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  • Documentation

    Starting a PWC Run and Accessing Run Information

    In a Pedestrian Wind Comfort (PWC) analysis, before starting a simulation run, you need to ensure that the simulation tree reflects the minimum setup completion. See below:

    pwc analysis checklist using simulation tree in simscale
    Figure 1: Simulation tree checklist for PWC analysis

    This is the minimum required setup for a PWC simulation to run. Entities not marked with a complete state are optional.

    When you are confident that your simulation settings are accurate and ready to be solved then you can start a simulation run. To start a simulation you simply need to click the ‘+’ button at the bottom of the simulation tree next to Simulation Runs. This will lead to a New run window. Click on ‘Start’.

    a window by the name new run asking to start the simulation.
    Figure 2: New run window that appears just before the run. Click on ‘Start‘ to begin the simulation run.

    This automatically starts a parallel simulation for each wind direction and once finished, will compile all the results into statistical results based on the comfort criteria.

    Did you know?

    The solver for PWC analysis in SimScale incorporates the lattice Boltzmann method (LBM). The mesh used for domain discretization is a Cartesian mesh.

    Once the simulation has been initialized, it will give a readout of the key automatic settings applied such as the wind tunnel size, Reynolds scaling factor, mesh and time step sizes, etc. Checking into the Event log at the end of a successful simulation should reveal the following:

    event log showing important automated information during and after the simulation.
    Figure 3: Important parameters automated for the PWC simulation. A user only has control over the minimum cell size while setting up mesh parameters. Note: This information is also available while the simulation is running.

    Typically, a minimum cell size of ~1 \(m\) leads to good results. For accurate, mesh independent results, typically a value of around 0.5 \(m\) will be displayed.

    Below is the list of the relevant tutorial and some knowledge base articles surrounding the topic of pedestrian wind comfort.

    Last updated: August 25th, 2022

    What's Next

    part of: Pedestrian Wind Comfort Analysis