To whom it may concern,
I am using the block model of Hydraulic Pipe with resistive and fluid compressibility properties. So far I understand, it takes into consideration losses through the paramenter (*)Aggregate equivalent length of local resistances. A fluid experiences pressure losses due to pipe geometry, changes in its cross sectional area, and change of direction. The Darcy-Weisbach equation for losses is Delta(p) = K (ρ/2) * v^2, where K is the loss coefficient. The loss coefficient can be then represented as K = f L/D, where f is the friction coefficient, L the length, and D the diamenter of the pipe.
So far I understood, the equivalent lenght was the ratio L/D, which is dimensionless. However, the paramenter (*) has a dimension of meters in Simulink. Therefore, I think I am misunderstanding something here. What does (*) truly represent? How can I use it in order to account for losses due to pipe length and bends?
I thank you very much in advance for your help!