Ideal flow past a cylinder
A uniform stream past a circular cylinder in a fluid with no viscosity. The solution is exact and closed-form: streamlines part at a stagnation point, run round the surface and close up perfectly behind, and the pressure recovers to exactly what it was in front.
33 essays call
ideal-cylinder. The drawing above is what it returns with no arguments at all; every
call below passes it something, because a placement that passes nothing draws whichever member
of the family the generator happens to default to rather than the one its essay argues about.
It is also the blast radius. Changing ideal-cylinder changes every figure listed here
at once, and on this site it may change what they assert as well as what they show —
which is what has to be rebuilt and looked at before the change is believed.
Where it is called
What each of these essays asks for instead of the defaults is on the regime index, which reads the parameters back out of the finished figures rather than out of the placements.
- The story about air meeting up again What is taught wrongly
- Streamlines are not the paths particles take Flows and fields
- The theory that solves everything Ideal flow
- Everything happens in a layer you cannot see Viscosity
- What actually holds a wing up Circulation and lift
- The exact theory says nothing has any drag Ideal flow
- Flows add up Ideal flow
- The two theories, side by side Viscosity
- What a flow is Flows and fields
- When air stops being incompressible Regimes and numbers
- Lift with no wing at all Circulation and lift
- Fast means low pressure Ideal flow
- Steady does not mean nothing is happening Flows and fields
- What a photograph of a flow shows What is taught wrongly
- One function instead of two Ideal flow
- Bodies made out of nothing Ideal flow
- How much uphill a layer can take Viscosity
- A wall made by reflection Ideal flow
- How much circulation is too much Circulation and lift
- A ball that swings without spinning Fluids at work
- The number that does not depend on the tunnel Ideal flow
- The force of getting going Ideal flow
- Vortices move each other Ideal flow
- Nothing but the edge Circulation and lift
- Where the reaction to a wing's lift is Ideal flow
- The mirror that is a circle Ideal flow
- The drop that is not a tear Regimes and numbers
- Drag in the theory that forbids it Ideal flow
- The exact theory, drawn by viscosity Ideal flow
- A finite force from an infinite speed Circulation and lift
- The one thing that does not add up Ideal flow
- Nothing in the present picks the flow Ideal flow
- The theory with no memory in it Ideal flow