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Simulating Organogenesis in COMSOL Multiphysics®: Image-Based Modeling - new

D. Iber[1,3], Z. Karimaddini[1,3], E. Unal[1,2], D. Menshykau[1,3]
[1]D-BSSE, ETH Zurich, Basel, Switzerland
[2]DBM University of Basel, Basel, Switzerland
[3]Swiss Institute of Bioinformatics (SIB), Lausanne, Switzerland

Mathematical Modeling has a long history in developmental biology. Advances in experimental techniques and computational algorithms now permit the development of increasingly more realistic models of organogenesis. In particular, 3D geometries of developing organs have recently become available. In this paper, we show how to use image-based data for simulations of organogenesis in the COMSOL ...

The Use of COMSOL Multiphysics® Software to Explore Flooding and Rising Dampness Problems Related to Cultural Heritage

H.L. Schellen [1], A.W.M. van Schijndel [1],
[1] Eindhoven University of Technology, Eindhoven, Netherlands

In The Netherlands rising dampness problems due to flooding of rivers and high groundwater levels form an essential treat for monumental buildings and heritage. A number of cases exists where rising dampness problems lead to the deterioration of wall finishes but also of valuable wall paintings in churches and castles. To explore the problem and to look for solutions like drying regimes, ...

Finite Element Method as an aid to machine design: A Computational Tool

C. Gupta[1], S. Marwaha[1], and M. Manna[1]
[1] Department of Electrical & Instrumentation Engineering, SLIET , Longowal (Deemed University), Punjab, India

The paper provides an overview of the state of art in computational electromagnetic. There are three major ar eas like Design, optimization and material selection for the electric machines. The computational tool based on finite elements is very useful and powerful field simulation techniques available to assist in the design and performance prediction of electric machines. But the complexity ...

An Analysis of Spin-Diffusion Dominated Ferrofluid Spin-Up Flows in Uniform Rotating Magnetic Fields

S. Khushrushahi[1], A. Guerrero[2], C. Rinaldi[3], and M. Zahn[1]
[1]Massachusetts Institute of Technology, Cambridge, MA
[2]Univeridad Industrial de Santander, Bucaramanga, Colombia
[3]University of Puerto Rico, Mayaguez, Mayaguez, PR

This work analyzes the spin-diffusion dominated explanation for spin-up bulk flows in ferrofluid filled cylinders, with no free surface, subjected to a uniform rotating magnetic field. COMSOL results are compared to experimental results and analytical results. Simulating ferrofluid spin-up flows have many subtleties, especially when using a single domain region to model the ferrofluid ...

Benchmarking Tailored Formulations of Multiphase Flow in Porous Media

Á. Sainz [1,2], A. Nardi [1], E. Abarca [1], F. Grandía [1]
[1] Amphos 21 Consulting S.L., Barcelona, Spain
[2] Université Toulouse III - Paul Sabatier, Toulouse, France

Nowadays, gas and nuclear waste storage, shale gas and EOR exploitation rise the need to understand and predict the fate of multiphase flows in the underground. Various formulations for multiphase flow arise from different linear combinations of governing equations and choice of associated unknowns. Each formulation has its own benefits and drawbacks; and the optimal may vary depending on the ...

Asymmetry Induced Terminal Voltage Improvement in Mg2Si-based Thermoelectric Unicouple

P. Priyadarshi [1], J. Bahl [1], B. Muralidharan [1]
[1] Indian Institute of Technology Bombay, Mumbai, India

Thermoelectric power generation has been envisioned as a clean energy alternative to conventional thermal to electric power generation for decades due to its noiseless and low-cost operation. However, a typical thermoelectric generator suffers from low device efficiency, so it has been a constant endeavor for thermoelectric researchers’ community to consider alternate thermoelectric materials ...

Oxidation of Titanium Particles during Cold Gas Dynamic Spraying

A. Malachowska[1], L. Pawlowski [1], A. Ambroziak [2], M. Winnicki [2], P. Sokolowski[2]
[1]University of Limoges, Limoges, France
[2]Wroclaw University of Technology, Wroclaw, Poland

This paper studies oxide forming on titanium, during cold gas dynamic spraying with air. This is a quite new spraying method, which can be used to spray material having high affinity for oxygen. The model allows for the diffusion of oxygen through the oxide layer, reaction on the oxide-titanium interface and expansion of oxide, due to difference in molar density. It was implemented in COMSOL ...

3D Multiphysics Modeling of Bulk High-Temperature Superconductors for Use as Trapped Field Magnets - new

M. Ainslie[1], J. Zou[1], D. Hu[1], D. Cardwell[1]
[1]Department of Engineering, University of Cambridge, Cambridge, UK

The authors are currently investigating the use of bulk high temperature superconductors as trapped field magnets (TFMs) in order to increase the electrical and magnetic loading of an axial gap, trapped flux-type superconducting electric machine. In electric machines, the use of superconducting materials can lead to increases in efficiency, as well as power density, which results in reductions ...

Modeling of Wettability Alteration during Spontaneous Imbibition of Mutually Soluble Solvents in Mixed Wet Fractured Reservoirs - new

M. Chahardowli[1], H. Bruining[1]
[1]Delft University of Technology, Delft, The Netherlands

Mutually-soluble solvents can enhance oil recovery both in completely and partially water wet fractured reservoirs. When a strongly or partially water-wet matrix is surrounded by an immiscible wetting phase in the fracture, spontaneous imbibition is the most important production mechanism. Initially, the solvent moves with the imbibing brine into the core. However, upon contact with oil, as the ...

Modeling of Space-Charge Effects in 3D Thermionic Devices

P. Zilio [1], W. Raja [2], A. Alabastri [3], R. Proietti Zaccaria [2]
[1] Istituto Italiano di Tecnologia, Italy
[2] Istituto Italiano di Tecnologia, Italy
[3] Rice University, USA

The formation of space charge clouds is a well known problem that affects thermionic emitters in regimes of high current emission. Although some analytical models have been presented, suitable for 1D geometries, the modeling of the problem in complex 3D structures remains a challenge due to the mutual coupling between electron trajectories and field they produce. Here we propose a model able to ...