Computer · Fluid Mechanics

In fluid flow, a boundary is classified as hydrodynamically rough when the ratio of average roughness height (k) to the viscous sublayer thickness (δ') satisfies which condition?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1k / δ' < 0.25
2k / δ' > 6.0✓
3k / δ' < 6.0
40.25 ≤ k / δ' ≤ 6.0

Correct answer

k / δ' > 6.0

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In fluid flow, a boundary is classified as hydrodynamically rough when the ratio of average roughness height (k) to the viscous sublayer thickness (δ') satisfies which condition?

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In fluid flow, a boundary is classified as hydrodynamically rough when the ratio of average roughness height (k) to the viscous sublayer thickness (δ') satisfies which condition?

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