[warlocklw]

We know the more viscosity the fluid has, the less it will be deformed by outer force.
Eg. Mercury has more viscosity than blood, and blood has more viscosity than water.

However, Reynold Number is a dimensionless number. More Reynold Number will yield what effect on a fluid?

[truffaldino]

Reynold number is a ratio between viscous forces in your system and "inertial forces", this is what only matters in NS equation: flow with bigger momentum in the high viscousity fluid has same effect as flow with smaller momentum in a low viscousity system.

[aero_suresh]

Originally Posted by warlocklw

We know the more viscosity the fluid has, the less it will be deformed by outer force.
Eg. Mercury has more viscosity than blood, and blood has more viscosity than water.

However, Reynold Number is a dimensionless number. More Reynold Number will yield what effect on a fluid?

As Re increases, it means that the Inertial force effects/influence is more for a particular type of fluid medium (viscosity = constant).