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Boundary Layer Thickness

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Estimate laminar and turbulent flat-plate boundary-layer thickness and skin-friction coefficients.

Pa s

Turbulent thickness

0.02 m

24.3 mm at x = 1.50 m

Local Reynolds number

6,162,660.70

based on freestream and plate station

Average Cf comparison

0.00053 / 0.00325

laminar / turbulent flat-plate estimate

Flat-plate growth at the selected station

Laminar and turbulent correlations give different boundary-layer thickness and skin-friction limits.

Re_x = 6,162,661

smooth zero-pressure-gradient plateU_infinity = 60.0 m/sx = 1.50 mturbulent delta = 24.3 mmlaminar delta = 3.0 mmSkin-friction coefficientlaminar 0.00053turbulent 0.00325

Turbulent thickness

24.3 mm

8.1 x laminar estimate

Laminar thickness

3.0 mm

Blasius smooth-plate estimate

Skin-friction ratio

6.1 x

turbulent average Cf versus laminar

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