### Formula

Re

Reynolds number

rho

density of the fluid

Dh

hydraulic diameter of the pipe

v

the mean velocity of the object relative to the fluid

mu

the dynamic viscosity of the fluid

Re

Reynolds number

rho

density of the fluid

Dh

hydraulic diameter of the pipe

v

the mean velocity of the object relative to the fluid

mu

the dynamic viscosity of the fluid

In general, in any flow, layers move at different velocities and the fluid\'s viscosity arises from the shear stress between the layers that ultimately oppose any applied force.

rho

Dh

v

mu

Re

Precision

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