Starting from the basic governing equations for fluid flows, a three-dimensional computational fluid dynamics (CFD) code is described. The pre-processing and post-processing software was integrated with the CFD code to form a more user-friendly computer package. This new computer package has been used to carry out several simulations on air and smoke movement in atrium with balconies. It has been found that the pre?processing and post-processing software can greatly reduce the data preparation and analysis time. It can also reduce the likelihood of making errors in data entry.

There are several stages in developing and using information technology to deliver its full benefits to building design for the construction industry:

1 . Specifying the user need

2. Developing application software

3. Testing and validating technical programs

4 . Encouraging understanding and use of appropriate systems

5. Integrating individual applications across disciplines

6. Establishing the right standards and commercial framework for integration.

The Energy-related Environmental Issues (EnREI) Programme was established in 1991 by DoE Construction Sponsorship Directorate and BRE, with the aim of reducing emissions of C02 and other greenhouse gases due to energy use in non-domestic buildings.