StreamDensityPlot

StreamDensityPlot[{{vx, vy}, r}, {x, xmin, xmax}, {y, ymin, ymax}] generates stream lines superimposed on a density plot of scalar field r.

Examples

Stream with density background:

StreamDensityPlot[{{-y, x}, x^2 + y^2}, {x, -2, 2}, {y, -2, 2}]

Using vector magnitude:

StreamDensityPlot[{-y, x}, {x, -2, 2}, {y, -2, 2}]

Please visit the official Wolfram Language Reference for more details.