ABSTRACT
In recent years, buildings in the UK and other countries have become more vulnerable to driving rain due to changes in construction practice and the higher insulation levels necessary to reduce C(¾ production. Due to climate changes it is expected that exposure to driving rain will increase over which is of particular concern to historic and heritage buildings. An International Standard ISO 15927–1, based on the British standard BS 8104, which is in preparation, contains procedures for predicting rain impact on walls. As part of a project studying moisture impacts on historic buildings, rain impacts on the tower of nineteenth century Brodick castle, have been monitored over a year. A preliminary model to evaluate raindrop trajectories, rain intensities and wind flow around the castle, incorporating a k-ε turbulence model, has been developed using the CFD package Fluent. The results are compared with the experimental data and the predictions of the draft International Standard.
