In data center hot aisle containment, a baffle is anything that disturbs the flow of air through a room, rack or system. A baffle changes the course of airflow or re-directs it. Baffles also send cooled air to the airflow panels in the cold aisle and minimizeairflow corridors in the raised floor.
In a server, however, and in rack-mounted servers, a single row of fans may operate to create an airflow through the chassis from front to rear, which is directed by passive ducts or shroudsacross individual components' heat sinks.
Figure 1: A sample representation of an Airflow Baffle