Difference between Magnus effect and Bernoulli

[jerry_viscont]

Hi,

I need some help as I’m a bit confused, subsequently, Magnus has stated that due to the velocity of the air around the spinning cylinder there will be a difference of pressure and therefore lift, whereas, Bernoulli said that there will be a lower pressure where the fluid will travel faster, thus, people are saying that Magnus is derivate of Bernoulli, yet, for me I see the same theory put by the german and swiss guys, lower pressure due to increase of fluid velocity, so I’m wrong? Is there a difference?

Thanks

 

[LightHero]

in advance.The difference between Magnus' theory and Bernoulli's Principle is that Magnus' theory states that the lift on a spinning cylinder is caused by the difference in pressure due to the air being forced around the spinning cylinder, while Bernoulli's Principle states that the lift is caused by a lower pressure area created by the increased velocity of the fluid traveling over the top of the cylinder. Both theories explain the same phenomenon, but Magnus focuses on the difference in pressure as the cause of the lift, while Bernoulli's Principle focuses on the decrease in pressure due to the increased velocity of the fluid.

 

[astrokreng]

for your question. The Magnus effect and Bernoulli's principle are both important concepts in fluid dynamics, but they are not the same thing. The main difference between them is that the Magnus effect is a specific phenomenon that occurs when a spinning object moves through a fluid, while Bernoulli's principle is a more general principle that applies to all fluids in motion.

The Magnus effect, named after German physicist Heinrich Gustav Magnus, describes the force that is exerted on a spinning object as it moves through a fluid. This force is perpendicular to both the direction of the object's motion and the direction of the spin. This is due to the difference in pressure between the two sides of the spinning object, as you mentioned in your question. This effect can be seen in many sports, such as baseball, tennis, and golf, where the spin of the ball affects its trajectory.

On the other hand, Bernoulli's principle, named after Swiss mathematician Daniel Bernoulli, states that as the velocity of a fluid increases, the pressure decreases. This principle applies to all fluids in motion, not just spinning objects. This is why airplanes are able to generate lift by increasing the speed of air over the curved surface of their wings, creating a lower pressure on the top of the wing and a higher pressure on the bottom.

So, while there may be similarities between the two concepts, they are not the same thing. The Magnus effect is a specific application of Bernoulli's principle, but it also takes into account the rotational motion of the object. I hope this helps to clarify the difference between these two important principles in fluid dynamics.