Chinese Journal of Engineering / 2013 / Article / Tab 2

Research Article

Studying the Effect of Some Surfactants on Drag Reduction of Crude Oil Flow

Table 2

Relative roughness and length of pipes used.

Pipe inside diameter, mRelative roughness, ε/d Length of pipe with elbows, mLength of straight pipe, m

0.05080.0008854.6563
0.02540.0017702.3783
0.01910.0023621.6873

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