In fluid dynamics, the reyn is a British unit of dynamic viscosity, named in honour of Osbourne Reynolds, for whom the Reynolds number is also named.Juvinal, Robert C. & Marshek, Kurt M.; Fundamentals of machine component design. 2nd ed., 1991, pp. 480,
Conversions By definition, 1 reyn = 1 lbf s in−2. It follows that the relation between the reyn and the poise is approximately 1 reyn = 6.89476 × 104 P.
In SI units, viscosity is expressed in newton-seconds per square meter, or equivalently in pascal-seconds. The conversion factor between the two is approximately 1 reyn = 6894.76 Pa s.
References
External links Reyn History of the unit