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.

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 ...

Some Commonly Neglected Issues Which Affect DEP Applications

G. Zhang[1], V. Pandian[1], J. Brcka[2], J. Faguet[2], E. Lee[2]
[1]Clemson University, Clemson, SC, USA
[2]TEL U.S. Holdings, Inc., U.S. Technology Development Center, Austin, TX, USA

Dielectrophoresis (or DEP) has been exploited for various micro and nano fluidics applications like patterning, sorting and separation. However, there are several commonly neglected issues in quantifying DEP forces. Such negligence could potentially lead to wrong DEP force predictions and estimates, posing difficulties in correlating experimental observations with theories. Among the commonly ...

Advanced Modeling of a Lung-on-a-Chip Microdevice

M. J. Hancock [1], N. H. Elabbasi [1],
[1] Veryst Engineering, Needham, MA, USA

Organ-on-a-chip microdevices combine microfluidics, MEMS, and biotechnology techniques to mimic the multicellular architectures, tissue-tissue interfaces, physicochemical microenvironments, and vascular perfusion of the body.[1] Such devices are being developed to provide better levels of tissue and organ functionality compared with conventional cell culture systems, and have great potential to ...

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 ...

Fluid Flow Behavior in Steady and Transient Force Medical Injection Systems

E. Gutierrez-Miravete [1], T. Langley [2],
[1] Rensselaer Polytechnic Institute - Hartford, Hartford, CT, USA
[2] Rensselaer Polytechnic Institute, Troy, NY, USA

Syringes were first conceptualized in 1650, but were invented in 1853 by Dr. Alexander Wood. As of 2011, nearly 8 billion syringes are used each year in the United States for medical purposes (not including veterinary services). These syringes are used for diseases like diabetes, rheumatoid arthritis, multiple sclerosis, and HIV. As injected medication is becoming increasingly more common, ...