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Investigating the Performance of Mechanically Ventilated Double-Skin Facades with Solar Control Devices in the Main Cavity - new

C. G. Galante[1]
[1]Newtecnic Ltd, London, England, UK

The use of ventilated facades may reduce the cooling and heating energy demands of the building. Double-skin facades (DSFs) belong to the wider group of ventilated facades and currently represent one of the most interesting and studied facade systems. The purpose of this study is to investigate the thermal behaviour and performance of a DSF being designed for a real project in the Middle East ...

Simulation of Interstitial Nanoparticle Flow for Development of Tumor-On-A-Chip Device

J. Park [1], M. P. Vidal-Meza [1], R. Zhou [1], S. Barua [1], C. Wang [1],
[1] Missouri University of Science & Technology, Rolla, MO, USA

A simulation was performed to investigate the flow behaviors of drug delivery nanoparticles in a tumor-on-a-chip microfluidic device, which mimics a tumor cell having endothelial cells with micro-sized gaps. The Navier-Stokes equation and the convection-diffusion equation were used to model the flow field and the time-dependent particle distribution in the device, respectively. We investigated ...

On The Modelling Of Electrowetting Using COMSOL Multiphysics

J.F. Dannenberg, J. Brinkert, and E.A.D. Lamers
Reden b.v., Hengelo (ov.), The Netherlands

One of the upcoming technologies in displays is that of the electrowetting displays. A surface can be covered by a colored oil or transparent water using a voltage to increase or decrease the wettability of the surface. A simulation of the behavior of such a thin film of oil in water, forced to move due an electrostatic field, has been made using the level-set, two-phase flow application mode ...

Investigation of Reverse ElectroDialysis Units by Multi-Physical Modelling

L. Gurreri [1], F. Santoro [1], G. Battaglia [1], A. Cipollina [1], A. Tamburini [1], G. Micale [1], M. Ciofalo [1],
[1] Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica (DICGIM), Università degli Studi di Palermo (UNIPA), Palermo, Italy

Salinity gradient represents an interesting renewable energy source. Reverse ElectroDialysis (RED) is an ion exchange membrane-based process that convert directly the salinity gradient energy into electric current. Thereby, two solutions at different concentrations are fed into two series of alternated channels. As various physical phenomena occur in RED units and affect the process performance, ...

Acoustic Scattering through a Circular Orifice in Low Mach Number Flow

S. Sack [1], M. Abom [1]
[1] KTH, the Royal Institute of Technology, Stockholm, Sweden

The acoustic scattering through a circular orifice plate in a duct with low Mach number flow (M=0.1) is computed using the Linearized Navier-Stokes physics interface of COMSOL Multiphysics®. The work by Kierkegaard et al. is extended to account for higher order acoustic modes, i.e., behind the cut-on frequency of the first radial duct mode. Orifice flows tend to create a sharp separation zone at ...

Studying Magnetohydrodynamic Effects in Liquid Metal Flow Under Transverse Magnetic Field Using COMSOL Multiphysics®

S. Sahu[1], R. Bhattacharyay[1], E. Rajendrakumar[1]
[1]Institute for Plasma Research, Bhat, Gandhinagar, India

Liquid metals are foreseen as a multipurpose coolant in fusion blanket systems. However, the strongly magnetic environment of the fusion reactor hinders the regular flow of the liquid metal. It interacts with transverse magnetic field and produces a Lorentz force opposing the flow, modifying the regular flow profile in the circular pipe or rectangular ducts. Complex geometry and lack of ...

Comparison Between Turbulent and Laminar Bubbly-Flow for Modeling H2/H2O Separation

E. Amores Vera[1], J. Rodríguez Ruiz[1]
[1]Centro Nacional del Hidrógeno, Puertollano, Spain

One of the most critical aspects on water electrolysis is gas-liquid separation, especially in systems with forced convection. The main problem of this kind of circulation is that a gas fraction could return to the electrolysis circuit. A suitable design of separator devices could be a solution in order to avoid a gas return to the electrolysis circuit. In this sense, the use of deflectors might ...

Keyhole Behavior During Spot Laser Welding

V. Bruyere [1], C. Touvrey [2], P. Namy [1]
[1] SIMTEC, Grenoble, France
[2] CEA DAM, Is-sur-Tille, France

The formation of porosities in spot laser welding depends on complex thermo-hydraulic phenomena. To understand and control these mechanisms, the COMSOL Multiphysics® software is used to model both the interaction and cooling stages of an isolated impact made with a Nd:YAG pulsed laser. The model is based on the Phase Field method in order to apprehend the evolution of the liquid-gas interface ...

Optimization of the Herringbone Type Micromixer Using Numerical Modelling and Validation by Measurements - new

E. Tóth[1], K. Iván[1], P. Fürjes[2]
[1]Pázmány Péter Catholic University, Budapest, Hungary
[2]Research Centre for Natural Sciences Institute for Technical Physics and Materials Science Hungarian Academy of Sciences, Budapest, Hungary

COMSOL Multiphysics® software was used in this study to simulate mixing by diffusion and by secondary flow. Particle tracing model was applied to simulate the mixing of cells in the microchannel. Results agreed well with the measurement, an optimal herring-bone structure was proposed for integration into a bioanalytical system.

Simulation of Mass Transfer in a Microfluidic Experiment Using the Moving Mesh Method - new

K. Weisbrod[1], R. Roberts[1], R. Chamberlin[1], S. Yarbro[1]
[1]Los Alamos National Lab, Los Alamos, NM, USA

Multiphase flow in a microreactor was studied numerically for two immiscible liquids. Validation of the model was sought by simulating the flow behavior and mass transfer characteristics of a neutralization reaction described in the literature. Contact angles, interfacial tension and the pressure field defined the interfacial boundary configuration. After first performing simulations to capture ...