Joukowsky transformation of a circle centered at (1,1)\left(1,1\right) of radius 11 is a curve resembling a heart.

Joukowsky heart

To be specific, it is

{1+i+eit+11+i+eit|t[0,2π)} \left\{1+\mathrm i+\mathrm e^{\mathrm it}+ \frac1{1+\mathrm i+\mathrm e^{\mathrm it}} \,\middle|\,t\in\left[0,2\pi\right)\right\}

on the complex plane.