Flame Contact

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Wildfire Knowledge Graph · Heat Transfer

Working definition

Direct impingement of flame on a receptor surface, creating a thermal exposure pathway distinct from radiation alone.

Also searched as

direct flame impingement

In plain language

Direct impingement of flame on a receptor surface, creating a thermal exposure pathway distinct from radiation alone.

Why it matters

Flame Contact is useful because it separates one specific part of wildfire behaviour, exposure, operations or evidence from nearby concepts that can otherwise be mixed together.

What is flame contact?

Flame contact occurs when visible flame physically impinges on a target surface. In wildfire exposure analysis, that target may be vegetation, a fence, siding, a deck, a vehicle or another combustible element.

Flame contact vs radiant heat

Flame contact requires the flame itself to reach the target. Radiant heat can transfer energy across a gap without physical contact, so the two pathways should not be treated as equivalent.

Flame contact vs ember attack

Ember attack can ignite receptive material ahead of the flame front. A building can therefore ignite from embers without direct flame contact, or experience several exposure pathways during the same incident.

Separating these mechanisms is useful in post-fire reconstruction and home-hardening analysis because “the fire reached the structure” does not by itself identify the actual ignition pathway.