求解周期性边界条件下的泊松方程

在曲线边界上求解具有周期性边界条件的泊松方程.

指定一个区域.

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\[CapitalOmega] = RegionDifference[RegionUnion[Disk[], Rectangle[{0, -1}, {2, 1}]], Disk[{2, 0}]];

求解具有周期性边界条件的偏微分方程，其中左手边的解映射到右手边的区域.

In[2]:=

ufun = NDSolveValue[{-\!\( \*SubsuperscriptBox[\(\[Del]\), \({x, y}\), \(2\)]\(u[x, y]\)\) == 1, PeriodicBoundaryCondition[u[x, y], (x - 2)^2 + y^2 == 1, Function[x, x - {2, 0}]], DirichletCondition[ u[x, y] == 0, (0 <= x <= 2 && (y <= -1 || y >= 1))]}, u, {x, y} \[Element] \[CapitalOmega]];

可视化方程的解.

In[3]:=

ContourPlot[ufun[x, y], {x, y} \[Element] \[CapitalOmega], ColorFunction -> "TemperatureMap", AspectRatio -> Automatic] // Quiet

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