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.

Energy Harvesting from Variation in Blood Pressure through Deformation of Arterial Wall using Electro-magneto-hydrodynamics

A. Pfenniger[1], V.M. Koch[2], A. Stahel[2], and R. Vogel[1]
[1]ARTORG Cardiovascular Engineering, University of Bern, Bern, Switzerland
[2]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 ...

Modeling Arterial Drug Transport From Drug-eluting Stents: Effect of Blood Flow on the Concentration Distribution Close to the Endothelial Surface

F. Bozsak, J.-M. Chomaz, and A. I. Barakat
LadHyX, Ecole Polytechnique
Palaiseau, France

Drug-eluting stents (DES) are commonly used for treating coronary atherosclerosis. Despite the broad effectiveness of DES, ~5% of treated patients experience complications including in-stent restenosis and late-stent thrombosis. Furthermore, drugs used in DES not only inhibit proliferation of smooth muscle cells but also affect re-endothelialization. We have developed a computational model ...

Performance of a Miniaturized Hydrocyclone for the Isolation of Schistosoma Mansoni Eggs - new

C. Soares[1], N. Padoin[1], F. Montalvo[2], D. Cobra[2]
[1]Federal University of Santa Catarina, Florianópolis, SC, Brazil
[2]CERTI Foundation, Florianópolis, SC, Brazil

Schistosoma mansoni parasites affect million people worldwide. The intensity of the infection can be evaluated by the number of eggs present in the stool of an infected individual. The application of the traditional methods has been regarded as impractical in developing areas and there is a continuous search for new techniques. In face of this scenario, a new method of diagnosis was explored in ...

血管对肿瘤的光热疗法的影响

吴淑莲 [1], 李晖 [2], 李志芳 [2],
[1] 福建师范大学,福州,中国
[2] 福建师范大学,福州,中国

引言:激光诱导间质肿瘤热疗法是一种可使生物组织局部地方凝结坏死的肿瘤疾病治疗方法,目前已经用于肝、脑等各部位的肿瘤治疗[1-2]。为了更好地进行肿瘤疾病的治疗,需要实时地对组织的温度和热损伤进行监控,而检测技术很难实现对肿瘤治疗过程的实时监测,故数值计算成为研究光热疗法的有力工具[2-6]。本模型将生物组织光传输的物理场与热传输的物理场相耦合,考虑组织光热参数随温度变化的情况,研究了肿瘤周围含有大动脉的情况时组织的温度分布随时间的变化情况,研究结果对指导临床医学肿瘤治疗有重要意义。 COMSOL Multiphysics® 的软件使用: 几何模型:如图1所示,圆柱代表光源,圆形区域代表肝脏肿瘤,弯曲圆柱代表大血管,大正方体代表肝脏。 PDE 接口和生物传热接口,选择生物组织的热损伤。 结果: 如图2,图3所示,在加热过程中,开始时血管对温度分布几乎无影响,但是随着加热时间变长 ...

On A Particle Tracking Technique To Predict Disinfection In Drinking Water Treatment Systems

B.A. Wols[1,2], J.A.M.H. Hofman[1,2], W.S.J. Uijttewaal[2], and J.C. van Dijk[2]
[1]KWR Watercycle Research Institute, Nieuwegein, The Netherlands
[2]Delft University of Technology, Niewegein, The Netherlands

Disinfection of drinking water is required to prevent the outbreak of water-borne diseases. Different treatment steps are available to disinfect the water, such as chlorination, ozonation or UV irradiation. The hydrodynamics of these processes play an important role in their performance. COMSOL Multiphysics was used to simulate the water flow in disinfection installations. Moreover, a particle ...

Modeling Enzymatic Pathways in Giant Lipid Vesicles

F. Mavelli [1], E. Altamura [1], P. Stano [2],
[1] University “Aldo Moro”, Chemistry Department, Bari, Italy
[2] Science Department, Roma Tre University, Rome, Italy

Giant vesicles (GVs) are artificial chemical systems largely used as cell models, since they are micrometer-sized closed compartments bounded by a semi-permeable membrane, which in turn is composed by self-assembling amphiphiles. By opportunely engineering the lipid membrane and by entrapping cascade-reaction enzymes inside GVs, it is possible to design micro-sized reactors where metabolic ...

Frequency and Electrode Separation Recommendations for EDA Measurements

S. Sridhar [1], T. J. Akl [1],
[1] Analog Devices Inc., Wilmington, MA, USA

Electrodermal Activity (EDA) is a measure of changes in the conductivity of the skin. It has have been found to be indicative of the individual’s autonomic nervous activity which is correlated to their stress and emotional state. These conductivity changes are tracked by injecting a small electric current directly into the skin and measuring the induced voltage drop over time. With increase in ...

Investigating the Loading Behaviour of Intact and Meniscectomy Knee Joints and the Impact on Surgical Decisions

M. S. Yeoman [1],
[1] Continuum Blue Ltd., Cardiff, United Kingdom

Knee joints are often subject to high loads, which can lead to injury, malalignment, and the progression of osteoarthritis in patients. To better understand the behavior, and the effect of meniscal damage and different meniscectomy repair approaches, a 3D structural mechanics model of a patient specific knee was developed in COMSOL Multiphysics®. The model made use of the Structural Mechanics ...

A Novel Plug n Play MEMS-Based DNA Microarray

K. Jindal [1], V. Grover [1], B. Nayak [1],
[1] Birla Institute of Technology and Science - Pilani, Ghaziabad, Uttar Pradesh, India

Microarrays are extensively used in modern biology as tools of multiplexed, high throughput analysis to study thousands of genes and their expression inside cells at once [1]. The basic principle of a microarray is quantitative detection of fluorophore tagged DNA. Use of this method results in microarray experiments being expensive and complex due to fragile and costly fluorophores and ...

Influence of Non-Newtonian Blood Viscosity on Wall Pressure in Right Coronary Arteries with Serial Stenoses

B. Liu [1]
[1] Monmouth University, West Long Branch, NJ, USA

Three dimensional mathematical models are developed to simulate the blood flows in patient specific right coronary arteries with two stenoses. Simulations are carried out with various flow parameters under physiological conditions. Both Newtonian and non-Newtonian blood viscosity models are applied in the simulations to examine the influence of non-Newtonian viscosity of blood on the wall ...