The velocity field, arrows to scale
The same flow drawn as arrows. Scaled to the local speed the picture is honest and crowded; drawn all the same length it is legible and hides the very variation the figure is about.
21 essays call
velocity-field. 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 velocity-field 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.
- Streamlines are not the paths particles take Flows and fields
- The most a disc can take Fluids at work
- A big slow push Fluids at work
- Mass has nowhere to go Flows and fields
- Flows add up Ideal flow
- What a flow is Flows and fields
- The duct that works backwards Compressible flow
- Steady does not mean nothing is happening Flows and fields
- What a photograph of a flow shows What is taught wrongly
- Spin is not the same as going round Flows and fields
- The number on a streamline is a flow rate Flows and fields
- Circulation is vorticity, added up Flows and fields
- What a parcel does in the first instant Flows and fields
- How far a parcel gets Transition and turbulence
- Inviscid does not mean irrotational Ideal flow
- A scalar is a record of where its fluid was Flows and fields
- How long the fluid has been in there Flows and fields
- The line the dye actually draws Flows and fields
- The curve that measures a gradient Flows and fields
- A wave on the wall is a pump Flows and fields
- The pump that is better the more it squeezes Flows and fields