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Electrical Conductivity Modeling and Validation in Unidirectional Carbon Fiber Reinforced Polymer Composites

Carbon fiber (CF) reinforced polymer composites (CFRP) have begun to replace Al-Zn-Mg alloys in applications which require high strength-to-weight ratios. The anisotropy of CFRP composites is a result of melt crystallized extrusion techniques that impart an inherent directionality to the CFs and the associated material’s properties ...
www.comsol.com/paper/15958

Anisotropic Heat Transfer in Orthocyclically Wound Coils

Tecnotion produces linear motors for the high tech automation and semiconductor markets. Orthocyclically wound coils give the best performance because the largest number of windings can be packed into a given volume, as opposed to "wild winding", where the windings fall where they may. Additionally, the anisotropic heat conduction perpendicular to the wire direction is optimized because each winding is positioned exa ...
www.comsol.com/paper/14885

anisotropic properties

Hi Normally you need to define either a new Linear Elastic Material node with Anisotropy material in the settings, and then define the tensor w.r.t the global coordinate system, or change the default Lienar Elastic Material node ...
www.comsol.com/community/forums/general/thread/16150

Local coordinate system for material properties

Dear all, we are trying to do an eigenfrequency analysis of a car tire and are struggling with defining the correct elastic material properties for the tire plies. The tire plies are fibrous composites consisting of steel cords embedded in a rubber matrix. The steel coords are aligned at a certain, non-zero, angle with respect to the tire circumference (see the attached image), meaning that the ply is anisotrop ...
www.comsol.com/community/forums/general/thread/36480

Validation of Measurement Strategies and Anisotropic Models Used in Electrical Reconstructions

. We tested solution stability in one anisotropic case by varying mesh anisotropy. In our case, good approximations to the true anisotropic solutions were usually found only at extremely fine mesh levels. ...
www.comsol.com/paper/5298

Investigating the Impacts of Hydrogeological Parameters on DSI Efficiency through Numerical Simulation

Düsensauginfiltration (DSI),‘nozzle-suction-infiltration’, is a new method for dewatering that avoids groundwater abstraction from the aquifer. Drawdown is achieved via pumping of groundwater at upper abstraction section, meanwhile, all the pumped water is injected through the same borehole, but in greater depth. We use COMSOL Multiphysics® for the development of a 2D model that simulates groundwater fl ...
www.comsol.com/paper/15415

Biosimulation of Normal Pressure Hydrocephalus Using COMSOL Multiphysics®

. To find out the influence of the anisotropy in permeability, two models are tested under the same CSF pressure gradient. ...
www.comsol.com/paper/6750

Modeling the Radiation of a Commercial Sensor, the Fish Fat Meter, in a Multilayer Biological Material

.Modeling allowed for the study of parameters corresponding to potential measurement bias: muscle anisotropy, gradient in fat content, skin thickness, and under-skin fat thickness. ...
www.comsol.com/paper/3318

Magnetic Nanoparticles for Novel Granular Spintronic Devices

Superparamagnetic nanoparticles have a wide range of applications in modern electric devices. Recent developments have identi fied them as components for a new type of magnetoresistance sensor. We propose a model for the numeric evaluation of the sensor properties. Based on the solutions of the Landau-Lifshitz-Gilbert equation for a set of homogeneously magnetized spheres arranged in highly symmetric monolayers, we a ...
www.comsol.com/paper/10478

Multiphysics Modeling for Petroleum Geomechanics

-Rivera’s current focus of attention is the impact of heterogeneity and material anisotropy on the evaluation of wellbore stability, productivity, in-situ stress, and completion design for tight gas shale reservoirs. Dr. Suarez-Rivera has 8 years of experience as a service field engineer with Dowell Schlumberger, and 14 years experience as a scientist and consultant in petroleum related rock mechanics, with the ...
www.comsol.com/paper/1784

Double Gate MOSFET modeling

), by introducing an anisotropy scale factor in its geometry description. The model shows the involved phenomenon (appearance of channels…) and gives the intended drain current curves versus gate voltages: Id (Vg1,Vg2) using a dedicated written MATLAB file ...
www.comsol.com/paper/1190

Simulation of Dendritic Solidification in Cubic and HCP Crystals by Cellular Automaton and Phase-Field Models

A cellular automaton (CA)-finite element (FE) model and a phase field (PF)-FE model were used to simulate equiaxed dendritic growth during solidification of cubic and hexagonal crystals. The governing equations of PF model include three coupled partial differential equations (PDE) for evolution of concentration, temperature, and non-conserved PF variable. These PDEs were solved using the mathematics module in COMS ...
www.comsol.com/paper/10748

Defining Curvilinear Coordinates for Anisotropic Materials

A lot of materials have anisotropic properties and, in many cases, the anisotropy follows the shape of the material. COMSOL Multiphysics offers different methods for defining curvilinear coordinate systems. Here, we discuss the concepts of each and when to use which method .... It is almost impossible to express the anisotropy referring to the well-known Cartesian coordinate system. If we had a coordinate system that follows the fibers, it would be straightforward to specify the anisotropic properties ...
www.comsol.com/blogs/defining-curvi...r-coordinates-anisotropic-materials

Modelling AVO signals from laboratory acoustics and seismic (MASLAS)

The Amplitude vs. Offset (AVO) technique infers the elastic properties of geological targets from pre-stack seismic data. AVO analysis significantly reduces the drilling risks for oil and gas exploration and development, particularly in the Gulf of Mexico. One strand of the current, EC-funded ADEMA Project is to evaluate AVO in coal-bearing strata. The target application areas are long-wall extraction in ...
www.comsol.com/paper/2628

Lithium-Ion Battery Simulation for Greener Ford Vehicles

Dr. Bernardi is a Research Engineer with Ford Motor Company in Dearborn, MI. Her research focuses on the analysis and simulation of electrochemical energy-storage and conversion systems. In particular, Dr. Bernardi develops mathematical models that predict system behavior and identify governing physicochemical processes. Experimental investigations support model development, analysis, and validation. At Ford she is c ...
www.comsol.com/paper/10254

COMSOL Implementation for Upscaling of Two-Phase Immiscible Flows in Communicating Layered Reservoirs

Waterflooding is widely used in secondary oil recovery. The physics is described by the model of two-phase flow in porous media. The aim of the present work is to implement this model in COMSOL Multiphysics and to simulate the process of waterflooding. It is analyzed in two dimensions. We use layered reservoir in our study. The numerical implementation is validated, comparing with analytical solution based on asympt ...
www.comsol.com/paper/8179

Solution of Inverse Thermal Problem for Assessment of Thermal Parameters of Engineered H2 Storage Materials

storage system with a low volume. Compaction can cause thermal conductivity anisotropy due to the alignment of the thermal conductivity enhancing phase in a preferred direction. Quantifying the thermal conductivity anisotropy of the H2 ...
www.comsol.com/paper/12000

Numerical Modeling of a MEMS Sensor with Planar Coil for Magnetic Flux Density Measurements

The silicon cantilever with the planar coil was applied to the magnetic flux density measurements. The influence of shape and dimensions of planar coil on magnetic energy density was described. In cause of magnetic anisotropy of analyzed silicon structure FEM method and couple field method was applied in simulation ...
www.comsol.com/paper/13409

Finite Element Approach for 2D Micromagnetic Systems

The imbalance between the four fundamental magnetic interactions (the magneto-crystalline anisotropy, the exchange and magnetostatic interactions, and the Zeeman coupling) is responsible for a very large diversity of magneticbehaviors that researchers try to explore anduse for technical applications ...
www.comsol.com/paper/2904

Virtual Homogeneous Isotropic and Real Unhomogeneous Anisotropic Metamaterials

. Applications on highly directive antenna are then possible. The directivity of the antenna comes from the Snell-Descartes’s law exploitation. Some simulations performed with FEMLAB will unambiguously show this property. In the last part we will discuss the anisotropy of real metamaterials which are also strongly unhomogeneous. ...
www.comsol.com/paper/1069

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