The name of the principle is the equation of continuity (or the principle of mass conservation).DeBruyn said:Hello,
I was looking for the name of the principle which governs the following-
given a constant air flow- air moves faster through a tube with a smaller diameter than a tube with a larger diameter.
Sure!Wouldn't you like to know what this has to do with singing?
Doc Al said:The name of the principle is the equation of continuity (or the principle of mass conservation).
The conservation of mass leads, for an incompressible fluid, to the equation of continuity: the volume flow rate must be constant at all points in an air stream. The volume flow rate is given by Volume/time = Area x Speed. Thus, for a given flow rate, air will flow faster through a tube with smaller diameter.