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Unformatted text preview: between plate & fluid or between 2 layers of fluid If the velocity gradient is constant the fluid is called a Newtonian fluid where the constant of proportionality (µ) = dynamic viscosity 25°
Dynamic Viscosity of Common Fluids (at 25°C) Viscosity Fluid
µ= [M ] =
[LT ] Ns
m2 ν= 0.890 x 10-3 ethanol 1.074 x 10-3 olive oil 81 x 10-3 pitch (tar) 2.3 x 108 = cP Kinematic
where cSt = centistokes
(Stokes = 1 cm2.s−1) acetone Dynamic Viscosity
0.306 x 10-3 water Dynamic
where cP = centipoise
(Poise = 1 g cm-1 s-1) Newtonian fluids & Non-Newtonian fluids are both Non-Ideal fluids µ
ρ • Varies greatly between different liquids
• Varies moderately with temperature, depending on the liquid •2 Viscosity of water at different
temperatures READING FOR NEXT LECTURE:
Pages: 113-122 in Fetter •3...
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This note was uploaded on 11/10/2011 for the course GEOL 455 taught by Professor Perfect during the Fall '11 term at University of Tennessee.
- Fall '11