N d represents the total number of potential drop in the complete flow net, then – Δh = head loss in the field, i.e., potential drop between two equipotential forming the field.ī x 1 = cross-sectional area of the field, considering 1 m length perpendicular to paper. Let b and L be the dimensions of the field and Δh be the head drop through this field.Īlso, let Δq represent the discharge passing through the flow channel, per unit length of structure (perpendicular to paper). 3 can be solved if the boundary conditions at the inlet and exit are known. Sometimes, the Laplace’s equation can be represented in terms of velocity potential ɸ, given by – The horizontal and vertical component of the hydraulic gradient are, respectively.Įquation (2) is the Laplace’s equation in terms of head h.
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