English

The glossary gives the translation (English/Dutch - Dutch/English) of more than 1000 terms related to air infiltration and ventilation.

This document is intended for use as a supplement to AIRGLOSS (AIVC TN 5). All terms in AIRGLOSS are included together with some supplementary materials for which definition was considered superfluous.

This document is the Italian translation of the AIRGLOSS (AIVC TN 5).

The glossary provides the definition of 700 terms related to air infiltration and ventilation (including formulas). The intention of the document is to promote a more uniform use of terms in the area of ventilation.

The Glossary consists of main terms with definitions followed by any subsidiary terms. The main terms are in alphabetic order.

The glossary gives the translation (English/French - French/English) of more than 1000 terms related to air infiltration and ventilation.

This document is intended for use as a supplement to AIRGLOSS (AIVC TN 5). All terms in AIRGLOSS are included together with some supplementary materials for which definition was considered superfluous.

The glossary gives the translation (English/German - German/English) of more than 1000 terms related to air infiltration and ventilation.

This document is intended for use as a supplement to AIRGLOSS (AIVC TN 5). All terms in AIRGLOSS are included together with some supplementary materials for which definition was considered superfluous.

The glossary provides the definition of 700 terms related to air infiltration and ventilation (including formulas). The intention of the document is to promote a more uniform use of terms in the area of ventilation.

The Glossary consists of main terms with definitions followed by any subsidiary terms. The main terms are in alphabetic order.

The glossary also indicates the properties of 18 tracer gases and gives a unit conversion table.

The 3DFLOW code has been developed based on:
· The standard three-dimensional K-epsilon two-equation turbulence model;
· A modification for buoyancy effects;
· Wall functions applied to deal with solid boundary conditions;
· An adaptation of the SIMPLE algorithm.
The representative indoor air flows in conditioned spaces, including downward mixing, partition and displacement ventilation cases, were simulated and analysed in detail using the 3DFLOW code. Good agreement was found between the numerical predictions and experimental data.

In the present study, a numerical simulation to simulate an experiment for evaluating the cross-ventilation performance at an inflow opening by using Large Eddy Simulation (LES), the standard k-e model, and Durbin's k-e model was performed. Results showed that too much turbulent kinetic energy was produced at the leeward opening frame in the standard k-e model. However , Durbin's k-e model improved this defect , and reproduced the wind tunnel results fairly well, as did the LES approach.

A Local Dynamic Similarity Model, applicable to dynamic similarity of cross-ventilation, has been applied to outflow openings. Cross-ventilation performance at the openings on the outflow side has been evaluated, and the structure of air flows around the outflow openings has been studied by LES and wind tunnel experiments. It was found that LES reproduces the wind tunnel experiment results fairly well, such as the extensive increase of discharge coefficient in a small region where dimensionless room pressure, PR*, is low.

In computer simulations of buildings and other structures, in relation to HVAC and fire, it is fairly common to need to represent boundaries which are made up of double semi-transparent membranes. An obvious example is a double-glazed window. When setting up a Computational Fluid Dynamics (CFD) model of the building, it is sometimes the case that detailed representation of this type of boundary is superfluous, and the CFD user wishes simply to replace the assembly by thermal and radiative boundary conditions.

To evaluate the property of cross ventilation quantitatively, it is important that the calculated air flow field is compared with measurement. In this paper, the air flow field in the wind tunnel of the Building Research Institute of Japan (BRI) was calculated by CFD analysis using the standard k- e model, and the adequacy of the calculation was examined by comparison with measured values.