We have developed a specitaly fast fluid dynamics (FFD) code based on higher-order spatial and temporal schemes for modling urban microclimates with a few hours computing time for multi-million grid problems.
https://users.encs.concordia.ca/~leonwang/moodle/mod/book/view.php?id=15&chapterid=7
(Edited by Mohammad Mortezazadeh - original submission Thursday, 17 January 2019, 1:51 PM)