Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Electric Field in Insulation Considering Conductivity and Permittivity
Posted 28 giu 2015, 15:04 GMT-4 Low-Frequency Electromagnetics, Modeling Tools & Definitions, Parameters, Variables, & Functions, Studies & Solvers Version 5.0 0 Replies
Please login with a confirmed email address before reporting spam
I have a physical model of a slab of a dielectric under a voltage difference, let say V volts, in which I want to compute electric field distribution (E) considering the influence of permittivity (ε) and conductivity (σ) of the dielectric simultaneously.
I tried two Physics in COMSOL: Electrostatics (es) and Electric Current (ec) but:
In Electrostatic, COMSOL computes the following equations, viz, just considers the permittivity (ε)
∇.V=ρ_v And E=-∇.V (1)
And, in Electric Current (ec), COMSOL computes these equations:
∇.j=Q_j , J=σE+j_e and E=-∇.V (2)
But I want to solve the following equation by COMSOL:
∇( -σE - ε∇(∂V/∂t )=0 (3)
In which, both permittivity and conductivity appeared.
Does any boy have any idea which Physics in COMSOL to use to solve equation (3) in my model?
ps: ρ_v means: ρ subscript v
Hello Enzo Vitali
Your Discussion has gone 30 days without a reply. If you still need help with COMSOL and have an on-subscription license, please visit our Support Center for help.
If you do not hold an on-subscription license, you may find an answer in another Discussion or in the Knowledge Base.