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OpenFOAM 2.2.0: fvOptions | OpenFOAM
updated actuationDiskSource — a momentum disk, e.g. to emulate a wind turbine;
md  ofm 
october 2017 by aries1988
Roughness Map - WAsP - Global Mapper Forum
There isn't a special solution for this yet (we were kind of hoping WaSP would make their handling of roughness areas easier to use to avoid a messy workaround, but I don't know if this will happen). The best workaround for now is to create the buffers with a small negative distance to shrink the roughness areas so they don't touch each other since this is the problem. Really with roughness areas the ROUGH_L and ROUGH_R don't make sense as you really just need a roughness value inside the area and other areas can cover the outside areas, but Wasp doesn't quite work that way. Because of this the ROUGH_R value will be the roughness inside the area (for clockwise areas) and you can then edit the ROUGH_L to be an invalid roughness for the very tiny stripe between areas after shrinking them.
explained  tool  terrain  data  md  ofm 
october 2017 by aries1988
Wind turbine maker Goldwind looks beyond Xinjiang
Dabancheng wind farm’s location in a natural wind tunnel in China’s Xinjiang province makes it one of the best situated in the world. It is also a showcase for the turbine manufacturer Goldwind, which became the largest supplier in the world after installing so much turbine capacity in 2015 that it overtook Vestas of Denmark.

Whether or not those young enthusiasts make the trip, Goldwind is coming to them. Last year, China accounted for half the world’s wind power installation. It now has a third of the world’s total wind power generation capacity.

However, a bottleneck in transmission lines out of the region means that almost half its installed wind power went unused in the first quarter of 2016.

Most of Goldwind’s technology is licensed from Germany’s Vensys, although Goldwind has made alterations to the original designs.

Currently, wind power generation in the north of China (home to strong and regular winds) costs slightly less than thermal power generation in the south, where coal is more expensive and emissions standards are stricter. However, coal is cheapest in Xinjiang and northern China, leaving wind power at a disadvantage in its most favourable region.
md  eolien  chinese  reportage  video 
october 2017 by aries1988
Shuttle Radar Topography Mission - Wikipedia
The Shuttle Radar Topography Mission (SRTM) is an international research effort that obtained digital elevation models on a near-global scale from 56° S to 60° N,[2] to generate the most complete high-resolution digital topographic database of Earth prior to the release of the ASTER GDEM in 2009. SRTM consisted of a specially modified radar system that flew on board the Space Shuttle Endeavour during the 11-day STS-99 mission in February 2000, based on the older Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar (SIR-C/X-SAR), previously used on the Shuttle in 1994. To acquire topographic data, the SRTM payload was outfitted with two radar antennas.[2] One antenna was located in the Shuttle's payload bay, the other – a critical change from the SIR-C/X-SAR, allowing single-pass interferometry – on the end of a 60-meter (200-foot) mast that extended from the payload bay once the Shuttle was in space.[2] The technique employed is known as interferometric synthetic aperture radar.
radar  data  earth  terrain  md 
september 2017 by aries1988
Where to download free elevation data for Europe? - Geographic Information Systems Stack Exchange
The 3-arc second (~90 meter) SRTM covers all of Europe to 60° N, has good positional accuracy and is part of the public domain
data  explained  geography  md 
september 2017 by aries1988

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