Transcript Liquid Viscosity

Liquid Viscosity
Intro. To Engineering Project
Team #9
Nov 02, 2004
Principle of Operation
- Steven Sallee (Team Leader)
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The cylinder is raised and
held in position.
The cylinder falls and its
weight is the force of its
velocity.
The liquid near the surface
of the cylinder has the same
velocity of the cylinder and
moves down.
The liquid near the container
has the velocity in the
opposite direction.
Record the time between
the cylinder reaching
constant velocity and hitting
the bottom.
The time of fall is directly
proportional to the viscosity.
Mathematical approach
– Jeremy Banta
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F/A = u V/D
F = W = mg
A = 2πrh
U is the constant
V is the velocity
D = d/2
V = FD/Au
Viscosity is N sec/mm2
Material and Equipment
– John Leyva
• Three cylinders made by aluminum,
steel and iron all with r = 50 mm.
• One round metal container r = 51 mm.
One 20x20 mm outer container.
• One cylinder holder with r=50.5mm
• One sec stopwatch, one thermometer,
one ruler, one cup, 3 type of fluid: water,
mercury and engine oil.
• Total cost estimate: $160
Test Method and Condition
- John Leke
• Room
temperature 20ºC
• Use 3 cylinders to
test same fluid,
calculate each
viscosity. Average
3 viscosities and
put in chart.
• Test all 3 fluids
and compare the
result in table.
Conclusion
- JingWen Liu
• In the same test condition, engine oil has more
viscosity than water and mercury. Viscosity is a
measure of a fluid’s resistance to flow. The
greater the viscosity (engine oil), the more
slowly the liquid flows.
• The test accuracy is limited by assuming the
cylinder surface condition is the same, ignoring
the bottom of the cylinder resistance and
measuring the resistance of the liquid being
pushed out of the opening.
• The design is for laboratory test only.
• Thanks to the Norcross Corp. For production
detail: www.viscosity.com
The End