fanning friction factor造句

• It is related to the more widespread Fanning friction factor by
• Accordingly, the relationship between the friction head and the Fanning friction factor is:
• Assuming the Fanning friction factor is a constant along the duct wall, the differential equation can be solved easily.
• Of the two, the Fanning friction factor is the more commonly used by chemical engineers and those following the British convention.
• In which \ rho is the density of air in the shaft or roadway under consideration and f is Fanning friction factor ( dimensionless ).
• One must keep in mind, however, that the value of the Fanning friction factor can be difficult to determine for supersonic and especially hypersonic flow velocities.
• For the turbulent flow regime, the relationship between the Fanning friction factor and the Reynolds number is more complex and is governed by the Colebrook equation which is implicit in f:
• The Darcy Weisbach Formula f _ D is 4 times the Fanning friction factor f and so a factor of \ frac { 1 } { 4 } has been applied to produce the formula given below.
• The Darcy friction factor is also known as the " Darcy Weisbach friction factor ", " resistance coefficient " or simply " friction factor "; by definition it is four times larger than the Fanning friction factor.
• For heat transfer, where " Nu " is the Nusselt number, " Re " is the standard Reynolds number based on the inner diameter of the tube, " Re "'is the specific Reynolds number based on the wiping frequency, " Pr " is the Prandtl number, " Fa " is the Fanning friction factor, " L " is the length of the tube, " D " is the inner diameter of the tube, " n " is the number of blades and the dots account for any other relevant dimensionless parameters.