In [6]:

    

using Plots;
gadfly();


    

In [7]:

    

include("../fdtd/update.jl");
include("../fdtd/sources.jl");
include("../fdtd/boundaries.jl");
using update;
using sources;


    

    




WARNING: replacing module globals
WARNING: replacing module update
WARNING: replacing module globals
WARNING: replacing module sources
WARNING: replacing module boundaries

In [8]:

    

#Global parameters
size = 200;
endTime = 500;
num_snaps = 250;
snap_step = div(endTime, num_snaps);

LOSS = 0.02;
eps1 = 9;

LossLayerStart = 180;

#Grid

# Magnetic
hy = zeros(size-1);
mu = ones(size-1);

chyh = ones(size);
chye = ones(size);


# Electric
ez = zeros(size);
eps = ones(size);

cezh = ones(size);
ceze = ones(size);




for i in 100:size
    eps[i] = eps1;
end

for i in LossLayerStart:size
    ceze[i] = (1.0 - LOSS) / (1.0 + LOSS);
    cezh[i] = 1.0 / (1.0 + LOSS);
end
for i in LossLayerStart:size-1
    chyh[i] = (1.0 - LOSS) / (1.0 + LOSS);
    chye[i] = 1.0 / (1.0 + LOSS);
end


# output params
ez_snapshot = Array{Any}(num_snaps);
hy_snapshot = Array{Any}(num_snaps);


    

In [9]:

    

# Time steps

for time in 1:endTime
    # Incident
    # ez_inc, hy_inc = sources.gaussian_source(50, time);
    delay = 30.
    width = 100.
    
    ez_inc = exp(-(time + 0.5 - (-0.5) - delay) * (time + 0.5 - (-0.5) - delay) / width);
    hy_inc = exp(-(time - delay) * (time - delay) / width) / globals.imp0;
    
    #
    # Magnetic
    #
        
    # Interior update
    update.update_magnetic_field!(ez, hy, mu, chyh, chye);    
    
    # TFSF
    hy[49] -= hy_inc 
    
    #
    # Electric
    #
    
    # ABC
    # boundaries.trivial_abc!(ez, size);
    boundaries.trivial_abc!(ez, 1, false);    
    
    # Interior update
    update.update_electric_field!(ez, hy, eps, cezh, ceze);
    
    # PEC
    # boundaries.pec_boundary!(ez, size);
    
    # TFSF
    ez[50] += ez_inc 
 
    # Snapshots for animation
    if mod(time, snap_step) == 0
        ez_snapshot[div(time,snap_step)] = (time, copy(ez))
        hy_snapshot[div(time,snap_step)] = (time, copy(hy).*globals.imp0)        
    end
    
end


    

In [11]:

    

anim = Animation()

for i = 1:num_snaps
    p = plot(1:size, ez_snapshot[i][2], lab="Ez")
    plot!(1:size-1, hy_snapshot[i][2], lab="Hy*imp0")
    
    time = ez_snapshot[i][1]
    plot!(ann=[(150, 1.5, "time =$time")])
    plot!(ann=[(0, 1.1, "ABC")])
    
    plot!(ann=[(80, 1.2, "Eps = 1")])
    plot!(ann=[(100, 1.1, "Eps = 9")])    
    plot!([100, 100], [-2, 2])
    
    plot!(ann=[(180, 1.1, "PML")])
    plot!([180, 180], [-2, 2])
    
    plot!(xlims=(1, 200), ylims=(-2, 2))
    frame(anim, p)
end
gif(anim, "./07_impedance.gif", fps=15)


    

    




[Plots.jl] Initializing backend: gadfly






    




INFO: Saved animation to /media/storage/Documents/Github/1d-fdtd/examples/07_impedance.gif






    
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