large clear tank of water with a powerful vortex forming in the center

large clear tank of water with a powerful vortex forming in the center. The water is a greenish color, and swirling motions are clearly visible as the vortex intensifies. The tank's edges are visible, showing a smooth, possibly acrylic, material. Above the tank, there are indistinct background elements, possibly lights and architectural details, suggesting an indoor setting such as a museum or science center. There's no direct human interaction visible, but the presence of the tank in a public setting implies observation or demonstration of the water phenomenon. The lighting appears to be coming from above, with some glare on the water surface.