Direct Numerical Simulation of 3D Salt Fingers: From Secondary Instability to Chaotic Convection
Simeonov, Julian A.
Stern, Melvin E.
Radko, Timour =
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The amplification and equilibration of three-dimensional salt fingers in unbounded uniform vertical gradients of temperature and salinity is modeled with a Direct Numerical Simulation in a triply periodic computational domain. A fluid dynamics video of the simulation shows that the secondary instability of the fastest growing square-planform finger mode is a combination of the well-known vertical shear instability of two-dimensional fingers [Holyer, 1984] and a new horizontal shear mode.
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