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The Ohnesorge number, Oh , is a dimensionless number that relates the viscous and surface tension force.
Additional recommended knowledge
It is defined as:
The Ohnesorge number for a 3 mm diameter rain drop is typically ~0.002. Larger Ohnesorge numbers indicate a more influence of the viscosity .
This is often used to relate to free surface fluid dynamics such as dispersion of liquids in gases and in spray technology. 
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ohnesorge_number". A list of authors is available in Wikipedia.|