Numerical simulation of wind pressure on concave gable roof with cornice

A renormalization group k-e model based on the Reynolds Averaged Navier-Stokes Equations(RANS) turbulence model is added in software Fluent to numerically simulate wind pressure distribution and the wind flow field around a concave low-rise building with eaves.A detailed parametric study is performed for average wind pressure coefficients of low-rise building with eaves.The parameters include roof pitch,wall height,wall width,wall length and cornices forms.The numerical results show that the wind pressure over roof is not affected by the geometry dimensioning of building significantly.Wind attack angle,roof pitch and cornices forms affect both the magnitude and distribution of wind pressure over gable roof.Wind pressures over the roof increase with the increasing of height-width ratio,where wind pressures over windward roof decrease while those over leeward roof increase with the increasing of roof pitch.Furthermore,both vertical and horizontal cornices change greatly the wind pressure distribution around the roof.