![\"pedestrian](\"https:\/\/frontend-assets.simscale.com\/media\/2020\/02\/urban_domain_wind_speedup-1.png\")
<\/a>The PWC analysis type is extremely streamlined to allow the user to set up and run a simulation from geometry upload in minutes with 3 simple steps. The setup is automated using best practices and validation exercises to ensure that fast results are complemented with accuracy. Although this highly automated workflow is in place, much of the parameters can be manually adjusted if required.
<\/p>\n\n\n
<\/a>The underlying technology used to solve the fluid flow around the buildings is the Lattice Boltzmann Method (LBM), by Pacefish\u00ae<\/strong>\\(^1\\)<\/strong><\/strong>. There are several key things that make this stand out in comparison to its competition. LBM is able to solve almost regardless of the geometry quality given to it, and therefore, geometry preparation and cleaning are almost removed provided some guidelines are followed. In some real cases, this has reduced weeks of CAD preparation work to a matter of hours. <\/p>\n\n\n\n LBM method also uses a different technology to solve on. Where the standard OpenFOAM solvers use CPUs, LBM uses GPUs (Graphics processors) enabling many more parallel processes to occur, and therefore solve times are rarely longer than a few hours for a complex case. This puts the PWC solver in a good place where users can expect an entire turnaround in a day once they are familiar with the processes. This solver uses the k-omega SST DDES turbulence model<\/a>. To create a PWC analysis, first, select the desired geometry and click on \u2018Create Simulation\u2019<\/strong>:<\/p>\n\n\n\n Next, a window with a list of several analysis types supported in SimScale will be displayed:<\/p>\n\n\n\n Choose the PWC analysis type and proceed to create a simulation. <\/p>\n\n\n\n <\/i>Specialized Analysis Type<\/p>\n <\/div>\n Pedestrian Wind Comfort<\/em> is a specialized analysis type restricted to users with a paid plan. For more details please visit our product & pricing page<\/a> or contact sales. Our PWC analysis type takes all the standard geometry formats that we advertise in the geometry upload section of the documentation. Typically, however, geometry comes from one of the common tools used by architect firms and wind engineers, which are mainly Revit and Rhino (others exist and if they can export STL then they are also fine). Therefore the main format types relevant here are Rhino (.3dm) and STL <\/a>(.stl). <\/p>\n\n\n\n More details regarding geometry requirements and how to prepare the CAD for best results with Pedestrian Wind Comfort can be found here<\/a>.<\/p>\n\n\n\n The Region of interest<\/em> is a very important stage of simulation setup. The core functionality of the region of interest is to define the area around the main building\/area on which the pedestrian comfort should be evaluated. Additionally, it is used as a reference to automatically size and orient the virtual wind tunnel.<\/p>\n\n\n\n The settings panel has the following parameters:<\/p>\n\n\n More details on how to correctly define the region of interest parameters can be found here<\/a>.<\/p>\n\n\n\n Under Wind conditions<\/em> not only the local wind statistics for the target area are defined, but also the wind engineering standard, according to which the analysis will be run and the results will be evaluated. <\/p>\n\n\n\n Currently, four different Wind Engineering Standards are available on SimScale – Eurocode EN 1991-1-4<\/strong>, the standard in Europe including the UK; AS\/NZS 1170.2<\/strong>, the standard in Australia and New Zealand; NEN8100<\/strong>, the standard for the Netherlands and most recently also the London City Wind Microclimate Guidelines<\/strong>, which were specifically designed for the City of London region. <\/p>\n\n\n
<\/p>\n\n\n\n<\/a>Creating a Pedestrian Wind Comfort Analysis<\/h2>\n\n\n\n
<\/a><\/a>
<\/p>\n <\/div>\n<\/div>\n\n\n\nGeometry for Pedestrian Wind Comfort<\/h2>\n\n\n\n
Region of Interest<\/h2>\n\n\n\n
<\/a>Wind Conditions<\/h2>\n\n\n\n