Designing for smoking rooms

The purpose of that study was to quantify the effect of the variables (previously identified during the first phase of that study conducted from 1999 to 2002) concerning smoking room performance under controlled laboratory conditions.In a test chamber simulating a smoking room, 27 experiments were conducted.

Measurement and prediction of indoor air flow in a model room

There is a relationship between geometric room parameters and the air flow patterns produced by mechanical ventilation systems. Experimental measurements of indoor air flows in a one-tenth sub-scale model room were made and compared to numerical simulations. The results show how obstructions can influence the air flow and contaminant transport in a room.

COMIS v3.1 simulation environment for multizone air flow and pollutant transport modelling

In this paper the main features and the latest improvements of COMIS (that simulates multizone air flow and pollutant transport) are presented.

Indoor air flow analysis based on lattice Boltzmann methods

This paper presents the modeling of convective flows based on lattice Boltzmann methods in combination with a large eddy turbulence model. The used example is complex and three-dimensional.

Fundamental atrium design for natural ventilation

This paper focuses on the degree of flow enhancement achieved by an atrium which is itself ventilated directly by a low-level connection to the exterior.A theoretical model is designed to predict the steady stack-driven displacement flow along with the thermal stratification in the building due to heat gains in the storey and solar gains in the atrium. Comparison is then made with the results of laboratory experiments

Air flow distribution in and around a single-sided naturally ventilated room

This paper aims at comparing calculated and measured air flow distributions inside a naturally ventilated test room. Wind tunnel trials were carried out in the test room.Separate air flow and thermal modelling programs are used to predict the spatial distribution of the air flow and thermal comfort.

Measurement and calculation of the neutral height in a room with displacement ventilation

Thanks to an environmental chamber equipped with a displacement ventilation system, neutral height measurements were carried out with the presence of a heated mannequin and other heat sources.The relationship between the neutral height for air distribution and the ventilation load in a room with displacement ventilation was investigated.

Deterministic simulation and assessment of air-recirculation performance of unidirectional-flow cleanrooms that incorporate age of air concept.

A CFD model that incorporates fan-performance characteristics was applied to investigate and compare the air-recirculation performance of the two general designs of unidirectional-flow cleanrooms. For the simulation, typical flow-resistance models of the various components in the air path were used.

Airflow characteristics in the outlet region of a vortex room air diffuser

In this paper, the airflow characteristics in the outlet region of a generic vortex diffuser are experimentally and numerically investigated. A specific arrangement of tetrahedral and hexahedral cells was used in grid generation: it has been found ideal for the analysis of the room air movement due to an air diffuser.
Corresponding airflow measurements were conducted by using a three dimensional ultrasonic anemometer.

Automatically generated zonal models for building air flow simulation: principles and applications

Starting from models library, a zonal model of an entire building can be constructed by assembling the appropriate modules. A model-generating tool called GenSPARK makes the process automatic. This paper describes how that tool works and give examples of configurations that can be analyzed.