Hartmann number

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Science and technology

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What Wikipedia says

The Hartmann number (Ha) is the ratio of electromagnetic force to the viscous force, first introduced by Julius Hartmann (1881 – 1951) of Denmark. It is frequently encountered in fluid flows through magnetic fields. It is defined by:

Excerpt from the Wikipedia article “Hartmann number”, under the CC BY-SA 4.0 license. Read the article on Wikipedia