Hartmann number

Hartmann number (Ha) is the ratio of electromagnetic force to the viscous force first introduced by Hartmann. It is defined by: where * B is the magnetic field * L is the characteristic length scale * σ is the electrical conductivity * μ is the dynamic viscosity

Hartmann number

Hartmann number (Ha) is the ratio of electromagnetic force to the viscous force first introduced by Hartmann. It is defined by: where * B is the magnetic field * L is the characteristic length scale * σ is the electrical conductivity * μ is the dynamic viscosity