Changes between Version 70 and Version 71 of doc/tec/bc
- Timestamp:
- Sep 13, 2021 10:39:51 AM (3 years ago)
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doc/tec/bc
v70 v71 532 532 #!Latex 533 533 \begin{equation*} 534 R_{ i,i} = u_{*}^2\,( 0.35\,(-\frac{z_i}{\kappa\,L})^\frac{2}{3} + (5 - 4\,\frac{z}{z_i}) )\,, \: (i \in (1,2)\,,534 R_{1,1} = u_{*}^2\,( 0.35\,(-\frac{z_i}{\kappa\,L})^\frac{2}{3} + (5 - 4\,\frac{z}{z_i}) )\,, \: (i \in (1,2)\,, 535 535 \end{equation*} 536 536 }}} … … 545 545 #!Latex 546 546 \begin{equation*} 547 R_{ i,i} = w_{m}^2\,( 1.5\,(\frac{z}{z_i})^\frac{2}{3}\,exp[-2\,\frac{z}{z_i}] + (1.7 - \frac{z}{z_i})\,(\frac{u_{*}}{w_m})^2)\,, \: (i \in (3)\,,547 R_{3,3} = w_{m}^2\,( 1.5\,(\frac{z}{z_i})^\frac{2}{3}\,exp[-2\,\frac{z}{z_i}] + (1.7 - \frac{z}{z_i})\,(\frac{u_{*}}{w_m})^2)\,, \: (i \in (3)\,, 548 548 \end{equation*} 549 549 }}} … … 563 563 \end{equation*} 564 564 }}} 565 In order to allow for a dynamic adjustment of the strength of the imposed turbulence, the Reynolds stress tensor is update at regular intervals that can be adjusted individually. In other words, the turbulence generator considers for changing atmospheric stability in case of a multi-day simulation. For further information about this approach we refer to [https://doi.org/10.5194/gmd-14-5435-2021 Kadasch et al. (2021)].565 In order to allow for a dynamic adjustment of the strength of the imposed turbulence, the Reynolds stress tensor is updated at regular intervals that can be adjusted individually. In other words, the turbulence generator considers for changing atmospheric stability in case of a multi-day simulation. For further information about this approach we refer to [https://doi.org/10.5194/gmd-14-5435-2021 Kadasch et al. (2021)]. 566 566 567 567 At this point we emphasize that using the turbulence generator from [#xie2008 Xie and Castro (2008)] only generates turbulence which is correlated in space and time but not necessarily generate realistic turbulent structures. Large coherent structures like e.g. hexagonal pattern as typically observed in a convective boundary layer, however, cannot be generated by this method.