Hartmann Number

Hartmann number, abbreviated as Ha, a dimensionless number, the ratio of electromagnetic force to the viscous.

 

Hartmann Number formula

\(\large{ Ma =  B \; l \; \sqrt{ \frac{ \sigma }{ \mu } }  }\)

Where:

\(\large{ Ha }\) = Hartmann number

\(\large{ l }\) = characteristic length

\(\large{ \mu }\)  (Greek symbol mu) = dynamic viscosity

\(\large{ \sigma }\)  (Greek symbol sigma) = electrical conductivity

\(\large{ B }\) = magnetic field