文档介绍：Mastering AC/DC and RF Simulations
Magnus Olsson
SOL AC-SOL AC-DC模块
Contents
Introduction to the RF and AC/DC Modules
Formulations
Choosing solvers
Tips and tricks
Boundary settings
Handling high contrast
Global constraints
putations
New transient solver – tweaking the settings
Handling large scale differences
SOL AC-SOL AC-DC模块
COMSOL Products for ic Simulations
COMSOL Multiphysics
Acoustics
Module
Chemical Engineering Module
Structural Mechanics Module
Earth Science Module
Heat Transfer Module
MEMS Module
RF Module
CAD Import Module
Material Library
AC/DC
Module
Various binations with electric fields not available in AC/DC and RF modules
(Piezoelectric, Piezoresistive, ic, Electroosmotic, etc.)
I-V
terms
wave
terms
EM
SOL AC-SOL AC-DC模块
Maxwell’s Equations
Maxwell-Ampere’s law
Faraday’s law
Gauss’ law, electric
Gauss’ law, ic
Equation of Continuity
SOL AC-SOL AC-DC模块
Potentials
ic Vector Potential, A
Electric Potential, V
ic Scalar Potential, Vm
SOL AC-SOL AC-DC模块
Formulations
Electrostatics, unknown V:
Quasi-statics, unknown H:
Electric currents quasi-statics, unknown V:
ostatics, no currents:
SOL AC-SOL AC-DC模块
Formulations
Quasi-statics, unknown V and A:
ic Waves, unknown A, E or H:
SOL AC-SOL AC-DC模块
Choosing Solvers for ic Problems
SOL AC-SOL AC-DC模块
Solvers for vector field problems
All EM problems
Vector problems
Mixed vector-scalar
(. A-V)
Scalar problems
(V, Vm, Az, Hphi, etc.)
Inherent gauge
Gauge enforced
Ungauged
Gauge expected,
unenforced
Gauge freedom
SOR vector
Vanka
SOR gauge
SOR (plain)
No gauge issues
SOR (plain)
User decides
User decides
Physics
decides
&
Can use direct solvers
Can not use direct solvers
Category 1
Category 2
Category 3
Category 4
SOL AC-SOL AC-DC模块
Vector or scalar problem?
3D problems usually involve vector fields, except:
Electrostatics; conductive media
ostatics-no-currents (Vm)
Quasistatics, electric currents (V)
2D problems are usually p