All posts by Walter Frei
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Learning from the Two-Capacitor Paradox: Do Capacitance and Inductance Exist?
What is the two-capacitor paradox? How can it be resolved with modeling and simulation? Do capacitance and inductance exist? Get answers here.
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Understanding Higher-Order Diffraction
Explore how to use the Ewald sphere to study diffraction from planar periodic structures. (Interact directly with the model to get the full picture!)
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Modeling Dispersion in an Electric Currents Model
As of COMSOL Multiphysics® version 6.2, new electrical dispersion modeling capabilities are available. This functionality is especially important for modeling insulators and living tissues.
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Modeling Periodic Electric Signals and Their Thermal Effects
Electrical pulse trains can be applied to human tissue for electroporation and thermal ablation. Learn how to model such signals via a Fourier transform approach.
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Understanding the Transient Electromagnetic Excitation Options
Looking to model electrical signals that vary arbitrarily in time? We suggest using the Electric Currents interface. Learn why here.
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Understanding the Excitation Options for Modeling Electric Currents
Learn about the capabilities of COMSOL Multiphysics® for modeling frequency-domain electric currents in this in-depth guide.
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Using Different Physics Interfaces for RF Electromagnetic Heating Models
RF heating problems can be modeled with both the RF Module and the AC/DC Module. Learn more about their capabilities here.
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Combining Volumetric Conductor Models and Lumped Elements
With the AC/DC Module, it is possible to connect a full-fidelity volumetric conductor model to a lumped circuit element model. Learn how here.