A NUMERICAL-MODEL TO EVALUATE THE PERFORMANCE OF PRESSURE EQUALIZED RAINSCREEN WALLS

被引：13

作者：

BASKARAN, A

机构：

来源：

BUILDING AND ENVIRONMENT | 1994年 / 29卷 / 02期

关键词：

D O I：

10.1016/0360-1323(94)90067-1

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Advancements in Computational Fluid Dynamics (CFD) and numerical modeling techniques provide new approaches to quantify airflow around buildings and wind induced pressures on the building envelope. This paper describes the progress made on developing a numerical model to predict the performance of Pressure Equalized Rainscreen (PER) wall assemblies. The model is three dimensional and time dependent. The Navier Stokes Equations (NSE) are discretized using a control volume method. External wall boundaries are treated with cyclic pressure differentials, the only fluid property available as a boundary condition from the experiment. This paper presents the steps involved in the numerical model development and the effect of static and dynamic parameters on the model predictions. Two types of wall assemblies, one representing an airtight air barrier system and another with a leaky air barrier system, are modeled. Predicted performances of both wall types are analyzed with respect to time and space. Preliminary model validation is performed by comparing computed results with limited experimental data. The paper also includes some of these comparisons for various geometrical configurations of the PER wall assembly.

引用

页码：159 / 171

页数：13

共 24 条

[1]

Garden, Rain penetration and its control, CBD 40, (1963)

[2]

Birkeland, The mechanism of rain penetration, Weathertight Joints for Walls, Proceedings of the International Symposium held in Oslo, pp. 33-34, (1968)

[3]

Killip, Cheetham, The prevention of rain penetration through external walls and joints by means of pressure equalization, Building and Environment, 19, pp. 88-91, (1984)

[4]

Fazio, Kontopidis, Cavity pressure in rainscreen walls, Bldg Envir., 23, pp. 137-143, (1988)

[5]

Inculet, Pressure equalization of rainscreen cladding, M.Sc. Thesis, (1990)

[6]

Baskaran, Extraction of design guidelines for pressure equalized rainscreen walls, Internal Report No. 629, (1992)

[7]

Baskaran, Brown, Performance of pressure equalized rainscreen walls under cyclic loading, J. Thermal Insulation and Bldg Envelope, 16, pp. 183-193, (1992)

[8]

Poirier, Brown, Baskaran, Pressure equalization and the control of rain water penetration, Proceedings of the 6th Building Science and Technology Conference, pp. 15-25, (1992)

[9]

Ganguli, Dalgliesh, Wind Pressures on Open Rain Screen Walls: Place Air Canada, Journal of Structural Engineering, 114, 3, pp. 642-656, (1988)

[10]

Brown, Rousseau, Dalgliesh, Field testing of pressure equalized rainscreen walls, Exterior Wall Symposium, Precast Concrete, Masonry and Stucco, pp. 59-69, (1991)

← 1 2 3 →