Boundary layer detaches under adverse pressure gradient causing stall and wake.
Under adverse pressure gradients, the boundary layer slows near the wall and detaches, forming a wake with high pressure drag. Golf-ball dimples trip turbulence to delay separation. On wings it causes stall; vortex generators and slats mitigate it.
A stalled wing loses lift abruptly at high angle of attack.
Flow separation causes stall, high drag and vibration, so keeping flow attached is a central goal of aerodynamic and hydraulic design.
Boundary layer detaches under adverse pressure gradient causing stall and wake.
Flow separation causes stall, high drag and vibration, so keeping flow attached is a central goal of aerodynamic and hydraulic design.
An adverse pressure gradient slows the boundary layer near the wall until it reverses and detaches from the surface.
Vortex generators, slats, flaps and smooth shapes keep the flow attached and delay separation.
Typical applications include explaining why an aircraft wing stalls at high angle of attack, designing a diffuser that avoids separation and loss and locating the separation point on a bluff body such as a cylinder.
Study "Drag and lift" first (topic 71 of 105 in Thermodynamics & Fluids). It covers the groundwork this topic builds on.
Separation point. Wake size. Reattachment.
A stalled wing loses lift abruptly at high angle of attack.
The next topic is "Airfoil aerodynamics", which builds directly on this one.
It is classed as Advanced in Thermodynamics & Fluids (topic 72 of 105). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Thermodynamics & Fluids.
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