COMSOL Derived Universal Scaling Model For Low Reynolds Number Viscous Flow Through Microfabricated Pillars – Applications to Heat Pipe Technology
N. Srivastava, and C.D. Meinhart
Department of Mechanical Engineering, University of California Santa Barbara, Santa Barbara California, USA
Cooling of high-power density electronic devices remains a challenge. Microfluidic heat-pipes with the potential of achieving ultra-high thermal conductivities offer a low-cost technology for cooling electronics. To achieve high thermal conductivity, it is critical to maximize the rate of liquid transport inside the heat pipe. We propose a novel array of microfabricated pillars to maximize liquid ...
R. Umhack, M. Rainer, M. Tamerle, and G. Hillmer
Process-, Environmental- and Bio- technology, MCI - University of Applied Sciences, Innsbruck, Austria
A new type of radiator with a package of combs, to gain a larger area for heat exchange, instead of trapezoidal convector plates, is investigated. The main aim is to find the optimal comb diameter. To solve this problem, CFD (computational fluid dynamics) with COMSOL Multiphysics is used. A chart showing radiator power was produced, which includes radiator power for different temperatures and ...
EMD Millipore Corporation, Bedford, MA USA
Membrane-based tangential flow filtration (TFF) cassettes are used for the clarification, concentration and purification of fluid streams containing macromolecules of proteins. In TFF, the protein fluid is pumped tangentially along the surface of the membrane. The feed flow along the length of channel between two membranes causes a pressure drop from the feed to the retentate end of the channel. ...
O. Tonomura, M. Tsujimoto, M. Kano, and S. Hasebe
Kyoto University, Kyoto, Japan
Accelerating mass transfer is the key for obtaining higher product yield in an electrolytic microreactor (EMR). Through CFD simulation, the effectiveness of EMR having grooved electrode (EMR-GE) is shown in this work. In addition, a systematic design method is developed. Response surface method (RSM) is introduced into the CFD-based optimal design of EMR-GE. It is shown that the combination of ...
C. Block, B. Van Mele, and V. Janssens, P. Van Puyvelde, and G. Van Assche
Vrije Universiteit Brussel, Physical Chemistry and Polymer Science, Brussels, Belgium
Catholic University of Leuven, Lab of Applied Rheology and Polymer Technology, Heverlee, Belgium
COMSOL is used for optimization of the design of a novel analytical technique, RheoDSC, which combines a rheological and a calorimetric measurement on one sample. A rheological experiment is performed on a sample positioned on a DSC sensor in a DSC instrument. DSC is used to study transition enthalpies and heat capacity in isothermal and non-isothermal conditions. The working principle of a ...
S. Wolf, and J. Czerwinska
University of Bern
Thermal fluctuations of microparticles are an important way of transport in biological cells. While the fluid properties, such as viscosity, cannot always be directly measured, the random path of a microparticle can be observed under microscope. The relation between the diffusion and the fluid viscosity is analytically well described for spherical particles. Therefore, we have simulated and ...
K. M'rabet Bensalah, J. Czerwinska, D. Uehlinger, R. Kalicki
University of Bern, Faculty of Medicine, Bern, Switzerland
ARTORG Center for Biomedical Egineering Research, Artificial Kidney Research, Bern, Switzerland
University Hospital of Bern, Department of Nephrology and Hypertension, Bern, Switzerland
In silico research is gaining interest in the medical field. Simulating the renal circulation is a very challenging and exciting task due to the high morphological and functional complexity of this system. In numerous renal diseases the underlying pathomechanism as well as the primary and secondary damages, concern the vascular system. A better understanding of the local hemodynamics will ...
T. Reisner, H. Steeb, and J. Renner
Institute of Mechanics - Continuum Mechanics, Ruhr-University Bochum, Bochum, Germany
Institute of Geology, Mineralogy and Geophysics, Ruhr-University Bochum, Bochum, Germany
A new continuum-mechanical model for the study of sediment erosion, transport and deposition was developed using a three-phase mixture approach. It differs from existing two-phase models in that the sediment is modeled as two different phases, rigid sediment bed and mobile particles, instead of one phase. The model is currently implemented into Comsol Multiphysics using the Mixture Model and ...
D. Case, B. Taheri, and E. Richer
Southern Methodist University
A magnetorheological fluid consists of a suspension of microscopic magnetizable particles in a non-magnetic carrier medium. When a magnetic field is produced in the same space, the microscopic particles suspended in the fluid become oriented and form chains along the magnetic flux lines, changing the fluid’s rheology. This project uses COMSOL Multiphysics to examine the magnetic flux lines ...