Technical Papers and Presentations

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.

Ultrasonic Beam Steering in Isotropic Media

S. Jeyaraman, B. Ganesan, and M. Kumar
GE Global Research, Bangalore

In this paper, a numerical model for time-domain ultrasound plane wave propagation for a desired angle is presented. The propagating angle is a function of the distance and the time-delay between the individual elements, and the propagating sound speed. In this model, the control parameter 'time' is used for steering the beam at the desired angle. We present an application of the proposed ...

Analysis and Topology Optimization of Heat Sinks with a Phase-Change Material using a COMSOL Multiphysics Platform

V.S.S. Srinivas, and G.K. Ananthasuresh
Indian Institute of Science, Bangalore

This paper presents the analysis and optimal design of the transient heat conduction problem involving phase change for a passive electronic cooling device. Both the analysis and topology optimization are carried out in the integrated environment of COMSOL Multiphysics using the enthalpy method to model phase change. The topology optimization of a heat-sink made of aluminum and paraffin ...

Mapping Local Cavitation Events in High Intensity Ultrasound Fields

V. Raman [1], A. Abbas[2], and S.C. Joshi[2]
[1] Indian Institute of Technology, Madras
[2] Nanyang Technological University, Singapore

The linear acoustic pressure field is obtained by solving the homogenous Helmholtz equation using COMSOL Multiphysics. The pressure field is used to calculate the collapse pressure of the transient cavitation bubbles by using the cavity cluster approach. The regions where the local pressure exceeds the Blake threshold are potential regions of transient cavitation events. The ultrasound ...

Bubble Growth Simulation in a Liquid Supersaturated by Gas

V.K. Sinha, S. Ravi, and C. Thiagarajan
GE Global Research, Bangalore

This paper investigates a critical growth aspect of supersaturated polymer porous materials, where the multiphysics has been addressed through using COMSOL Multiphysics. The trend predicted by the models agree with observed experimental extrusion results.

Simulation of a One-Port SAW Resonator using COMSOL Multiphysics

R. Krishnan, H.B. Nemade, and R. Paily
Indian Institute of Technology, Guwahati

In this paper, we discuss simulation of one-port Surface Acoustic Wave (SAW) resonators using COMSOL Multiphysics. Resonator action can be achieved in one of the two ways; a single Inter-digital Transducer (IDT) having several fingers over a piezoelectric substrate or a short IDT with reflecting gratings at the ends of the IDT. We have modeled a Rayleigh wave type SAW device choosing YZ ...

Simulation for Thermomechanical Behavior of Shape Memory Alloys (SMA) using COMSOL Multiphysics

S. Shrivastava
Indian Institute of Technology, Bombay

The Finite Element Method (FEM) is applied for numerical analysis of a Shape Memory Alloy (SMA) beam fixed at both the ends, using a thermodyanamic constitutive model The wire is heated through resistive heating by providing controlled potential at the ends of the beam. Results show that the beam tends to return to its original position and the curvature of the beam is simulated.

Investigation of Fluid Structure Interaction of an Elastic Membrane in a Microchannel

S. Moondra, A. Upadhyay, and S.K. Mitra
Indian Institute of Technology, Bombay

Numerical simulation of flow through a two dimensional Micro-channel with an embedded elastic structure is studied in this paper. A parametric study for different geometries is conducted to study the effect of elasticity of the structure and viscosity of the fluid on the maximum bending moment, maximum shear stress developed in the structure, and the maximum displacement of the tip of the ...

Analysis of Lorentz and Saliency Forces in Rotating Machines

A.V. Kank, and S.V. Kulkarni
Indian Institute of Technology, Bombay

This paper first gives an overview of methods of force calculation. Two kinds of forces, the Saliency and Lorentz forces, play an important role in behavior of any electrical machine. It then compares results obtained by different methods using the COMSOL Electromagnetics Module. The results are also compared with analytical solutions.

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