From 39c6f2e7ab43d8273c8820af1b0df06165ee106f Mon Sep 17 00:00:00 2001
From: Christophe Geuzaine <cgeuzaine@ulg.ac.be>
Date: Fri, 16 Mar 2018 12:10:56 +0100
Subject: [PATCH] up
---
Magnetostatics/electromagnet.pro | 30 +++++++++++++++---------------
1 file changed, 15 insertions(+), 15 deletions(-)
diff --git a/Magnetostatics/electromagnet.pro b/Magnetostatics/electromagnet.pro
index 05bed25..57774df 100644
--- a/Magnetostatics/electromagnet.pro
+++ b/Magnetostatics/electromagnet.pro
@@ -15,7 +15,20 @@
Run (button at the bottom of the left panel)
------------------------------------------------------------------- */
-/* Electromagnetic fields expand to infinity. The corresponding boundary
+/* This model computes the static magnetic field produced by a DC current. This
+ corresponds to a "magnetostatic" physical model, obtained by combining the
+ time-invariant Maxwell-Ampere equation (curl h = js, with h the magnetic
+ field and js the source current density) with Gauss' law (Div b = 0, with b
+ the magnetic flux density) and the magnetic constitutive law (b = mu h, with
+ mu the magnetic permeability).
+
+ Since Div b = 0, b can be derived from a vector magnetic potential a, such
+ that b = curl a. Plugging this potential in Maxwell-Ampere's law and using
+ the constitutive law leads to a vector Poisson equation in terms of the
+ magnetic vector potential: curl(nu curl a) = js, where nu = 1/mu is
+ the reluctivity.
+
+ Electromagnetic fields expand to infinity. The corresponding boundary
condition can be imposed rigorously by means of a gometrical transformation
that maps a ring (or shell) of finite elements to the complementary of its
interior. As this is a mere geometric transformation, it is enough in the
@@ -38,20 +51,7 @@
editable in the GUI before running the model. Such variables are called
ONELAB variables (because the sharing mechanism between the model and the GUI
uses the ONELAB interface). ONELAB parameters are defined with a
- "DefineNumber" statement, which can be invoked in the .geo and .pro files.
-
- This model computes the static magnetic field produced by a DC current. This
- corresponds to a "magnetostatic" physical model, obtained by combining the
- time-invariant Maxwell-Ampere equation (curl h = js, with h the magnetic
- field and js the source current density) with Gauss' law (Div b = 0, with b
- the magnetic flux density) and the magnetic constitutive law (b = mu h, with
- mu the magnetic permeability).
-
- Since Div b = 0, b can be derived from a vector magnetic potential a, such
- that b = curl a. Plugging this potential in Maxwell-Ampere's law and using
- the constitutive law leads to a vector Poisson equation in terms of the
- magnetic vector potential: curl(nu curl a) = js, where nu = 1/mu is
- the reluctivity. */
+ "DefineNumber" statement, which can be invoked in the .geo and .pro files. */
Group {
// Physical regions:
--
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