Reyn

This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.

Physical unit
Unit name	Reyn
Unit symbol	${\displaystyle \mathrm {Reyn} }$
Physical quantity (s)	dynamic viscosity
Formula symbol	${\displaystyle \eta }$
dimension	${\displaystyle {\mathsf {M\;L^{-1}\;T^{-1}}}}$
system	Anglo-American system of measurement
In SI units	${\displaystyle \mathrm {1\,Reyn=6.894{,}76\;Pa\,s} }$
Named after	Osborne Reynolds
Derived from	Pound-force per square inch , second

The Reyn was a unit of dynamic viscosity that was mainly used in Anglophone countries. It was named after the British physicist Osborne Reynolds . Today, the term psi-second is widely used instead . Psi is the abbreviation for pound-force per square inch .

1 Reyn = 1 psi-second (lb.sec / in²) = 68,947 Poise = 6894.76 Pascal-seconds (Pas)