Gravity current

From AMS Glossary
Jump to: navigation, search


gravity current

A flow driven by horizontal pressure gradients, due typically to the flow of a fluid of one density intruding into an ambient fluid of different density.

In nonrotating fluid, the head of the current travels with uniform horizontal speed
ams2001glos-Ge43
in which g′ is the reduced gravity, H is the current depth, and C is a constant of order unity. Sea breezes, landslides, and some instances of cold water formation are common manifestations of gravity currents in geophysical circumstances.

Personal tools
Namespaces
Variants