Beijing-based artist Zheng Lu’s signature steel sculptures feature lassoing splashes of water that allude to a person’s changing inner states; Zheng’s new work at Chelsea’s Sundaram Tagore Gallery introduces more abstracted forms inspired by the natural world, including this piece titled ‘Colosseum,’ a stainless-steel whirlpool which visitors can enter. Viewed from the outside, ‘Colosseum’ allows viewers to observe the scale and consequence of the swirling vortex on one who may be inside. In Chinese poetry, water has long pointed to a person’s inner state; here, Zheng suggests dramatic workings of the mind. (On view through July 12th).