Department of Chemical Engineering, University of Washington
Viscoelastic fluids have first normal stress differences even in rectilinear flow. Thus, they are more complicated than purely viscous non-Newtonian fluids modeled as a power-law model or Carreau model. Viscoelastic effects must be included when modeling the flow of polymer melts and concentrated polymer solutions in situations for which the normal stresses matter. The extrudate swell problem ...
Material Property Data
These slides are from a Poster presented at the Boston User’s Conference. They will explain how you can use MatWeb to automatically add any of our 60,000 material specifications to you COMSOL material library.
This presentation summarizes three different types of modeling using COMSOL Multiphysics. It is divided into three parts: Compressible flow, Multiphase flow, and Plasma Simulations. For the first part, we perform a special case study of the Mass Flow Verifier. A Mass Flow Verifier validates the accuracy of a Mass Flow Controller by measuring the rate of change of pressure in a fixed volume. ...
Optimization of an Adiabatic Demagnetization Refrigerator’s Superconducting Magnet Shield for the Micro-X High-Resolution Microcalorimeter X-ray Imaging Rocket
E. Figueroa-Feliciano, M. Cavolowsky, C. Macklin, Z. Li, A. Sharer, and A. Walker
 Massachusetts Institute of Technology, Cambridge, MA
 Olin College, Needham, MA
We are working on the design of a sounding rocket payload to perform high-resolution imaging spectroscopy of the Puppis A supernova remnant. This rocket payload uses Transition-Edge-Sensor Microcalorimeters, which are superconducting detectors that obtain very high (2 eV FWHM at 6 keV) imaging spectra. These devices need to be cooled to 50 mK, for which we are designing an adiabatic ...
TEL Technology Center, America, LLC
Hydrogen plasma is typically used in the semiconductor industry for materials processing, surface preparation and cleaning of silicon wafers and thin films. In this contribution, we developed a 2D/3D plasma fluid model as described by the set of the species and energy balance equations in a generic semiconductor tool chamber with remote Inductively Coupled Plasma (ICP) source. Background ...
M. Eltoukhy, S. Asfour,, M. Almakky, and C. Huang
 Department of Industrial Engineering, University of Miami
 Department of Production Engineering, Alexandria University
 Department of Biomedical Engineering, University of Miami
In this paper a transient analysis of the thermoelastic contact problem for disk brakes with frictional heat generation is performed using the finite element analysis (FEA) method. The computational results are presented for the distribution of the temperature on the friction surface between the contacting bodies (the disk and the pad). Also, the influence of the material properties on the ...
Joel L. Plawsky and Howard Littman
Department of Chemical and Biological Engineering
Rensselaer Polytechnic Institute
Since aerogel materials are open cell, inorganic foams, the surface pores of the material must be sealed for large scale application. Here we discuss the design and development of a spout fluid bed system for producing coated aerogel particle material. COMSOL Multiphysics was used in the design of the system to track the details of the flow field and individual aerogel particle trajectories. ...
Simulation of the Capacitive Double Layer at the Interface between Microelectrodes and Cortical Tissue Using Comsol Multiphysics and SPICE Modeling
R.M. Field, and M. Ghovanloo
NC-Bionics Laboratory, North Carolina State University
The interface between microelectrodes and biological tissue is of great interest to researchers working on extracellular stimulation. In this paper, we outline a method used to model the complex double layer capacitance at the interface between the electrodes and the cortex. This model relies on the combined power of SPICE, MATLAB, and COMSOL Multiphysics. The goal of this model is to ...
B. Srinivasan, S. Tung, Y. Li, and M. Varshney
 Department of Mechanical Engineering, University of Arkansas
 Department of Biological and Agricultural Engineering, University of Arkansas
The impedance based biosensor utilizes the electrical impedance measurements between interdigitated electrodes integrated into a microchannel containing the target cells in a suspension medium. The detection is based on measuring the change in impedance caused by the presence of bacteria. In this paper we describe the simulation of impedance measurements using the electromagnetics module of ...
Tanai L. Marin,
Faculty of Physics and Mathematics Sciences,
Department of Mining Engineering,
University of Chile,
A method for the solidification of a free surface liquid phase is presented and solved with COMSOL Multiphysiscs using a fixed grid. In this case, the Level set method with phase re-injection for mass conservation is used to prescribe the movement of the free surface of the liquid droplet, whereas a modified version of the method presented by Voller and Prakash is used to account for the ...