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In fluid dynamics, the Graetz number (Gz) is a dimensionless number that characterises laminar flow in a conduit. The number is defined as:
Additional recommended knowledge
When used in connection with mass transfer the Prandtl number is replaced by the Schmidt number which expresses the ratio of the momentum diffusivity to the mass diffusivity.
The quantity is named after the physicist Leo Graetz.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Graetz_number". A list of authors is available in Wikipedia.|