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.

Purcell Effect via Numerical Simulation - new

I. Zabkov [1], V. Klimov[1], A. Pavlov[1], D. Guzatov[2]
[1]All-Russia Research Institute of Automatics (VNIIA), Moscow, Russia
[2]Yanka Kupala State University of Grodno, Grodno, Belarus

As it is known nano-sized emitters (such as atoms, quantum dots and point defects in diamonds) interaction with nano-environment leads to drastic changes of their decay rate and therefore lifetime (Purcell effect). To calculate the influence in general one needs to solve equations of quantum electrodynamics. However in weak interaction limit these emitters can be considered as point electric ...

Two Step Study of Flow in an Industrial Pulp Screen, Solved with the COMSOL Multiphysics® Mixer Module - new

R. Wetind[1]
[1]Wetind Technology AB, Alnö, Sweden

An industrial pulp screen is investigated. The dilute pulp is pumped through a screen barrier. In order to avoid the fiber network to plug, it is necessary to 1) fluidize the shear thinning pulp 2) expose the barrier with plug releasing pressure pulses. This work involves a 2-step study. Step 1: The full screen flow is simulated using Mixer Module Frozen Rotor k-. Essential pressure field ...

Numerical Modelling of the Plasma Discharge During Electron Beam Welding (EBW) - new

D. Trushnikov[1], G. Mladenov[2]
[1]Perm National Research Polytechnic University, Perm, Russia
[2]Institute of Electronics of Bulgarian Academy of Sciences, Sofia, Bulgaria

This work describes a model for plasma formation in the keyhole and above the EBW zone. The parameters of the plasma are closely connected to the characteristics of the thermal action of the electron beam on the welded metal, which allows operational control and study of EBW. The ionization intensity of the vapour due to beam electrons and high-energy secondary and backscattered electrons is ...

Integrated Ion Optics Design - new

T. Majoros[1], B. Sebök[1]
[1]Department of Atomic Physics, Budapest University of Technology and Economics, Budapest, Hungary

Introduction: This study aims the optimization and sensitivity analysis of an existing device. A Secondary Ion Mass Spectrometer (SIMS) device is to be equipped with a high power laser in order to increase sputtering speed. The modified device must be capable of handling the increased level of contamination and energy spread of sample ions. Use of COMSOL Multiphysics® software: Transmission ...

Estimation of Tungsten Melt-Zone Size During Transient Heat Loads - new

Y. Patil[1], S. S. Khirwadkar[1], S. Belsare[1]
[1]Institute for Plasma Research, Gandhinagar, Ahmedabad, India

Electron beam has a wide range of applications in the material processing and joining techniques. Apart from that, it has also been utilized to simulate steady as well as transient fusion reactor relevant heat loads. Transient heat load events spontaneously occur in the fusion reactor. Several hundred megawatt of power is dumped upon the plasma facing material surfaces for a very short ...

On the Geometric Nonlinearity Effects of Polymeric Plates on Structural Performance - new

K. Vakkund[1], R. C. Thiagarajan[1]
[1]ATOA Scientific Technologies Pvt. Ltd., Bengaluru, Karnataka, India

Polymer sheets are widely used for glazing and roofing structural applications. The primary design requirements of these polymeric sheets are to resist uniformly distributed wind loading. Conventional building materials such as steel and glass plates are relative stiffer compared to polymeric sheets. The deflection of high stiff plates is about an order lower than polymeric plates. Polymeric ...

Optimization and Simulation of MEMS Based Thermal Sensor for Performance of Transformer Oil

V. Vijayalakshmi[1], K. C. Devi[1]
[1]PSG College of Technology, Coimbatore, Tamil Nadu, India

In this work, a bimetallic strip based thermal sensor was designed using MEMS module of COMSOL Multiphysics® software to monitor the temperature rise in insulating oil which was used as coolant in transformers. The bimetallic strip was designed with different shapes such as cylindrical, rectangle, square & conical and different compositions such as Al/Steel Alloy and Fe/Cu which can withstand ...

Design and Analysis of Micromixer for Enhancing its Mixing Performance

S. Ghadge[1], N. Misal[1], A. Shinde[1]
[1]SVERI's College Of Engineering, Pandharpur, Maharashtra, India

Mixing is an important process in a microfluidic system such as micro total analysis systems. In this paper, design and analysis of various micro-mixers for enhancing the mixing performance is presented. At first, the basic principles of mixing along with the mixing length and mixing time calculations are discussed. In general, macro-scale mixing is achieved with turbulence while mixing in micro ...

MEMS Based Tactile Sensors for Robotic Surgery

V. Nivethitha[1], S. P. Rakavi[1], K. C. Devi[1]
[1]PSG College Of Technology, Coimbatore, Tamil Nadu, India

In this work, a piezoelectric tactile sensor will be designed and simulated using COMSOL Multiphysics®. The sensor is designed in order to assess the pressure exerted on the human body while the robotic surgery is performed. The sensor consists of a rigid and compliant cylindrical element. A circular PDMS (Polydimethylsiloxane) film is sandwiched between the rigid cylinder and the base plate to ...

Optimization of Insulator-Based Dielectrophoretic Devices

M. A. Saucedo-Espinosa [1], M. Rauch [1], B. H. Lapizco-Encinas [2],
[1] Department of Microsystems Engineering, Rochester Institute of Technology, Rochester, NY, USA
[2] Department of Biomedical Engineering, Rochester Institute of Technology, Rochester, NY, USA

Insulator-based dielectrophoresis (iDEP) employs arrays of electrically insulator posts in a microfluidic device to create dielectrophoretic forces that affect particle movement (Figure 1). The trapping performance of iDEP devices involves a careful balance between electrokinetics (EK) and dielectrophoresis (DEP), where EK is the superposition of electroosmosis (EO) and electrophoresis (EP). The ...

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