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Clarified implementation of breaction #47

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Clarified implementation of breaction #47

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5dac8ea
Clarified implementation of breaction
Nov 21, 2022
ca4c03e
clean-up of unused variables and function calls
Nov 22, 2022
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12 changes: 8 additions & 4 deletions examples/Example121_PoissonPointCharge1D.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -4,11 +4,15 @@

Solve a Poisson equation
```math
- \Delta u = 0
- \Delta u = 0,
```

in $\Omega=(-1,1)$
with a point charge $Q$ at $x=0$.
in $\Omega=(-1,0)\cup (0,1)$ and
```math
u'_+(0) - u'_-(0) + Q = 0
```
at $x=0$. Unknown ``u`` corresponds to the electrostatic potential of a point charge $Q$ located at ``x=0``.
The subscripts ``+`` and ``-`` denote the one-sided limits ``u'_+(0):=\lim_{x\to 0, x > 0} u(x)`` and ``u'_-(0):=\lim_{x\to 0, x < 0} u(x)``, respectively.
=#

module Example121_PoissonPointCharge1D
Expand Down Expand Up @@ -48,7 +52,7 @@ function main(;nref=0,Plotter=nothing, verbose=false, unknown_storage=:sparse, b
end

## Define boundary reaction defining charge
## Note that the term is written on the left hand side, therefore the - sign
## Note that the breaction is implemented as a right hand side, therefore the - sign
function breaction!(f,u,node)
if node.region==3
f[1]=-Q
Expand Down
10 changes: 1 addition & 9 deletions examples/Example151_Impedance1D.jl
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Expand Up @@ -46,7 +46,7 @@ function main(;nref=0,Plotter=nothing,verbose=false, unknown_storage=:sparse,

X=VoronoiFVM.geomspace(0,L,h0,h1)

# Create discretitzation grid
# Create discretization grid
grid=VoronoiFVM.Grid(X)

# Create and fill data
Expand All @@ -67,7 +67,6 @@ function main(;nref=0,Plotter=nothing,verbose=false, unknown_storage=:sparse,


excited_bc=1
excited_bcval=1.0
excited_spec=1
meas_bc=2

Expand Down Expand Up @@ -122,21 +121,14 @@ function main(;nref=0,Plotter=nothing,verbose=false, unknown_storage=:sparse,
allomega=zeros(0)

# for calculated data
allI0=zeros(Complex{Float64},0)
allIL=zeros(Complex{Float64},0)

# for exact data
allIx0=zeros(Complex{Float64},0)
allIxL=zeros(Complex{Float64},0)

ω=ω0

UZ=unknowns(isys)
while ω<ω1

# solve impedance system
solve!(UZ,isys,ω)

# calculate aproximate solution
# obtain measurement in frequency domain
IL=impedance(isys,ω,steadystate, dmeas_stdy, dmeas_tran)
Expand Down