Changeset 11596 for NEMO/trunk/doc/latex/NEMO/subfiles/apdx_algos.tex
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- 2019-09-25T19:06:37+02:00 (5 years ago)
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NEMO/trunk/doc/latex/NEMO/subfiles/apdx_algos.tex
r11584 r11596 2 2 3 3 \begin{document} 4 % ================================================================5 % Appendix E : Note on some algorithms6 % ================================================================7 4 \chapter{Note on some algorithms} 8 5 \label{apdx:ALGOS} … … 10 7 \chaptertoc 11 8 12 \newpage13 14 9 This appendix some on going consideration on algorithms used or planned to be used in \NEMO. 15 10 16 % -------------------------------------------------------------------------------------------------------------17 % UBS scheme18 % -------------------------------------------------------------------------------------------------------------19 11 \section{Upstream Biased Scheme (UBS) (\protect\np[=.true.]{ln_traadv_ubs}{ln\_traadv\_ubs})} 20 12 \label{sec:ALGOS_tra_adv_ubs} … … 188 180 which leads to ${A_u^{lT}} = \frac{1}{12} {e_{1u}}^3\ |u|$ 189 181 190 % -------------------------------------------------------------------------------------------------------------191 % Leap-Frog energetic192 % -------------------------------------------------------------------------------------------------------------193 182 \section{Leapfrog energetic} 194 183 \label{sec:ALGOS_LF} … … 244 233 In time this boundary condition is not physical and \textbf{add something here!!!} 245 234 246 % ================================================================247 % Iso-neutral diffusion :248 % ================================================================249 250 235 \section{Lateral diffusion operator} 251 236 252 % ================================================================253 % Griffies' iso-neutral diffusion operator :254 % ================================================================255 237 \subsection{Griffies iso-neutral diffusion operator} 256 238 … … 305 287 the presence of partial cell at the ocean bottom (see \autoref{subsec:ALGOS_Gf_operator}). 306 288 307 %>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>308 289 \begin{figure}[!ht] 309 290 \centering … … 315 296 \label{fig:ALGOS_ISO_triad} 316 297 \end{figure} 317 %>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>318 298 319 299 The four iso-neutral fluxes associated with the triads are defined at $T$-point. … … 372 352 This expression of the iso-neutral diffusion has been chosen in order to satisfy the following six properties: 373 353 \begin{description} 374 \item [$\bullet$ horizontal diffusion]354 \item [$\bullet$ horizontal diffusion] 375 355 The discretization of the diffusion operator recovers the traditional five-point Laplacian in 376 356 the limit of flat iso-neutral direction: … … 383 363 \] 384 364 385 \item [$\bullet$ implicit treatment in the vertical]365 \item [$\bullet$ implicit treatment in the vertical] 386 366 In the diagonal term associated with the vertical divergence of the iso-neutral fluxes 387 367 \ie\ the term associated with a second order vertical derivative) … … 397 377 can be quite large. 398 378 399 \item [$\bullet$ pure iso-neutral operator]379 \item [$\bullet$ pure iso-neutral operator] 400 380 The iso-neutral flux of locally referenced potential density is zero, \ie 401 381 \begin{align*} … … 413 393 the definition of the triads' slopes \autoref{eq:ALGOS_Gf_slopes}. 414 394 415 \item [$\bullet$ conservation of tracer]395 \item [$\bullet$ conservation of tracer] 416 396 The iso-neutral diffusion term conserve the total tracer content, \ie 417 397 \[ … … 421 401 This property is trivially satisfied since the iso-neutral diffusive operator is written in flux form. 422 402 423 \item [$\bullet$ decrease of tracer variance]403 \item [$\bullet$ decrease of tracer variance] 424 404 The iso-neutral diffusion term does not increase the total tracer variance, \ie 425 405 \[ … … 434 414 the field on which it is applied become free of grid-point noise. 435 415 436 \item [$\bullet$ self-adjoint operator]416 \item [$\bullet$ self-adjoint operator] 437 417 The iso-neutral diffusion operator is self-adjoint, \ie 438 418 \[ … … 446 426 \end{description} 447 427 448 % ================================================================449 % Skew flux formulation for Eddy Induced Velocity :450 % ================================================================451 428 \subsection{Eddy induced velocity and skew flux formulation} 452 429 … … 602 579 603 580 $\ $\newpage %force an empty line 604 % ================================================================605 % Discrete Invariants of the iso-neutral diffrusion606 % ================================================================607 581 \subsection{Discrete invariants of the iso-neutral diffrusion} 608 582 \label{subsec:ALGOS_Gf_operator} … … 767 741 There is no need to develop a specific to obtain it. 768 742 769 \newpage770 771 % ================================================================772 % Discrete Invariants of the skew flux formulation773 % ================================================================774 743 \subsection{Discrete invariants of the skew flux formulation} 775 744 \label{subsec:ALGOS_eiv_skew}
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