For best of web I chose this a highly detailed picture of an abstract acrylic painting by the artist Mark Chadwick. On his Flickr page there are more shots of different paintings he has done, each with their own unique flow pattern. I think that paint is a really unique medium for showing flow patterns because all the colors stand out and you can see how the colors move with each other. This particular painting reminds me of a tributary flowing out into the sea, which is amazing that this paint can emulate something that actually occurs in nature. I highly recommend checking out the rest of his work because the designs and patterns that he creates are insanely beautiful and all very different.

credit: https://www.flickr.com/photos/markchadwick/6382451213