional flow), the effective use conditions can heavily modify the design microclimate and air quality levels. Medical staff presence and movements and sliding ...

Design Of A Flat Membrane Module For Fouling And Permselectivity Studies

J.M. Gozalvez-Zafrilla, and A. Santafe-Moros
Universidad Politécnica de Valencia, Valencia, Spain

Flat membrane modules are widely used to study the membrane performance at the laboratory which is influenced by pressure and velocity. Most modules designed for laboratory studies have high pressure drop and abrupt changes of flow direction what yield to lack of uniform flow and pressure uncertainty over the membrane surface. With the aim to minimize these drawbacks, we developed a new module ...

Optimization of the Gas Flow in a GEM Tracker with COMSOL and TENDIGEM Development

F. Noto[1,2], V. Bellini[1,2], E. Cisbani[3,4], V. De Smet[1,5], F. Librizzi[6], F. Mammoliti[1,2], and C. Sutera[6]
[1]Dipart. di Fisica ed Astronomia, Università di Catania, Catania, Italy
[2]INFN – Sezione di Catania, Catania, Italy
[3]IINFN – Sezione di Roma - Sanità Group, Roma, Italy
[4]Italian National Institute of Health, Roma, Italy
[5]Haute Ecole Paul-Henri Spaak, ISIB, Bruxelles, Belgium
[6]NFN - Sezione di Catania, Catania, Italy

The Gas Electron Multiplier (GEM) technology has been proven to tolerate rate larger than 50 MHz/cm2 without noticeable aging and to provide the sub millimeter resolution on working chambers up to 45x45 cm2. A new GEM based tracker is under development for the Hall A upgrade at Jefferson Lab. The chambers of the tracker have been designed in a modular way: each chamber consists of 3 adjacent ...

Dynamic Multi-Phase Modelling and Optimisation of Fluid Jet Polishing Process

A. Beaucamp[2], R. Freeman[2], and Y. Namba[1]
[1]Chubu University, Kasugai, Japan
[2]Zeeko Ltd, Coalville, UK

In the Fluid Jet Method, a polishing fluid is compressed and delivered through a nozzle, allowing the spot area to become continuously replenished with abrasives and coolant. Process parameters include: Abrasive type and concentration, Inlet pressure, Nozzle diameter, Impingement angle, Surface feed of spot. The simulation uses COMSOL’s turbulent 2-phase flow model, with the incompressible ...

COMSOL Simulations for Steady State Thermal Hydraulics Analyses of ORNL’s High Flux Isotope Reactor

P.K. Jain[1], V.B. Khane[2], J.D. Freels[1]
[1]Oak Ridge National Laboratory, Oak Ridge, TN, USA
[2]Missouri University of Science and Technology, Rolla, MO, USA

Simulation models for steady state thermal hydraulics analyses of ORNL’s HFIR have been developed using COMSOL. A single fuel plate and coolant channel of each type of HFIR fuel element was modeled in three dimensions. The standard k-? turbulence model was used in simulating turbulent flow with conjugate heat transfer. The COMSOL models were developed to be fully parameterized to allow ...