Local derivative

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local derivative

The rate of change of a quantity with respect to time at a fixed point of a fluid, ∂f/∂t.

It is related to the individual derivative df/dt through the expression
ams2001glos-Le26
where f is a thermodynamic property f(x, y, z, t) of the fluid, V the vector velocity of the fluid, and the del operator.
See partial derivative.

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