Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
I'm not 100% sure what you mean by "show the path of infiltration through windows". If you want to break this down to sub-component level, for example tracking infiltration through different parts of an opening such as the head, cill, mullions etc. then you can't do that. If you mean you want to calculate and see the infiltration rate through openings and its impact on space conditions then you can do that. You would set up a calculated natural ventilation simulation with the infiltration details specified (if you don't have data this could be an estimate using a crack template ranging from excellent (airtight) to very poor (leaky)) and run that to quantify the infiltration rate. You then select a time-step from the simulation results that represents the conditions of interest and input the simulation results as boundary conditions to the CFD calculation. You can transfer simulation data to populate the CFD starting/boundary conditions. As far as I recall the infiltration associated with a zone would be assigned to the relevant opening/s. Bear in mind that infiltration (as opposed to intentional ventilation) is likely to be small relative to the other convective/momentum forces in the zone from HVAC equipment etc. This process is shown in webinars and tutorials available on the DesignBuilder website, and the inputs associated with infiltration are detailed in the Help file. If you need further help you should contact the DesignBuilder Support Desk.
