Experimental study of velocity fields in a human nasal fossa by laser anemometry

Velocity fields for various cross sections of a model of a normal human nasal fossa were determined by laser anemometry, a dynamic, quantitative and non-invasive technique. Velocity fields showed, in the laboratory, the very definite influence of the irregular architecture of the fossa on the characteristics of flow namely the streamlining action of the turbinates, the directional effect of the liminal valve and the greater velocity near the floor and the septum. They also allow a more precise evaluation of the flow mode than the Reynolds number. The aerodynamic effects of certain non-obstructive deformities were discussed.