Department of Mathematics, Monmouth University, West Long Branch, NJ, USA
Atherosclerotic lesions preferentially develop in certain regions like bifurcations, branches, and bends [1, 2]. A possible explanation for such a preferential localization of atherosclerosis is that the geometry of the vessel influences the blood flow pattern. It suggests that the arterial geometry plays an important role in determining the localized blood flow information. Thus hemodynamic ...
R. Penjweini, M. M. Kim, T. C. Zhu
Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, USA
Introduction: Singlet oxygen (¹O₂) has a critical role in the cell-killing mechanism of photodynamic therapy (PDT). Therefore, in this study, the distance-dependent reacted ¹O₂ is numerically calculated using finite-element method (FEM). Herein, we use a model [Ref. 1] that has been previously developed to incorporate the diffusion equation for the light transport in tissue and the macroscopic ...
U. Topaloglu, Y. Yan, P. Novak, P. Spring, J. Suen, and G. Shafirstein
 Department of Information Technology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
Department of Otolaryngology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
Thermal ablation in the head and neck requires accurate thermal dose delivery to target tissue while protecting the structure and function of nearby tissue and organs. In this study, we present a method that allows importing Computed Tomography (CT) scans to COMSOL, in order to model accurately the expected pathological outcomes prior to thermal ablation treatment. Thermal ablation of a virtual ...
Energy Harvesting from Variation in Blood Pressure through Deformation of Arterial Wall using Electro-magneto-hydrodynamics
A. Pfenniger, V.M. Koch, A. Stahel, and R. Vogel
ARTORG Cardiovascular Engineering, University of Bern, Bern, Switzerland
Bern University of Applied Sciences, Engineering and Information Technology, Biel, Switzerland
The present project aims at modelling a generator that harvests energy from the variation in blood pressure by exploiting the motion of the arterial wall between the diastolic and systolic phase of the cardiac cycle. The concept is to use a highly electrically conductive fluid, which is driven by the motion of the arterial wall within a separate compartment outside the artery. A constant ...
An Elastic and Hyperelastic Material Model of Joint Cartilage - Calculation of the Pressure Dependent Material Stress in Joint Cartilage
T. Reuter, and M. Hoffmann
Research Centre of Medical Technology and Biotechnology
Bad Langensalza, Germany
In this paper we introduce a elastic and hyperelastic model to describe the pressure dependent material stress in joint cartilage. We used the pressure dependent E-modulus E = f(s) to calculate the material stress. E = f(s) is a degree 4 polynomial . The indentor was pressed 0.4 mm into the tissue. The results show that the maximal stress at the contact zone between indentor and cartilage ...
Luleå University of Technology, Luleå, Sweden
This paper presents a numerical study of the deposition of submicron charged spherical particles caused by convection, Brownian and turbulent diffusion in a pipe with a smooth wall and with a cartilaginous ring wall structure (see figure). The model is supposed to describe deposition of charged particles in generation 0 (trachea) of the human lung.The problem is defined by solving the fluid flow ...
A Multiscale-Multiphysics Model for Axon Pathfinding Simulation, the Example of the Olfactory System
G. Naldi, G. Aletti, P. Causin
Dipartimento di Matematica ‘F. Enriques’, Università degli Studi di Milano, Milano, Italy
In the developing embryo, neurons form connections by projecting axons to appropriate target areas. The projection process includes neurite elongation, resulting from the assembly of new cytoskeletal material at the free end of the axon, a complex cascade of steering decisions, driven by biomechanical properties of the surrounding environment and by signals in it. In this work we focus on the ...
O. Henao, V. Gómez, I. De la Pava, J. Sánchez
Grupo Fisiología Celular y Aplicada, Universidad Tecnológica de Pereira, Pereira, Risaralda, Colombia
Electroporation is an increase of the cell membrane permeability due to the formation of aqueous pores in it when the cell is under the influence of an intense electric field . The formation of such pores in the membrane can be used to enhance the uptake of chemotherapeutic drugs into the cell in a cancer treatment known as electrochemotherapy . In some cases the direct experimental ...
O. Yassine, M. Kavaldzhiev, J. Kosel, Q. Li, A. Alfadhel, A. Zaher
Electrical Engineering Division, CEMSE Group, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
Thermally responsive microgel Poly (N-isopropylacrylamide), particles are embedded with iron oxide nanobeads creating magneto-thermally responsive microparticles (MTMs). The magnetic losses in the nanobeads activate the PNIPAM by heating it up to its lower critical solution temperature (LCST), which is approximately 32°C. The COMSOL Multiphysics® software with Heat Transfer Module is used to ...
T. O. Bassani , T. Bassani , A. Andriguetto , F. Schneider ,
 Instituto Latino Americano de Pesquisa e Ensino Odontológico - ILAPEO, Curitiba, PR, Brasil
 Universidade Tecnológica Federal do Paraná – UTFPR, Curitiba, PR, Brasil
O presente estudo visou a avaliação, por meio do método dos elementos finitos, das tensões geradas em um arco ortodôntico chamado de Arco de Retração Dupla Chave, também conhecido como DKL. Para isso foram modeladas as geometrias do arco DKL, dos bráquets e das coroas dentais, no software COMSOL Multiphysics®. O modelo criado tem como objetivo a substituição dos métodos tradicionais de ...