The Effect of Cartilaginous Rings on Deposition by Convection, Brownian Diffusion and Electrostatics
Luleå University of Technology, Luleå, Sweden
This paper presents a numerical study of the deposition of spherical charged nanoparticles caused by convection and Brownian diffusion in a pipe with a cartilaginous ring structure. The model is supposed to describe deposition of charged particles in the upper generations of the tracheobronchial tree of the human lung. The upper airways are characterized by a certain wall structure called ...
M. Hackert-Oschätzchen, S. F. Jahn, and A. Schubert
Chemnitz University of Technology
The principle of electrochemical machining (ECM) is the anodic dissolution of a metallic workpiece at the interface to a liquid ionic conductor under the influence of electric charge transport. This erosion principle works independently from the mechanical hardness of the workpiece and is free of mechanical forces. The design of electrochemical machining processes is still performed ...
Experimental and Numerical Study of Microbial Improved Oil Recovery in a Pore Scale Model by using COMSOL
M. Shabani Afrapoli, L. Shidong, S. Alipour , and O. Torsaeter
Department of Petroleum Engineering and Applied Geophysics
A number of visualization experiments are carried out at the laboratory temperature with oil, brine and bacteria suspension for evaluating the performance of MIOR in a glass micromodel. The observations show the effects of bacteria on remaining oil saturation. The interfacial tension reduction, wettability alteration and flow pattern changes are recognized as active mechanisms. COMSOL ...
Rapid Control Prototyping for the Production of Functionally Graded Materials with Tailored Microstructural Properties Utilizing Comsol Multiphysics
J. Clobes[1,2], H.-J. Watermeier, M. Alsmann, H. H. Becker, and K. Steinhoff
University of Kassel - Chair of Metal Forming Technology, Kassel, Germany
Volkswagen AG, Kassel, Germany
Within the field of hot metal bulk forming the demand arises for fully three-dimensionally tailored properties at the microstructural level, nevertheless, reaching a predefined geometry with such tailored properties puts high requirements on the control mechanisms utilized in the process chain for combined heating, metal forming, and cooling processes. A simulation based rapid control ...
L. Wissmeier, and D. A.Barry
GIT HydroS Consult GmbH, Freiburg, Germany
EPFL, Lausanne, Switzerland
We present a software tool for simulations of subsurface flow and solute transport in combination with comprehensive intra-phase and inter-phase geochemistry. The software uses PHREEQC as a reaction engine to COMSOL Multiphysics®. The coupling with PHREEQC gives major advantages over COMSOL’s built-in reaction capabilities, i.e., the soil solution is speciated from its element composition ...
Keisoku Engineering System Co. Ltd.
The discharge properties in low pressure inductively coupled Ar/CH4 plasmas operating at an RF frequency of 13.56 MHz and total gas pressure of 20 mTorr are studied in this work. The calculation of gas flow is performed in coupling with the plasma simulation. The gas flow rate is varied from 20 to 1000 sccm. The species taken into account include electrons, six kinds of molecules, eleven kinds ...
S. Newbauer, D. Cook, and D. Pettis
Milwaukee School of Engineering
Designing a component with multiple functions, e.g. load bearing and noise attenuation, can increase the effectiveness of each component and reduce the complexity of the overall system, thereby improving system efficiency as well. Current multifunctional components include metal foam. It is posited that the cellular pores of the metal foam can be engineered and optimized for desired ...
F. Curtis, K. Ekici, and J. Freels
University of Tennessee, Knoxville, TN
Oak Ridge National Lab, Oak Ridge, TN
The High Flux Isotope Reactor, located at the Oak Ridge National Laboratory, is scheduled to undergo a conversion of the fuel used and this proposed change requires an extensive analysis of the flow through the reactor core. The core consists of approximately 500 very thin and long fuel plates through which the coolant (water) flows at a very high rate. Therefore, the design and the flow ...
P. Mercure, and R. Haley
The Dow Chemical Company, Midland, MI
ATM Research, Midland, MI
We demonstrate cartogram construction, where a geographical map is distorted to represent some measure, for example population, while trying to keep the shape of regions recognizable. We then apply this cartogram construction technique to optimize thermocouple locations. A heat generation and conduction model is used initialize the cartogram construction algorithm. A uniform distribution of ...
Designers of electro-optic modulators and related devices often use separate tools to study the optical and electrical portions of the device. The flexibility of COMSOL Multiphysics makes it possible to construct unified models of EO phenomena including realistic waveguide profiles and anisotropic material properties. We demonstrate the use of the RF Module to compute both RF and optical ...