What type of burn pattern is characterized by the upward and outward spread of flames?

The upward and outward spread of flames is best represented by a V-pattern. This pattern occurs when the fire originates from a specific point and then spreads upward and outward, creating a V shape on the surfaces where the heat and flames have impacted the surrounding materials.

In forensic fire investigations, identifying burn patterns like the V-pattern helps to determine the point of origin of a fire. The shape of the V indicates the direction of the heat and the flame spread, making it a critical element in understanding the dynamics of the fire. This pattern is commonly observed when a fire moves vertically along walls or ceilings, illustrating how flames typically rise and spread in a triangular configuration.

The other patterns mentioned relate to different types of spread or movement of flames and heat but do not describe the specific upward and outward burning characteristic associated with the V-pattern.