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.

Simulation of Pumping Induced Groundwater Flow in Unconfined Aquifer Using Arbitrary Lagrangian-Eulerian Method

Y. Jin[1], E. Holzbecher[1], S. Ebneth[2]
[1]Department of Applied Geology, Georg-August-University, Göttingen, Germany
[2]Hoelscher Dewatering, Haren, Germany

A novel numerical method characterizing groundwater flow in unconfined aquifer is demonstrated. In contrast to the conventional method (Dupuit approach considering horizontal flow only), hydraulic head is simulated in horizontal and vertical directions. The new approach is introduced via developing a 2-D-axisymmetric model representing the vertical cross section of the aquifer. The model solves ...

Surface to Surface Radiation Benchmarks

J. v. Schijndel [1], R. v. Eck [1], M. Klep [1],
[1] Eindhoven University of Technology, Eindhoven, Netherlands

The paper presents a student guide on how to implement surface to surface radiation within COMSOL Multiphysics® software for case studies found within the built environment. We included four benchmarks: (1) Radiation in a triangular cavity with infinite length; (2) Radiation between two infinitely long rectangular plates; (3) Radiation in a three dimensional rectangular enclosure; (4) Radiation ...

Use of COMSOL as an Educational Tool Through its Application to Ground Water Pollution

A. Modaressi-Farahmand-Razavi[1]
[1]MSS-Mat Laboratory, CNRS, Ecole Centrale Paris, Châtenay Malabry, France

Ensuring the quality of underground water and controlling its quantity is of major concern for the population. Therefore, this subject attracts many students from different specialties at different levels of their curriculum. In fact, the pedagogic objectives of the course may be different according to the level or/and interest of the students and COMSOL is used due to its versatility. In this ...

COMSOL Multiphysics Models for Teaching Chemical Engineering Fundamentals: Absorption Column Models and Illustration of the Two-Film Theory of Mass Transfer

W. Clark
Chemical Engineering Department, Worcester Polytechnic Institute, Worcester, MA, USA

COMSOL® models have been developed for teaching gas absorption fundamentals. Model results are compared to environmentally significant experimental results for removing CO2 and SO2 from air using water as solvent. For concentrated gas mixtures, the models are shown to be equivalent to but easier to use than the traditional graphical integration method and to a solution method developed with ...

Stress and Fatigue Analysis of Subsea Umbilical and Cable Systems

M.S. Yeoman[1], V. Sivasailam[1], T. Poole[3], S. Ingham[3]
[1]Continuum Blue, Tredomen, Ystrad Mynach, United Kingdom
[3]JDR Cable Systems, Littleport, Cambridgeshire, United Kingdom

With the ever changing energy requirements & demand for better communication links across the planet, subsea umbilical & cable requirements are becoming more stringent. Where longer service life at a lower cost is now expected from manufacturers. In addition to this, with the need to exploit more sustainable energy sources from offshore wind & wave, where extreme weather conditions are ...

基频最大的经纬仪基座的拓扑优化

高阁 [1][2], 刘震宇 [1],
[1] 中国科学院长春光学精密机械与物理研究所,长春,吉林,中国
[2] 中国科学院大学,北京,中国

In order to satisfy the requirements of modern range measuring technology, photoelectric theodolites gradually develop towards lightweight and minitype design. As a consequence, the mobile theodolite is becoming a hot spot recently. New requirements are raised for the theodolite base (Figure1), which is an essential part of photoelectric theodolites. Namely, the eigenfrequencies should be high ...

Definition of Optimization Problem for Electromagnetic Linear Actuator

P. Piskur[1], W. Tarnowski[1], and K. Just[1]

[1]Koszalin Technical University, Koszalin, Poland

In this paper a poly-optimization of the design of the electromechanical actuator is presented. The shape of the actuator is defined by the decision variables. The number of decision variables under consideration is up to ten but in the next step while the multi-coils system will be analyzed the number of decision variables will increase up to hundred, so the genetic algorithm has been used. The ...

The Use of COMSOL in Teaching Heat and Moisture Transport Modeling in Building Constructions

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

This paper presents the use of the multiphysics package COMSOL for teaching heat and moisture transport modeling in the research area of building physics. It includes a description on how COMSOL works and six exercises with 2D, 3D, steady state and transient models. It is concluded that COMSOL is a very useful tool for this kind of engineering education. Especially, the abstraction level of ...

Inverse Problem and a New Device to Estimate Thermal Conductivity of Composite Phase Change Material

M. Karkri [1], A. Nachaoui [2]
[1] Université Paris-Est, CERTES, Créteil Cedex, France
[2] Département de Mathématiques 2, Nantes Cedex, France

A new experimental device has been developed in order to characterize the phase change material (PCM) thermal properties (thermal conductivity k, sensible and latent heat thermal energy storage, cp and Lf) in the solid phase, during the solid-liquid transition and in the liquid phase. It allows to measure cylindrical samples of maximum 60 mm radius and 10 mm thick. A typical measurement consists ...

Estimation of Boundary Properties Using Stochastic Differential Equations and COMSOL

A. Atalla[1], and A. Jeremic[1]
[1]McMaster University, Hamilton, Ontario, Canada

The inverse diffusion problems deal with the estimation of many crucial parameters such as the diffusion coefficient, source properties, and boundary conditions. Such algorithms are widely applied in many design problems in different physical, chemical, and biological fields. Recently, the estimation of the boundary properties, of the diffusion process, have attracted researchers. We first ...