Magnus Definition and 34 Threads

Hello all, I came across a video I shot with my kids from when fidget spinners were popular (dating the clip). I thought it was an interesting shot likely showing the Magnus Effect that some of you may find interesting. We spun the fidget up with compressed air to a fairly ridiculous RPM and...

Ok I need to clear up a few things. First, in (Figure 1), a soccer ball (the circle in the photo), would have the magnus force towards the lower pressure because the universe favors high entropy? Also what are the forces are active in figure 2? Lastly what to the variables in Figure 3 mean...

Hello, I'm currently doing a school essay on the Magnus Effect, but I'm having a problem regarding a contradiction between my measurements and calculations. The experiment consists of letting go of rolled A4 paper cylinders on top of a ramp set on a table so that when the cylinder rolls down...

I have made a simulation of a table tennis ball being hit and landing on the table. There are 5 differential equations that are integrated to compute the horizontal position, horizontal velocity, vertical position, vertical speed and spin. by integrating 5 differential equations simultaneously...

I am trying to add to a problem of mine the viscosity parameter, simulating the fly of a ball. However I obtain the following equations d^2V_z/dt^2 = WdV_z/dt - dV_x/dt and d^2V_x/dt^2 = WdV_x/dt - dV_z/dt where W is a function linearly dependant to t. Any ideas how I could analytically solve...

Let's focus on obtaining how much will the ball deviate from a straight path and assume the spin of the ball to be ##11600## rpm and ##C_L = 0.4## to be the lift coefficient A pitcher is able to make a baseball follow a curved path by impinging spin on the ball (which triggers nonsymmetric...

Hello, My background is not fluid mechanics. Yet, I am trying, very late in life (near retirement) to understand some things, now that I have time. I have always been confused about the qualitative descriptions about the role of dimples on golf balls and fuzz on tennis balls. Sometimes, the...

what is s in this equation and how what equation do I need to figure out what S is Fm = S (w × v) Where: Fm =the Magnus force vector w= angular velocity vector of the object v=Velocity of the fluid (or velocity of object, depends on perspective) S= air resistance coefficient across the...

Hello, if i shoot a 6mm 0.3g bb down my 300mm barrel at 350 fps what is the maximum topspin i can give to the bb to make it touch the ground 50m away, if i shoot my gun at a 45° angle? Is the bb going to immediately touch the ground as soon as it go out of the barrel due to the magnus effect...

Hi I have been reading some internet articles that state the Bernoulli equation does NOT explain the Magnus Effect. The articles state that the effect is due to circulation (Bernoulli requires inviscid flows) Could someone explain the cause of the Magnus effect without reference Bernoulli's...

Hi. All technical implementations of the Magnus effect I can find on Google (such as ships) seem to use fairly smooth cylinders. Why? Shouldn't the efficiency increase with increasing friction between cylinder and fluid, for example with a rough surface or even attaching blades?

Hi PF! Given a hairdryer blowing vertically against gravity toward a ping pong ball the ping pong ball is suspended. The ball is relatively stable in the jet because the high velocity of the jet causes a decrease in pressure, causing the ambient air to mix, therefore keeping the ball in the jet...

Hi.i've been thinking about this thing lately...can i make a miniature that use magnus effect to move??

I am coding a game in which I desire a projectile to undergo realistic curving when rotating while moving through the air. Let's consider the instance of a projectile that is initially moving forward while spinning clockwise along an axis placed vertically in it is center of mass. The object...

So I've been investigating the magnus effect for I guess 2 weeks, but I've not been able to find a formula that would seem to be the correct formula. I did find some formula, but I have my doubts about the completeness/correctness of all of these formulas. Note that I am trying to simulate what...

I know that the surface roughness plays an role in the Magnus force exerted of a rotating cylinder. But, i cannot find an equation that includes the surface roughness in the equation of the Magnus force. If someone could state the formula (and preferably a source to read up more on it) it would...

Mr lee said: ↑ hi -new but enjoyed years, wit and wisdom Flettner rotor on a boat - ie. magnus effect Can the vertical rotor create lift? a curve balls 'laces' exaggerate and bend the magnus effect. can you replicate this effect on a rotor? --perhaps to enable another direction of force-- up...

1. Imagine a big river with water flowing constant velocity , assume there is a whirlpool at center as shown in the figure. 2. Because of the magnus force the whirlpool should move towards left or right towards river bank depending on the spin, but it does't happens it just stays fine in its...

does speed decrease MAGNUS EFFECT?

I am working on simulating the magnus effect of lift on a spinning ball. Right now spinning on the z axis I can calculate the force effect it has on the x and y coordinates. If I am to add spin on the x do I do the exact same calculations effecting the y and z coords and just add them to the z...

Hello, I am studying Magnus Effect for the first time, I would like some help here, please. The formula for Magnus effect as shown was: [F][/m] = S (v × ω) Where v = velocity of fluid, ω = angular velocity, S = air resistance coefficient across the surface of sphere. How can I...

I'm currently doing a project for my A-Level Physics group, and I have chosen to look into the Magnus Effect, however, I'm struggling to find an equation for it? Really need help here! Thank you!

I can't find authorative sources on whether the magnus effect works on the solar wind. I thought the solar wind was mostly particles, not a fluid medium, and therefore it would not. I thought this was the reason for the flat nature of solar sails. If the solar wind acted like a fluid medium...

Hello everyone, i have a question, please help me with equations for magnus force and drag force...i have found an equations for drag force it's, Fd=1/2 * density * v2 * A * Cd . but i can't find equation for magnus force...can anyone tell where i can find it, or if somebody know, let me know...

Hey everyone, I was researching the magnus force and came upon the equation being: Fm= S(w x v) where S is the air resistance coefficient and (w x v) is the cross product of the angular velocity and the velocity of the object. Well my question is that if the drag coefficient is...

Hey. I'm not great at physics, so apologies if I'm missing something obvious. This isn't homework, I'm just interested in the topic. I have a particle in 3d space and have an impulse applied to it. This impulse pushes the particle in the air and I have drag applied to it. Now, I'd like...

I was wondering which of these air resistance or magnus affect plays a role in the distance traveled by a ball more for a top spinning ball my thoughts would be that with both these effects the distance of the ball would travel less Please answer my question to satisfy my curiosity :D

I realize I may way out of my depth here... but i thought i'd jump in anyway. so that's the question...is there a specific formula? feel free to call me an idiot if I've got this all wrong :P Cheers Tony EDIT: sorry, i forgot a bit of background... so I'm doing a physics...

Hi, Is it right to assume that, since F = ma, that the magnus force has an impact on the acceleration of the spinning object, which in turn leads to a change in its velocity? I need to program an application that simulates a corner in soccer. This involves calculating the viscous and...

Homework Statement The time-evolution operator \hat{U}(t,t_0) for a time-dependent Hamiltonian can be expressed using a Magnus expansion, which can be written...

The air drag and magnus pass through spin axis? A ball is flying in the air, and it has spin on y axis, show below. F1 is the air drag force. F2 is the magnus force. My question is: the air drag and the magnus force is pass through the spin axis? Or, the ball will change the torque...

http://en.wikipedia.org/wiki/Magnus_effect Any one have an idea what to use for the gas (globe) of 1 mtr dia for a model of a Magnus effect lifter?

First of all I am trying to find a "derivation??" for the Magnus force that affects rotating cylinders and spheres passing moving through air. By derivation, if it is not correct, I mean a proof, something showing how the function was created. I have found the magnus force quite easily by...

For my article about long range artillery I was trying to calculate the magnus effect. I first neglected air friction (which is ridiculous because without air friciton there is no magnus effect). For the magnus effect of a cylinder I used the formula: F_{m}=2\pi \rho\ \omega v_{x}Lr^2...