Pressure drag results toa)formation of wakeb)turbulence of the wakec)e...
- Drag is defined as a forceful pull experienced by the flat plate while the fluid flows over it.
- Pressure drag comes from the eddying motions that are set up in the fluid by the passage of the body. This drag is associated with the formation of a wake, which can be readily seen behind a passing boat, and it is usually less sensitive to the Reynolds number than the frictional drag. It depends on the shape of the body.
- Frictional drag comes from friction between the fluid and the surfaces over which it is flowing.
Pressure drag results toa)formation of wakeb)turbulence of the wakec)e...
Pressure drag results to:
Pressure drag is a type of drag force that occurs when a solid object moves through a fluid medium, such as air or water. It is caused by the pressure difference between the front and back of the object, leading to various effects:
Formation of wake:
When an object moves through a fluid, the pressure difference around the object creates a wake behind it. This wake is a region of disturbed flow characterized by vortices and turbulence. The formation of wake is a direct result of pressure drag acting on the object.
Turbulence of the wake:
The wake generated by pressure drag tends to be turbulent due to the complex flow patterns and vortices formed in this region. Turbulence in the wake can increase drag force on the object, further contributing to the overall pressure drag.
Existence of stagnation point in front of a body:
Pressure drag also leads to the existence of a stagnation point in front of the body. This stagnation point is where the fluid comes to a stop and the pressure is at its maximum. The flow then separates from the object and creates the pressure difference responsible for pressure drag.
High Reynolds number:
Pressure drag is more prominent at higher Reynolds numbers, which indicate the ratio of inertial forces to viscous forces in the flow. As Reynolds number increases, the effects of pressure drag become more significant, leading to greater drag forces on the object.
In summary, pressure drag results in the formation of wake, turbulence in the wake, the existence of a stagnation point in front of the body, and is more pronounced at high Reynolds numbers. Understanding these effects is crucial in the design and analysis of objects moving through fluid mediums.
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