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Dynamic Viscosity Converter

You can see viscosity as the resistance. When the resistance gets higher, the viscosity get greater with it. The unit of dynamic viscosity is the Poiseuille (=Pa·s). When you know the viscosity, you can amongst others calculate the number of Reynolds. With that you know whether the stream is turbulent or not. A turbulent stream is a stream where the velocity of the particles have random directions. When the stream is not turbulent (laminar), the velocity and direction of the particles is always the same. If you know the number of Reynolds, you can calculate the pressure in a pipe line.

signification:

   
metric   GB & USA  
Poiseuille (Pa·s) lbf·s/inch2
Poise (dyne·s/cm2 = g/cm·s) lbf·s/ft2
centiPoise lbf·h/ft2
kg/m·h lb/ft·s
kgf·s/m2 lb/ft·h


Calculation of Reynolds:

Re = r. v.D/h.

r = density (kg/m3) =

v = speed (m/s) =

D = diameter (m) =

h = dynamic viscosity (Pa·s) =

The Reynolds number is: This is

Now you can calculate the pressure. You need to know the length (in meters) of the pipe. This is m. You also need the friction e: .

The pressure is about: Pa. This is with a pipe that is straight.


Convert the units from the American metric system to the British metric system and the standard metric system (SI).


Here are some geometrical bodies, whose volume can be calculated. These are pyramid, truncated pyramid, cylinder, hollow cylinder (pipe), cone, truncated cone, sphere, the segment of a sphere and a barrel. You will have to be consequent with the units. So, if you want the volume in cubic meters, you will have to fill in all the data in meters. If you don't, the calculations will be wrong.


 

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