In: Civil Engineering
Common data
g = 9.81 m/s².
The standard properties of water are density:
ϱH2O=1kg/dm3ϱH2O=1kg/dm3 exactly, kinematic viscosity:
νH2O=1.02⋅10−6m2/sνH2O=1.02⋅10−6m2/s.
Lubrication oil is pumped at a rate of 30.5 cm³/s through a 13 m long D = 7.5 mm diameter pipe on a steam engine. The pipe roughness is ε = 1.5 µm. The density of the lubricating oil is 960 kg/m³, its dynamic viscosity at 25 °C is 4 Pa·s.
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As the temperature rises to 95 °C, the dynamic viscosity drops by a factor of 100. How does this change the flow type and the required power?