Plumes (IMAGE) Brown University Caption Turbulent heat exchangers use fluid dynamics to move heat. Plumes of warmer water rise from a hot bottom surface to a cold upper surface, where they lose their heat and sink back to the bottom. A new study shows that adding a small amount of a liquid additive to a water-based heat exchanger can speed the motion of the plumes and increase heat exchange capacity. Credit Chao Sun Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.