Urban Large-Eddy Simulation

Authors: Helge Knoop, Marius Keck, Siegfried Raasch

Full Title: Urban Large-Eddy Simulation - Influence of a densely build-up artificial island on the turbulent flow in the city of Macau

Description:

The approaching flow above the sea shows a comparatively low turbulence intensity due to the smooth water surface. Within the building areas, strong turbulence is generated by two main reasons. One is the additional wind shear due to the walls of isolated highrise buildings. Furthermore, due to the significant increase in surface roughness, a so called internal boundary layer with enhanced turbulence develops above the building areas. The depth of this layer grows in downstream direction .

During the animation the camera moves through three major viewing angles . The first part of the animation starts with an aerial view onto the whole Macau area. Afterwards the camera zooms in, displaying those areas of the model domain , in which the flow field is particularly influenced by buildings. The second part is a side view from close above the surface and shows the above mentioned internal boundary layer. The last part shows another aerial view focusing on the gap between the artificial island and the Macau Peninsula, where turbulence decreases as it is advected across the gap.

Copyright 2014 Institut für Meteorologie und Klimatologie, Leibniz Universität Hannover (LUH)

Amazing, dont you have a video with the total pressure?