finite element method (fem) & comsol multiphysics part i: quasi … · 2018-06-08 · 1 a....
TRANSCRIPT
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A. Rennings
Finite Element Method (FEM) & Comsol Multiphysics
Part I: Quasi-static Fields
Nächste Veranstaltungen…
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CoFT-1 Vorlesung
Fr. 06.11.2009, 12:00 - 13:30, BA 349
COMSOL-Demo, drei einfache quasi-statische Beispiel e
mögliche Termine für CoFT-Lab (ca. 90 min, BA 328)
Mo. AM PM
Di. AM PM
Do. AM PM
Fr. leider nicht möglich, wegen GET-Praktikum
„Kennenlernen“ der COMSOL-Software durch selbststän diges
Durcharbeiten von Tutorials (unter Anleitung!)
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Outline
Objectives and additional Material
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What can be solved using FEM?
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Static Fields I
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Static Fields II
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Electrodynamics
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What can be simulated using Comsol?
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What is FEM good for?
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The Finite Element Method
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Electrostatic model problem
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Trivial example: ideal homogeneous 2D plate capacit or
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Matrix equation: 1 st we neglect the essential BCs
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Matrix equation: natural BC on all boundaries,
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Matrix equation: Forcing the essential BC,
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Matrix equation: Forcing the essential BC,
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Matrix equation… only 3 unknowns left
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Demo 1: Surface charge of a metal cylinder
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Potential and total charge
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Value of surface integral: 3.109324e-10 [C], Expres sion: nD_emes, Boundaries: 2, 4, 5
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TEM transmission lines (TLs) with homog. material
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Demo 2: Square coaxial cable
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Demo 2: Characteristic impedance
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Quasi-TEM TLs with inhomogeneous material
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Quasi-TEM TLs: alternative approach, if µ = const
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Demo 3: Microstrip line
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Demo 3: Microstrip line
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Lecture on 13.11.2009…
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1st CoFT-Lab on COMSOL
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