What is CFD?
Computational Fluid Dynamics (CFD) analysis is used by building environmental designers to calculate the temperature, velocity and other fluid properties through a 3-D domain. CFD is used to answer design questions such as:
DesignBuilder 3-D CFD
DesignBuilder CFD has been especially designed to provide data on airflow and temperature distribution in and around buildings using the same methods as the general purpose pure CFD packages, but at a fraction of the cost and without the need for specialist knowledge.
Using conventional CFD packages for building airflow analysis can be a time consuming task requiring very careful attention to setting up the correct geometry and boundary conditions. Using CFD in DesignBuilder simplifies this process hugely by automatically providing the geometry and boundary conditions. Temperatures, heat flows and flow rates previously calculated by EnergyPlus can be seamlessly used to provide boundary conditions simply by specifying the time/date of the CFD analysis.
The CFD interface has been designed to enable virtual ‘push-button’ CFD analysis from automatically generated rule-based default data, with options to allow more experienced or interested users to modify this data as required. Adopting this approach enables users to obtain realistic 3-D results without having any specialist CFD knowledge.
Some of the key DesignBuilder CFD features:
The high quality output provided by DesignBuilder CFD will help you to communicate your results to clients in a clear visual way that they can really understand.
DesignBuilder CFD has been independently tested against Pheonics, one of the most powerful and widely respected general purpose CFD packages available. The validation work, carried out by Northumbria University, shows that DesignBuilder is able to reproduce the same results as Pheonics given the same input data. This adds to confidence in the results produced by DesignBuilder CFD.
You can view recorded demonstrations of the DesignBuilder CFD software on the Webinars page. These show how DesignBuilder EnergyPlus surface temperature and airflows results can be fed into CFD as boundary conditions and also how DesignBuilder CFD for can be used as part of the HVAC design process.