Computational Analysis of Scattering of Electromagnetic Waves by Particles A computational model of Mie scattering was developed using COMSOL Multiphysics® and its RF Module. It solves for the scattering off a dielectric, magnetic or metal spherical particle with radius a. The model geometry is shown in Figure 1. The air domain is […]
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AltaSim Receives SBIR Award AltaSim Technologies was recently awarded an SBIR Award from The United States Department of Energy. The award was given to help AltaSim further develop the technologies that drive additive manufacturing. Jeff Crompton, Ph.D., a principal here at AltaSim is quoted in the article. He states: “We plan to create
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Scattering of Electromagnetic Waves by Particles Interaction between electromagnetic waves and particles produce unique scattering patterns that are wavelength and particle size dependent. As electromagnetic waves propagate through matter they interact with particles or inhomogeneities and locally perturb the local electron distribution. This variation produces periodic charge separation within the particle causing oscillation
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COMSOL Tips & Tricks In our quest to keep uncovering the best COMSOL Tips & Tricks, we wanted to pass along a nice feature we had never seen until COMSOL published it in a recent blog – “The Graphics Window: Effective and Beautiful Postprocessing” . Within a day or two, almost all of us
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Ceramic Matrix Composites – Solidifying it all In the preceding Blogs on Ceramic Matrix Composites we have provided an outline of an intimately coupled multiphysics problem and how the controlling factors can be formulated to develop a predictive physics-based computational model. But what we really need to do if we are to help this
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Residual Stress and Distortion – Ceramic Matrix Composites Now that we have the analysis formulated to address the issues associated with fluid flow, reaction and thermal history the approach can be extended to predict the development of residual stresses and resulting component distortion in the final component. The residual stress generated during processing was
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Thermal-Ceramic Matrix Composites In addition to fluid flow and chemical reaction, the thermal response during infiltration of liquid is important to include in any analysis of the RMI process. For CMCs of interest for aerospace use the liquid is molten Silicon with a melting temperature of approximately 1687K, and during infiltration this thermal energy
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Reaction-Ceramic Matrix Composites In the last Blog we looked at analyzing fluid flow into a porous medium, in the manufacture of CMCs using the RMI process simultaneously with the fluid infiltration a reaction takes place between the infiltrating molten liquid and the porous preform. Thus the second step in developing a computational analysis of
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Ideation – What is that? To Ideate or not to Ideate? That is the question. “Ideate” simply means to form an idea, thought or image of; to form ideas, think. (Dictionary.com) “Ideation” is the process of forming and relating ideas. Ideation means to conceive or generate an idea and implement it. Ideation
Fluid Flow in Ceramic Matrix Composites In a previous Blog we discussed some of the background to the production of Ceramic Matrix Composites (CMCs) using the Reactive Melt Infiltration (RMI) process. In this Blog we will address some of the issues associated with the first step in the process: infiltration of molten material into a
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