Question

What is the value of the thickness of the boundary layer at leading edge of the plate?

Answer 1

Along the flow direction, the boundary layer's thickness varies. For ReT values between 260 and 780, the boundary layer thickness—defined as the depth at which the normalized concentration has a value of 1/e—ranges between 800 and 250 m.

What is the Boundary layer?

• A boundary layer is the thin layer of fluid that forms immediately around a bounded surface in physics and fluid mechanics as a result of the fluid flowing along the surface.
• A no-slip boundary condition is created as a result of the fluid and wall interaction (zero velocity at the wall).
• After that, the flow velocity above the surface steadily rises until it reaches the bulk flow velocity again.
• The term "velocity boundary layer" refers to the thin layer of fluid whose velocity has not yet recovered to that of the main flow.

What purpose does a boundary layer serve?

• Because it is on the fluid's boundary, engineers refer to this layer as the boundary layer.
• Many aerodynamics issues, such as wing stall, skin friction drag on an object, and the heat transfer that takes place in high-speed flight, depend heavily on the specifics of the flow within the boundary layer.

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