Red blood cell: an initial shape

Red blood cell: an initial shape of the swelling ratio 0.7.

[Animation]

Obtain the initial shape of the cell:

The radius of the initial circle is 2.8 microns.
There are 76 mass points.
The time step=0.0000005 ms.
The swelling ratio=0.7
The bending constant is Kb = 5.0 e-10 Nm.
The spring constant is Kl = 5.0 e-8 Nm.
The penalty coefficient is Ks = 1.0 e-05 Nm.
The diameter of the cell is 7.423 microns.
The thickness of the cell is 2.622 microns.