Hartmann number

The Hartmann number calculator computes the ratio of electromagnetic force to the viscous force.

INSTRUCTIONS: Choose units and enter the following:

• (B) Magnetic Field Intensity
• (L) Characteristic Length
• (σ) Electrical Conductivity
• (μ) Dynamic Viscosity

Hartmann number (Ha): The calculator returns the ratio as a real number.

The Math / Science

The Hartmann Number equation is used to computes the ratio of electromagnetic force to the viscous force. The Hartmann Number equation is as follows:

`Ha=B*Lsqrt(sigma/mu)`,

where:

• Ha = Hartmann Number
• B = magnetic field
• L = characteristic length scale
• σ = electrical conductivity
• μ = dynamic viscosity

This ratio was developed by Julius Hartmann of Denmark.

References

Wikipedia(https://en.wikipedia.org/wiki/Hartmann_number)