After integration along the canal with the length l0 between the two arbitrarily chosen sections 1-1 and 2-2, we obtain the following formula:
Considering the pressure drop variation between the initial section 1-1 and the final section 2-2 as:
we obtain the formula:
Similarly, as in the case of Dracy-Weisbach, the pressure drop can be characterised by the hydrodynamic friction coefficient (coefficient of linear losses):
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