Titlebook: Computational Methods in Environmental Fluid Mechanics; Olaf Kolditz Textbook 2002 Springer-Verlag Berlin Heidelberg 2002 Computational Me

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1.2.6.3 The length of the day (l. o. d.),vatives in spatial coordinates and first order derivatives in time. Whereas time derivatives appear linearly, spatial derivatives often have a non-linear form. Frequently, systems of partial differential equations occur rather than a single equation.