By filming the movement of coloured water through a scale model, the researchers tracked the airflow through the building.
'Our tests highlighted a problem. On hot summer days the ventilation system didn't work - there was the possibility of overheating because the air was cooler inside than outside so it wouldn't rise through the stacks.' Andrew Woods, fluid-flow scientist, BP Institute, Cambridge
Cool air comes in through the atrium and warm air exits through the stacks. Lotty Gladstone and Andrew Woods, BP Institute, Cambridge Broadband Version
