答案1
遗憾的是,由于圆角,箭头尖端与路径的对齐存在一些误差。本来可以直接装饰路径,但路径上的准确位置很难计算。
\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{decorations.markings, arrows.meta}
\begin{document}
\begin{tikzpicture}[>=Stealth]
\draw (0,0) circle (2);
\foreach \r/\s in {1.6/.2, 1.2/.6} {
\draw[rounded corners]
({acos(\s/\r)}:\r) arc
({acos(\s/\r)}:{-acos(\s/\r)}:\r) --
cycle;
\draw[rounded corners]
({180+acos(\s/\r)}:\r) arc
({180+acos(\s/\r)}:{180-acos(\s/\r)}:\r) --
cycle;
}
\foreach \a/\r/\t in {
75/2/255, 105/2/105, 75/-2/255, 105/-2/105,
0/.2/0, 30/1.6/210, -30/1.6/150,
0/.6/0, 30/1.2/210, -30/1.2/150,
0/-.2/0, 30/-1.6/210, -30/-1.6/150,
0/-.6/0, 30/-1.2/210, -30/-1.2/150
} {
\draw[draw=none, postaction={decorate},
decoration={markings, mark=at position .5 with {\arrow[rotate=\t]{>}}}]
([yshift=-1pt]\a:\r) -- ([yshift=1pt]\a:\r);
}
\draw[->] (0,1.6) -- (0,2);
\draw[->] (0,-2) -- (0,-1.6);
\draw[-{>[open]}] (0,2.6) node[right] {$w_\infty$} -- (0,2.2);
\end{tikzpicture}
\end{document}