StreamPlot3D

StreamPlot3D[{vx, vy, vz}, {x, xmin, xmax}, {y, ymin, ymax}, {z, zmin, zmax}] plots streamlines for the 3D vector field {vx, vy, vz} as functions of x, y and z.

StreamPlot3D[{vx, vy, vz}, {x, y, z} ∈ reg] takes the variables to be in the geometric region reg.

Examples

Plot 3D streamlines:

StreamPlot3D[{-y, x, 0}, {x, -2, 2}, {y, -2, 2}, {z, -2, 2}]

Helical flow:

StreamPlot3D[{-y, x, 1}, {x, -2, 2}, {y, -2, 2}, {z, -2, 2}]

Please visit the official Wolfram Language Reference for more details.