Lawrence Berkeley National Laboratory, Hayward, CA, USA
A pocket-size portable particle size detector for diesel and cigarette smoke aerosols is being designed using particle size and composition methods. Aerodynamics, fluid properties, material composition and aerosol composition are taken into account. Testing methods for the design include using an impactor and virtual impactor with two quartz crystal resonators to determine particle composition ...
Development of Magnetic Field Components for the Polarisation Option of the Neutron Spectrometer FOCUS
L. Holitzner, U. Filges, J.P. Embs, T. Fennell, T. Panzner
Laboratory for Developments and Methods, Paul Scherrer Institut, Villigen, Switzerland
Laboratory for Neutron Scattering, Paul Scherrer Institut, Villigen, Switzerland
We show a new, favourable space-saving method to host a neutron polarizer in the iron-containing monochromator shielding of a time-of-flight spectrometer for cold neutrons. In this poster you can learn e.g., how to create a robust, homogeneous, rectangular magnetic field (here realized by permanent magnet queues inside an iron tube). The time-of-flight spectrometer FOCUS at the spallation ...
F. Alrumayan, A. Alghaith, J. Schneider, , M. Ahmed , M. Al-Qahtani
King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
A 3D model was developed using COMSOL Multiphysics® to study the flow dynamics of the water inside the geometry of the [13N] Ammonia target for medical application . The image attached shows a 3D model of the target. A significant improvement was noted after modifying the geometry as suggested by the model and delivery time of radioactive solution was dramatically reduced. Water and aluminum ...
COMSOL Multiphysics® Simulation of Heat Generation from Hydrogen/Deuterium Loading of Nickel Alloy Nanoparticles - new
G. Miley, A. Osouf, B. Stunkard, T. Patel, E. Ziehm , A. Krishnamurthy, K. J. Kim
University of Illinois at Urbana Champaign, Champaign, IL, USA
A key issue for the development of a LENR power unit involves the measurement and energy output of the reaction. Our team is currently studying a gas loaded nanoparticle-type cluster power unit  which pressurizes various nanoparticle alloys with either deuterium or hydrogen. The principal elements in the various nanoparticle alloys are Nickel, Palladium and Zirconium, with each alloy ...
Numerically Closing the Loop of the Adaptive Optics Sensor: the Validation of the COMSOL Multiphysics® Simulation - new
C. Del Vecchio, R. Briguglio, A. Riccardi
National Institute for Astrophysics, Arcetri Astrophysical Observatory, Florence, Italy
As any other modelling of a physical behavior, the numerical simulation of the mechanical response of an adaptive secondary mirror requires that the results match the experimental data. Such an agreement was recently demonstrated for the local mirror stiffness of the LBT and VLT Deformable Mirrors; a reliable modeling is a good tool for the extrapolation of the missing optical data (spider ...
R. Purkayastha, R. McMeeking
Cambridge University, Cambridge, UK
University of California, Santa Barbara, CA, USA
Due to computational considerations most models of lithium storage particles in batteries incorporate spherical particles. However most storage particles used in battery electrodes tend to be irregular in shape with sharp edges and extended aspect ratios. The change of the relative surface area to the volume of the particle can lead to a change in the stress response of the particle for the same ...
R. K. Banyal
Indian Institute of Astrophysics, Bengaluru, Karnataka, India
The numerical study of temperature and acceleration sensitivities of a dual cavity Fabry-Perot (FP) interferometer is carried out using finite element method. The optical cavities are formed by machining two side-by-side circular bore of 12 mm each on a monolithic block of low expansion material. One cavity will be used to generate broadband channel spectra for accurate wavelength calibration of ...
A. G. Dixon , D. S. Polcari , A. D. Stolo , M. Tomida ,
 Department of Chemical Engineering, Worcester Polytechnic Institute, Worcester, MA, USA
For design of radial flow fixed bed reactors, it is important to ensure proper flow distribution through the catalyst bed. A 2D axisymmetric model of a radial-flow reactor was used to evaluate flow maldistribution through the catalyst bed and the pressure drop through the reactor for a specified flow rate. Effects of different catalysts, screen sizes and flow direction were simulated. Factors ...
M. Gobbert , K. M. Kalayeh , J. S. Graf ,
 Department of Mathematics and Statistics, University of Maryland - Baltimore County, Baltimore, MD, USA
 Department of Mechanical Engineering, University of Maryland - Baltimore County, Baltimore, MD, USA
Numerical theory provides the basis for quantification of the accuracy and reliability of a FEM solution by error estimates on the FEM error vs. the mesh spacing of the FEM mesh. This paper presents techniques needed in COMSOL Multiphysics® software to perform computational studies for elliptic test problems in two and three space dimensions that demonstrate this theory by computing the ...
Novel Approach for Teaching Microchemical Systems Analysis to Chemical Engineering Students Using Interactive Graphical User Interfaces (GUIs) - new
A. Nagaraj , P. L. Mills ,
 Department of Chemical and Natural Gas Engineering, Texas A&M University - Kingsville, Kingsville, TX, USA
Chemicals are an integrated part of our daily life. While chemicals are significant contributor to a nation’s economy, sound management of chemical production is essential for environmentally friendly operation without maximizing operational costs. Next generation technologies must be developed that potentially change the chemical plants and process engineering giving rise to safe, compact, ...