- #1
kthouz
- 193
- 0
in the surface tension about the pressure excess notion i have problem: why for a full dropplet of water the formula is p=2T/r whereas for a bubble p=4T/r. Why does it be multiplied by 2.
The pressure excess notion is a concept used in fluid mechanics to describe the pressure exerted by a fluid on a surface. It is based on the idea that the pressure at any given point is equal to the sum of the static pressure and the dynamic pressure.
The formula for pressure excess is multiplied by 2 because it takes into account both the static and dynamic pressures. By multiplying the formula by 2, it allows for a more accurate calculation of the total pressure exerted by a fluid on a surface.
Static pressure is the force exerted by a fluid on a surface due to the weight of the fluid itself. Dynamic pressure, on the other hand, is the force exerted by a fluid on a surface due to its motion or velocity. Both static and dynamic pressures are important in calculating the total pressure exerted by a fluid on a surface.
The pressure excess notion is used in many real-world applications, such as in the design of aircraft wings and car aerodynamics. It is also used in the design of pipes and pumps in plumbing systems, as well as in the study of ocean currents and weather patterns.
While the pressure excess notion is a useful concept in fluid mechanics, it does have some limitations. It assumes that the fluid is incompressible and inviscid, which may not always be the case in real-world scenarios. Additionally, it does not take into account factors such as turbulence or boundary effects, which can affect the accuracy of calculations.