Mean flow

In fluid dynamics, the fluid flow is often decomposed into a mean flow – and deviations from the mean. The averaging can be done either in space or in time, or by ensemble averaging.

Example

Calculation of the mean flow may often be as simple as the mathematical mean: simply add up the given flow rates and then divide the final figure by the number of initial readings.

For example, given two discharges (Q) of 3 m³/s and 5 m³/s, we can use these flow rates Q to calculate the mean flow rate Qmean. Which in this case is Qmean = 4 m³/s.

gollark: IIRC EMPs mostly induce currents in longer wires.
gollark: Doubtful, datacentres have a lot of backup power and mostly use nonvolatile memory.
gollark: It says "through disease or starvation", which sounds right.
gollark: Over the long term, no electricity means industrial farming and water supply collapse.
gollark: Me too. Also a slimesling.

See also

References
  • Craik, Alex D. D. (1988), Wave interactions and fluid flows, Cambridge University Press, ISBN 978-0-521-36829-2
  • Tennekes, Hendrik; Lumley, John L. (1972), A first course in turbulence, MIT Press, ISBN 978-0-262-20019-6


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