Annotated Bibliographies

Submitted by on Wed, 09/11/2013 - 17:22

A series of bibliographies aimed at researchers, designers and engineers etc. who are seeking an overview of developments on subjects including ventilation, air infiltration and related fields. The references quoted in these documents are taken from the AIVC’s bibliographic database (AIRBASE)

Contributed Reports

Submitted by on Wed, 09/11/2013 - 17:15

Contributed Reports are reports produced by third parties but considered of relevance for the AIVC target audience.

Literature Lists

Submitted by on Wed, 09/11/2013 - 17:10

Literature Lists

10 Sep

What is VIP about

Ventilation Information Papers (VIP) are a series of short AIVC publications (6 to 8 pages) intended for giving a basic knowledge of some aspects related to the air infiltration and/or the ventilation.

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3DFLOW Development and Validation for Three Cases - Downward Mixing, Partition and Displacement Ventilation

Submitted by on Sat, 07/06/2013 - 16:56

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.

A CFD Analysis of the Air Flow Characteristics at an Inflow Opening

Submitted by on Sat, 07/06/2013 - 16:55

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 Fundamental Study on the Air Flow Structure of Outflow Openings

Submitted by on Sat, 07/06/2013 - 16:54

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.

A Simple 1-D Boundary Condition Representing Combined Convective-Radiative Heat Transfer Across a Double Membrane Semi-Transparent Assembly

Submitted by on Sat, 07/06/2013 - 16:53

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.

A Wind Tunnel Full-Scale Building Model Comparison between Experimental and CFD Results based on the Standard k-e Turbulence Representation

Submitted by on Sat, 07/06/2013 - 16:52

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.

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