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Bengaluru 2023

Munich 2023

Computational Fluid Dynamicsx

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., ... Mehr lesen

Dynamic Saturation of TiZrV Layer of Non-Evaporable Getters (NEG) Chamber

M. Ortino [1], J. A. Ferreira Somoza [1], G. Bregliozzi [1]
[1] CERN, Geneva, Switzerland

Non-evaporable getters (NEG) chambers are 316L vacuum chambers coated with a TiZrV layer, widely used in accelerator systems. This particular alloy works, when thermally activated, as a linear pump for almost all gas species inside the chamber: molecules are adsorbed on the surface or ... Mehr lesen

Implementation of a Thermo-Hydrodynamic Model to Predict the Morton Effect

M. Antonini [1], D. Fausti [1], M. Mor [1],
[1] PoliBrixia s.r.l., Brescia, Italy

In this paper, the "Morton Effect" is analyzed. This phenomenon is a particular kind of rotor instability due to non-uniform journal bearing heating. In this paper, an overview of the previous works has been done. After this preliminary study, a specific approach suggested by the ... Mehr lesen

Numerical Study of Hyporheic Flow across Bedforms of Different Type

C. Gualtieri [1],
[1] University of Napoli Federico II, Department of Civil, Architectural and Environmental Engineering (DICEA), Napoli, Italy

Despite the traditional separation between the studies of surface water and groundwater flows, it has been long recognized that rivers and aquifers are strongly connected and that their interaction gives rise to a continuous exchange of water and solutes. The volume within the porous ... Mehr lesen

An Application Built with the COMSOL Multiphysics® Software for Managing Computational Sequences in Thermal Fluid Applications

G. Petrone [1], C. Barbagallo [1],
[1] BE CAE & Test, Catania, Italy

An app built with the COMSOL Multiphysics® software allows both expert and beginner users to carry out parametric simulations thanks to flexible and user-friendly customized interfaces. Many people, with or without expertise in numerical analysis, can now access, exploit and share ... Mehr lesen

Modeling Voltammetry of a Rotating Disk Electrode

A. Giaccherini [1], A. Lavacchi [2],
[1] INSTM, Firenze, Italy
[2] ICCOM - CNR, Firenze, Italy

In this work we report a numerical model of a Rotating Disk Electrode (RDE) voltammetry in a finite size domain. Thus, explaining the discrepancy of the diffusion coefficient obtained from the experimental rotating speed, with respect to the literature data. We achieved a very good ... Mehr lesen

Computational Analysis of Hydrodynamics and Light Distribution in Algal Photo-Bioreactors

V. Loomba [1], E. von Lieres [1], G. Huber [1],
[1] Forschungszentrum Jülich, Jülich, Germany

Microalgae can be directly used in health food or as biofilters for waste water treatment. They also have numerous commercial applications in cosmetics, aquaculture and chemical industry as a source of highly valuable molecules, e.g., polyunsaturated fatty acids, and they are ... Mehr lesen

A Modified Koutecký-Levich Equation for the Analysis of Electrochemical Flow Cells with Complex Geometries

S. A. Tschupp [1], S. E. Temmel [1], N. Poyatos Salguero [1], J. Herranz [1], T.J. Schmidt [2],
[1] Paul Scherrer Institut, Villigen, Switzerland
[2] ETH Zürich, Zürich, Switzerland

Electrochemical flow cells have found widespread use in analytical chemistry due to their short response time, high sensitivity and selectivity. The geometrical flexibility and therefore, the ease of coupling the electrochemical to other experimental techniques has attracted considerable ... Mehr lesen

Simulating Organogenesis with COMSOL Multiphysics® software: Phase-Field Based Simulations of Embryonic Lung Branching Morphogenesis

L. D. Wittwer [1], R. Croce [1], D. Iber [1],
[1] ETH Zürich, Zurich, Switzerland

While many biological details in organogenesis have been uncovered, fundamental questions regarding the control of growth and shape during lung and kidney morphogenesis remain unsolved. Using mathematical models, we recently showed that only ligand-receptor based Turing models ... Mehr lesen

Melt Homogenization Improvement By Optimizing the Rotation Profile

J. Petit [1], V. Tabouret [1], B. Viana [2],
[1] ONERA, Chatillon, France
[2] IRCP/CNRS, Paris, France

During the last decades, mid-IR (3-12µm) laser sources have attracted attention due to their potential applications in different fields like infrared counter-measures (e.g: missile jamming) and remote chemical sensing. In this context, Onera has been working on the development of non ... Mehr lesen

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