Stuart number

The Stuart number ( N, also English interaction parameter) is a dimensionless parameter of fluids, ie gases or liquids.

It is defined as the ratio between electromagnetic and inertial forces, there is an estimate of the relative influence of a magnetic field to a flow. Significantly, such a estimate for flows of conducting fluids, such as in fusion reactors, the steel casting or in plasmas.

Definition

• - Hartmann number
• - Reynolds number
• - Magnetic flux density
• - Characteristic length of the system
• - Electrical conductivity
• - Dynamic viscosity, sometimes