MRI offers physiological and diagnostic advantages over other modalities (CT, PET) and, if examining a paediatric patient, the lack of ionizing radiation is especially important. However, the process for infants is limited by the radio-frequency (RF) coils currently available which are optimized for adult anatomy. Simulation is used to confirm the safety of the coil and design performance. The ...

The microstrip line is widely used as the planar transmission line in microwave integrated circuits and high speed interconnecting buses. In this paper, we use COMSOL multiphysics to study multiconductor microstrip systems on microwave integrated circuits. We specifically illustrate the modeling of open four and five conductors systems. We successfully demonstrated the calculation of the capaci...

In this work, the fluid flow over a 2D backward-facing step is analyzed in order to provide a case study for the use of different models for the blood dynamic viscosity in COMSOL Multiphysics. Three non-Newtonian models, as well as the Newtonian model are used to study the shear stresses and the reattachment length as a function of the fluid speed. The nonNewtonian models used in this study are...

n this essay, we present design and simulation of a Leakage detection and alocation of oil pipelines system using sensing the temperature distribution of optical fiber by COMSOL Multiphysics software. In this system, telecommunication single-mode optical fiber, 200 m typical length is used, in 1.55 μm electromagnetic wave. The proposed system, uses of Brillouin frequency shift occurred on fiber...

Transdermal drug delivery (TDD) is used to deliver drugs through the skin as an alternative to oral, intravascular, and subcutaneous routes. While there are many advantages to TDD, skin is a very effective barrier and provides resistance to drug delivery. To improve drug delivery through the skin, permeation enhancers are used. We developed an axisymmetric COMSOL Multiphysics model of drug diff...

The linear Induction motor, first conceived in the 19 century, could present a viable solution to the problem of quick and efficient transportation. However the performance of Single Sided Linear Induction Motor (SLIM) is severely degraded by ‘end effects’ and ‘transverse edge effects’. The present work is an attempt to investigate the magnetic flux distribution within the air gap and other reg...

This paper presents the design analysis of five vertical shielded microstrip lines. The vertical microstrip transition solves the problem of discontinuity between two microstrip lines in different layers of microwave circuit. The main objective of this paper is to compute the capacitance and other relevant parameters like potential distributions of five shielded vertical microstrip line by usin...

The self-heating process in a laboratory scale experiment has been modelled using the Comsol Multiphysics software. In the simulations the gas flow and air movement in the volume and heat diffusion in the bulk were taken into account however only one reaction in the pellets bulk is considered. The input data is found from measurements of the reaction chemistry and the heat transfer properties. ...

In the paper distributed parameter system models in the form of lumpedinput/distributed-output systems are introduced and modeling of temperature fields of the die in the benchmark casting plant is presented. Temperature fields were modeled and studied using a finite element method based software package COMSOL Multiphysics and numerical models in the form of a lumped-input/ distributed-output ...

The performance of two commercial simulation codes, Ansys Fluent and Comsol Multiphysics, is thoroughly examined for a recently established two-phase flow benchmark test case. In addition, the commercial codes are directly compared with the newly developed academic code, FeatFlow TP2D. The results from this study show that the commercial codes fail to converge and produce accurate results, and ...