![]() The Hardy Cross method assumes that the flow going in and out of the system is known and that the pipe length, diameter, roughness and other key characteristics are also known or can be assumed.The method also assumes that the relation between flow rate and head loss is known, but the method does not require any particular relation to be used. Each method starts by maintaining either continuity of flow or potential, and then iteratively solves for the other. Hardy Cross developed two methods for solving flow networks. Conservation of potential means that the total directional head loss along any loop in the system is zero (assuming that a head loss counted against the flow is actually a head gain). The Hardy Cross method is an application of continuity of flow and continuity of potential to iteratively solve for flows in a pipe network.In the case of pipe flow, conservation of flow means that the flow in is equal to the flow out at each junction in the pipe. ![]()
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