Fluid mechanics research related to fire is reviewed with a focus on canoni
cal flows, multiphysics coupling aspects, and experimental and numerical te
chniques. Fire is a low-speed, chemically reacting flow in which buoyancy p
lays an important role. Fire research has focused on two canonical flows, t
he reacting boundary layer and the reacting free plume. There is rich, mult
ilateral, bidirectional coupling among fluid mechanics and scalar transport
, combustion, and radiation. There is only a limited experimental fluid mec
hanics database for fire owing to measurement difficulties in the harsh env
ironment and to the focus within the fire community on thermal/chemical con
sequences. Increasingly, computational fluid dynamics techniques are being
used to provide engineering guidance on thermal/chemical consequences and t
o study fire phenomenology.