By Jochen Kämpf
This publication introduces the reader to complicated equipment utilized in the computer-based modelling of fluid techniques. This contains nonhydrostatic techniques comparable to breaking inner waves and density-driven convection, however the version code is additionally used to simulate an El-Niño occasion! The booklet includes 25 functional routines, utilizing freely on hand Open-Source software program suites, that are popular by way of the medical group. during this e-book, the paintings of hydrodynamic modelling is made to be had and obvious to a much wider readership. an enticing byproduct of the publication is that effects are animations instead of nonetheless photos. version codes and animation scripts for all workouts are provided on an internet site. The reader can undertake version codes for personal self sustaining studies
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Extra info for Advanced Ocean Modelling: Using Open-Source Software
Conduct a sequence of experiments with total water depth h varying between 20 and 200 m. For which value of h do the surface and bottom Ekman layers appear as separate features without overlapping? The reader is also encouraged to simulate Ekman-layer dynamics for the Southern-Hemisphere situation. Chapter 3 Basics of Nonhydrostatic Modelling Abstract This chapter introduces the reader to nonhydrostatic finite-difference solvers of the Navier-Stokes equations. For a start, the ocean is treated as as vertical slice.
Consequently, vertical velocity inherent with internal waves has to vanish at the sea floor and it has to become very small at the sea surface. Since the resultant waves can only propagate horizontally, the vertical boundaries operate as a waveguide. Only a discrete set of wave solutions, so-called normal modes, satisfies the conditions of vanishing vertical velocity at vertical boundaries. 5nλ/ h)2 where n = 1, 2, 3, · · · is the mode number, λ is horizontal wavelength, and h is total water depth.
The reader is encouraged to use a finer spatial resolution for more accurate results. This task employs the rigid-lid version of the vertical ocean-slice model. The total simulation time is 100 min with outputs every minute. The time step is set to Δt = 1 s. R. iteration is set to = 1 × 10−3 Pa. Will the model adequately simulate vertical mixing inherent with the KelvinHelmholtz instability mechanism? 3 Cyclic Boundary Conditions Cyclic boundary conditions mean that opposite lateral boundaries are connected with each other, such that flow escaping through one boundary enters through the opposite one.
Advanced Ocean Modelling: Using Open-Source Software by Jochen Kämpf