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.

Fluid Dynamics of Blood Flow during Reperfusion and Post-conditioning

T. Merrill[1], A. La Barck[1], and J. Docimo[2]
[1]Rowan University, Glassboro, New Jersey, USA
[2]FocalCool, LLC, Mullica Hill, New Jersey, USA

Reperfusion injury is caused by the rapid restoration of blood flow to oxygen-starved tissue. Animal studies show that intermittent periods of occlusion (also called post-conditioning) during reperfusion can limit tissue damage to vital organs such as the heart and brain. These studies suggest that the protective effects of post-conditioning relate to the dynamics of blood flow. COMSOL is being ...

Transport of Vocs through Bioflim in Biotrickling Filters

Balasubramanian P[1]
[1]Indian Institute of Technology Madras, Chennai, Tamil Nadu, India

Realising the interlinkage of nature and engineering are of paramount essential while comprehending the basics of system’s performances. Application of biotechniques in air pollution control is one such emerging scientific area, where the understandings of these complex systems demand more utilisation of computing softwares. Recently, biofiltration is a versatile biological air pollution control ...

3-D Finite Element Modeling of Brain Edema: Initial Studies on Intracranial Pressure Using COMSOL Multiphysics®

X.G. Li[1], H. von Holst[1][2], J. Ho[1], and S. Kleiven[1]

[1]Division of Neuronic Engineering, KTH, Stockholm, Sweden
[2]Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden

Brain edema is one of the most common consequences of serious traumatic brain injuries which is usually accompanied with increased Intracranial Pressure (ICP) due to water content increment. A three dimensional finite element model of brain edema is used to study intracranial pressure in this paper. Three different boundary conditions at the end of Cerebral Spinal Fluid (CSF) were used to ...

Numerical Simulations Demonstrate Safe Vitrification and Warming of Embryos Using the Rapid-i™ Device

B.O.J. Johansson[1][2], Y.A. Tarakanov[1], H.J. Lehmann[2], and S.P. Apell[1]

[1]Department of Applied Physics, Chalmers University of Technology, Gothenburg, Sweden
[2]Vitrolife Sweden AB, Västra Frölunda, Sweden

During cryopreservation of human embryos, ice crystal formation in the embryos or in surrounding media may cause cryodamage to them and can be lethal. A strategy to avoid this is the vitrification procedure when the embryo and the surrounding medium undergo the transition to glassy state rather than a crystalline one during cooling. Similarly, recrystallization in the embryo or the medium must ...

Virtual Thermal Ablation in the Head and Neck using COMSOL Multiphysics

U. Topaloglu[1], Y. Yan[2], P. Novak[2], P. Spring[3], J. Suen[3], and G. Shafirstein[3]
[1] Department of Information Technology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
[2]Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
[3]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 ...

Dynamic Simulation of Bone Morphogenetic Protein Patterning in a 3D Finite-Element Model of the Danio Rerio Embryo

D. Umulis, and S. Lee
Purdue University
West Lafayette, IN

Zebrafish development of the dorsoventral axis relies on the spatiotemporal distribution of Bone Morphogenetic Protein (BMP) signaling, which is regulated by numerous secreted molecules such as Tolloid, Sizzled, and Chordin. The rich dorsal/ventral patterning network must achieve both spatial precision in the patterning of downstream targets and confernspatial precision at distinct time points ...

Modeling Phytoremediation by Mangroves

O. Richter[1], H. Anh Nguyen[1], V. Phuoc Nguyen[2]
[1]Institute of Geoecology, University of Technology Braunschweig, Germany
[2]Institute for Environment & Resources, HCM-City, Vietnam

Metal contaminants and organic pollutants are affecting aquatic environments in urban and industrial zones. Mangrove trees are capable of absorbing metal ions and organic pollutants. To estimate the remediation potential, a two dimensional model of water and substance flow in the soil plant system based on porous media equations was set up. We show that multiphysics approaches also apply to ...

A Model of Noninvasive Radiofrequency Tissue Heating

L. Rems[1], D. Miklavcic[1]
[1]University of Ljubljana, Faculty of Electrical Engineering, Ljubljana, Slovenia

Noninvasive radiofrequency (RF) tissue heating is frequently used for skin tightening and facial wrinkle reduction as alternative to invasive surgical procedures. However, to ensure a safe and efficient therapy, the temperature of the skin and the subcutaneous tissue must be controlled in order to prevent tissue damage. We used numerical modeling to investigate the dynamics of the temperature ...

Fresh Produce Safety During Hydrocooling: An Engineering Model - new

A. Warning[1], A. K. Datta[1]
[1]Department of Biological & Environmental Engineering, Cornell University, Ithaca, NY, USA

Hydrocooling is the process by which warm produce is chilled with water. The chilling of warm produce generates a negative pressure differential between the produce (warm) and (cold) water due to the condensation of water vapor inside the produce which forms a vacuum and can pull in contaminated water through an opening. A porous media based model of water infiltration was developed using a ...

On the Influence of Cancellous Bone Structure upon the Electric Field Distribution of Electrostimulative Implants - new

U. Zimmermann[1], R.Bader[2], U. van Rienen[1]
[1]Institute of General Electrical Engineering, University of Rostock, Rostock, Germany
[2]Department of Orthopaedics, University Medicine Rostock, Rostock, Germany

Since the 1980s, the accelerating effect of electromagnetic fields on bone regeneration is used to treat complicated fractures and bone diseases. At the University of Rostock, an electrostimulative hip revision system is developed, basing on the method of Kraus-Lechner. This method requires an electric fields between 5 and 70 V/m. The bone used for the simulations consisted of two homogenous ...