rameters used for every constellation for the

permanent magnet excitation

Peripheral resistance is the resistance blood cells and plasma encounter when they contact the blood vessel walls. This is affected by the blood vessels' diameter, viscosity, and total length. The peripheral resistance can be mathematically related to the diameter, viscosity, and length using Poiseuille's law, where the resistance (R, the change in pressure divided by the blood flow) is directly proportional to the length (L) and viscosity (ηη<math display="inline"><mi>η</mi></math>), and inversely proportional to the radius (r) to the fourth power:

The viscosity of a fluid is that property which determines the amount of its resistance to a shearing force.