You may consider StreamPlot3D. VectorPlot3D, SliceVectorPlot3D.
StreamPlot3D
VectorPlot3D
SliceVectorPlot3D
Thanks for your comment
I will use 3D Vector Plot. I am straggling how to input triangle function as vector plot definition.
What is a triangle function?
Sorry I mean trigonometric functions.
To make polar anisotropic, I would like to change the direction by each position by using trigonometric function.
This is a way:
VectorPlot3D[RotationMatrix[Pi/3, {0, 0, 1}] . {x, y, z}, {x, -1, 1}, {y, -1, 1}, {z, -1, 1} ]