For the flow calculation, the full Navier-Stokes equations in x-, y- and z-direction are used. The enormous demand for computing capacity is the main limiting factor. 3-dimensional models: 3D-hn-models find their use in small-scale calculation fields, as for flow around structures or at intake structures of hydroelectric power stations, where the mapping of possible vortices and the knowledge of all three velocity components is important.This leads to models with different advantages and disadvantages: Depending on the objectives and dimensional resolution of the required modelling outcomes - especially the water level and flow velocity - the basic equations can be simplified in various ways, without significantly limiting their validity. ![]() ![]() ![]() The movement of flood waters through the landscape can be approximated using many different methods. Planning of Stormwater Treatment PlantsġD, 2D and 3D hn-models: advantages and disadvantages.
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