How Do Vortices Form in Fluid Dynamics? - Physics Forums I’ve been reading about the Kutta Condition and how a vortex results but the information discussing how vortices form aren’t too detailed I’m just interested to know more about them My favorite book on the subject is Saffman's "Vortex Dynamics"
Formation of Vortices: Reasons Physical Phenomena - Physics Forums 1 Can anyone please explain in detail How a Vortex if formed I mean what are the reasons and physical phenomena that cause the water entering a bath tub sink to gain a CIRCULAR ROTATIONAL motion and form a Vortex How do the water molecules otherwise traveling straight towards the sink
Are closed streamlines necessary to have vortices? The term 'vortices' used in you EDIT may be interpreted as sub-domains in the flow field where there is non-zero vorticity (i e rotationality) The flow itself may or may not be in circular paths I hope this post clears the difference between vortex-flows, vorticity and vortices (Reference: Fluid Mechanics Kundu and Cohen, 4th Edition)
fluid dynamics - Why do quantum vortices form in superfluids . . . The superfluid can be in a state with zero vortices But if one imparts angular momentum to the superfluid, then the angular momentum is physically expressed either by the superfluid rotating as a whole, or by the presence of vortices In an ordinary fluid vortices can also appear of course, but they get damped away by viscosity
Why are vortices stable? - Physics Stack Exchange Vortices persist over time, but change their shape I am used to a structure that persists being “stable” as in it is robust against small perturbations How can one define stability of a Vortex? For example how could one prove that the bathtub vortex is stable? What does it even mean for it to be stable if it’s shape changes?
What causes the formation of vortices in a separated flow? Also, I have heard that an inflection point in the velocity profile leads to instability in the flow (i e the flow is unstable to random disturbances) which leads to the production of vortices at higher Re So my question can be split into 2 parts: 1) Why does the velocity gradient lead to vortex formation in the separated flow over a cylinder?
Why does the vortex form in the von Karman Vortex Street? It is known that the interaction between the vortex shedding and the mean wake is nonlinear, in the sense that the most unstable mode of the initial steady wake initiates the instability, but then as the vortices grow they alter the mean flow, which changes the most unstable mode, etc , until a saturation point is reached
How do the vortices in vortex-induced vibrations (VIV) form? The "pressure mountain" (the standing vortices) behind the cylinder hinders the particles to proceed, slows them down and even reverses their macroscopic motion This leads to ternary vortices (pointing away from the cylinder) on either side of the cylinder and due to some asymmetric perturbation in velocity this would wash one of the vortices
How does a shear layer make vortices? - Physics Stack Exchange How does a shear layer make vortices? If you have 2 streams of air that are moving at different speeds or opposite directions right beside each other, how does that make a vortex? What causes the rotation, in other words
About solitons, what is the difference between kinks and vortices? A soliton is a localized, non-dispersive solution of a nonlinear theory in Euclidean space It certainly is a real object: you have a famous story about a certain John Russell who observed soliton-like waves made by a boat on a river (wikipedia knows everything about it!)