When fires in fuel packages are near walls, from how many sides can they entrain air?

When fires in fuel packages are located near walls, they can entrain air from three sides due to the spatial arrangement of the package. Typically, a fuel package placed adjacent to a wall will have the wall obstructing one side, resulting in the fire being able to draw air from the opposite side and the two adjacent sides that are exposed.

The airflow dynamics around the fire are affected by the walls. The fire can use the ambient air available from the unblocked sides to support combustion. The two sides adjacent to the wall and the open side work together to facilitate the combustion process, allowing the fire to sustain itself and potentially grow more quickly due to the multimodal access to oxygen.

Understanding the airflow patterns and how fuel packages interact with their environment is crucial for predicting fire behavior, managing control strategies, and ensuring effective firefighting operations.