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d25b28b7
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Commit
d25b28b7
authored
7 years ago
by
Christophe Geuzaine
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Update microstrip.pro
parent
ae2c6385
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Electrostatics/microstrip.pro
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d25b28b7
...
...
@@ -104,10 +104,10 @@ Group{
FunctionSpace
{
/* The function space in which we shall pick the electric scalar potential "v"
solution is defin
i
ed by
solution is defined by
- a domain of definition (the "Support": "Dom_Hgrad_v_Ele")
- a type ("Form0" means scalar field)
- a set of
scalar
basis functions ("BF_Node" means nodal basis functions)
- a set of basis functions ("BF_Node" means
scalar
nodal basis functions)
- a set of entities to which the basis functions are associated ("Entity":
here all the nodes of the domain of definition "NodesOf[All]")
- a constraint (here the Dirichlet boundary conditions)
...
...
@@ -116,11 +116,11 @@ FunctionSpace {
v(x,y) = Sum_k vn_k sn_k(x,y)
where the "vn_k" are the nodal values (connectors) and
"sn_k(x,y)" the
nodal basis functions. Not all connectors are unknowns of
the FE problem,
due to the "Constraint", which assigns particular values to
the nodes of
the Ground and Electrode regions. GetDP deals with that
automatically on
basis of the definition of the FunctionSpace. */
where the "vn_k"
coefficients
are the nodal values (connectors) and
"sn_k(x,y)" the
nodal basis functions. Not all connectors are unknowns of
the FE problem,
due to the "Constraint", which assigns particular values to
the
nodes of the
Ground and Electrode regions. GetDP deals with that
automatically on
basis of the definition of the FunctionSpace. */
{
Name
Hgrad_v_Ele
;
Type
Form0
;
BasisFunction
{
...
...
@@ -128,7 +128,7 @@ FunctionSpace {
Support
Dom_Hgrad_v_Ele
;
Entity
NodesOf
[
All
];
}
// using "NodesOf[All]" instead of "NodesOf[Dom_Hgrad_v_Ele]" is an
// optimization, which allows GetDP to not explicitly build the list of
// all nodes
// all
the
nodes
}
Constraint
{
{
NameOfCoef
vn
;
EntityType
NodesOf
;
NameOfConstraint
Dirichlet_Ele
;
}
...
...
@@ -140,8 +140,8 @@ Jacobian {
/* Jacobians are used to specify the mapping between elements in the mesh and
the reference elements (defined in standardized unit cells) over which
integration is performed. "Vol" represents the classical 1-to-1 mapping
between
elements of
identical
geometric
al dimension, i.e. in this case a
reference
triangle/quadrangle onto triangles/quadrangles in the z=0 plane
between identical
spati
al dimension
s
, i.e. in this case a
reference
triangle/quadrangle onto triangles/quadrangles in the z=0 plane
(2D <-> 2D). "Sur" would be used to map the reference triangle/quadrangle
onto triangles/quadrangles in a 3D space (2D <-> 3D), or to map the
reference line segment onto segments in 2D space (1D <-> 2D). "Lin" would
...
...
@@ -178,15 +178,15 @@ Formulation {
(-Div(epsilon Grad v) , v')_Vol_Ele = 0
holds for all so-called "test-functions" v', where (.,.)_D denotes an inner
product over
the
domain D. If the test-functions v' are differentiable,
product over
a
domain D. If the test-functions v' are differentiable,
integration by parts using Green's identity leads to finding v such that
(epsilon Grad v, Grad v')_Vol_Ele + (epsilon n.Grad v, v')_Bnd_Vol_Ele = 0
holds for all v', where Bnd_Vol_Ele is the boundary of Vol_Ele. In our
microstrip example this surface term vanishes, as
either
there is no test
function v' (on the Dirichlet boundary) or
the
"epsilon n.Grad v" is zero
(on the homogeneous Neumann boundary
)
. We are thus eventually looking for
microstrip example this surface term vanishes, as there is
either
no test
function v' (on the Dirichlet boundary)
,
or "epsilon n.Grad v" is zero
(on the homogeneous Neumann boundary. We are thus eventually looking for
functions v in the function space Hgrad_v_Ele such that
(epsilon Grad v, Grad v')_Vol_Ele = 0
...
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