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Consider a laminar boundary layer over a heated flat plate. The free stream velocity is U∞. At some distance x from the leading edge the velocity boundary layer thickness is δv and the thermal boundary layer thickness is δT. If the Prandtl number is greater than 1, then
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- δv > δT
- δT > δv
- δv~ δT~(U∞x)–1/2
- δv ~ δT~x–1/2
Correct Option: A
| Prandtl number = | Molecular diffusivity of heat |
From question, since prandtl number > 1
∴ Velocity boundry thickness (δv) > thermal boundary thickness (δt)
