hydraulic analogy

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hydraulic analogy

[hī′drȯ·lik ə′nal·ə·jē]
(fluid mechanics)
The analogy between the flow of a shallow liquid and the flow of a compressible gas; various phenomena such as shock waves occur in both systems; the analogy requires neglect of vertical accelerations in the liquid, and restrictions on the ratio of specific heats for the gas.
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