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Role of the Diffusion Current in Nonequilibrium Modeling of Welding Arcs - new

M. Baeva[1]
[1]INP Greifswald e.V., Greifswald, Germany

2D self-consistent nonequilibrium model of a free-burning arc in argon has been developed. The model is based on the COMSOL Multiphysics® platform and describes in a self-consistent manner the fluid dynamics, the heat transfer, the magneto-electrodynamics, and species conservation. The governing equations are solved applying the COMSOL Multiphysics® interfaces Laminar flow, Electric Currents, ...

Thermo-fluiddynamic Modeling of Laser Beam-Matter Interaction in Selective Laser Melting

K.-H. Leitz [1], P. Singer [1], A. Plankensteiner [1], B. Tabernig [1], H. Kestler [1], L. S. Sigl [1],
[1] Plansee SE, Reutte, Austria

Selective Laser Melting (SLM) offers great potential for future manufacturing technology. In order to extend its applicability for the processing of high melting materials like molybdenum fundamental process understanding is required. This can be obtained by multiphysical simulations that allow a look into the process. In this contribution a thermo-fluiddynamical simulation model for laser beam ...

CFD Modeling for the Ventilation System of a Hospital Room

A. Kermani [1],
[1] Veryst Engineering LLC, Needham, MA, USA

Indoor ventilation with good air quality control prevents infection with minimizing the spread of airborne respiratory and other infections in hospitals. CFD can be utilized to optimize flow pattern in clean rooms especially hospital clean rooms. More than two million people in Europe are infected due to Health-care Associated Infection (HAI) (Pittet et al., 2005). It is believed that transfer ...

COMSOL Multiphysics® Software and PV: A Unified Platform for Numerical Simulation of Solar Cells and Modules

M. Nardone [1],
[1] Bowling Green State University, Bowling Green, OH, USA

Introduction: Existing solar cell (photovoltaic, PV) device simulation software is either open source with limited capabilities (1D only) [1,2] or extremely expensive with obscure functionality [3]. PV researchers need an accessible and versatile simulation tool to optimize existing technologies and to reduce the time from concept to prototype for new technologies. This work demonstrates how ...

Modeling Metamaterials with a Time-Domain Perfectly Matched Layer Formulation

H. Assi [1], R. S. C. Cobbold [1],
[1] University of Toronto, Toronto, ON, Canada

INTRODUCTION: Perfectly matched layers (PML) have been widely used for simulating wave propagation in unbounded media to effectively avoid spurious wave reflections from the computational domain boundaries. Time-domain PML formulations, especially for elastic waves, usually use a complex system of first-order equations. Compact second-order time-domain formulations are particularly desired ...

Topology Optimization of Thermal Heat Sinks

J. H. K. Haertel [1], K. Engelbrecht [1], B. S. Lazarov [2], O. Sigmund [2],
[1] Technical University of Denmark, Roskilde, Denmark
[2] Technical University of Denmark, Kgs. Lynby, Denmark

1. Introduction The topology optimization method is becoming increasingly popular as a design tool for multiphysics systems [1,2]. Topology optimization of fluid-thermal systems has been presented for example in [3] for forced convective heat transfer and in [4] for natural convection problems. In this work, topology optimization including density filtering and projection is applied to ...

Lennard-Jones Potential Determination via the Time-Dependent Schrödinger Equation

D. Nguemalieu. Kouetcha [1], H. Ramezani [1][2], N. Cohaut [1],
[1] Université d’ Orléans, ICMN, UMR CNRS, Orléans France
[2] Ecole Polytechnique de l' Université d’ Orléans, Orléans, France

The accurate atomic potential determination is an essential task in the molecular simulations, e.g. Grand Canonical Monte Carlo (GCMC). The ab initio simulations using the quantum mechanics would of great interest in the computational physical chemistry. The numerical simulation of the adsorption phenomenon requires knowing the interactions parameters between the atoms that make up the systems ...

Modeling and Simulation of Drug Release Through Polymer Hydrogels

V. Runkana[1], S. Maheshwari[1], S. Cherlo[1], RSR Thavva[1]
[1]Tata Research Development and Design Centre, Tata Consultancy Services Ltd., Pune, Maharashtra, India

Polymer hydrogels are commonly used as carriers or vehicles for the controlled release of drugs, primarily because of their bio-compatibility and because rates of drug release can be controlled by manipulating polymer properties like molecular weight, cross linking ratio, etc. Drugs can be released for prolonged periods of time through polymer hydrogels [1, 2]. Sustained drug release may ...

Prediction of Noise Generated by Electromagnetic Forces in Induction Motors - new

M. K. Nguyen[1], R. Haettel[2], A. Daneryd[2]
[1]KTH, Stockholm, Sweden
[2]ABB Corporate Research,Västerås, Sweden

Induction motors, as any other industrial products, have to comply with various requirements on noise levels. Therefore, it is essential to use an appropriate prediction tool to verify and optimize the design of an induction motor with respect to the acoustic performances. The paper will focus on the prediction of the magnetic noise generated and radiated by a specific motor. The challenge is ...

Multiphysics CAE of Shock Absorber

A. Prasad [1], R. C. Thiagarajan [1],
[1] ATOA Scientific Technologies, Bengaluru, Karnataka, India

A Shock absorber is a mechanical device engineered to absorb high impact load and provide comfort while riding on a rough roads. Suspension springs are the key components of a shock absorber to resist critical impact loads and provide ride comfort. The cylindrical spring designs comes with several limitation which can not operate under heavy impact loads. This experiment deals with the ...