I am trying to solve a parallel piping system (sizing problem). I need to find the diameter of each branch pipe. I am using a Darcy Head Loss Equation for Iterative solution. I have flowrate, Length, viscosity and density. I will guess the friction factor and continue my iteration but problem is i am not provided with the head loss (hf).
please tell me how can i calculate the head loss (hf) value. Problem sketch and statement is also attached.
Thanks in Advance !