Numerical Simulation Of Wind-sand Field Around Tall Buildings

Wind load is one of the important loads on the buildings and is indispensable in the architectural engineering design.With the appearance of long-span roofs,high-rise buildings and long-span bridges,wind load plays a more and more important role in engineering,and it may become one of the control loads for structural design.At present,the study of numerical calculation of wind load has been developed from basic research to the practical application.However,there are few studies in numerical simulation of buildings in the wind-sand field.As the dust storms in north China become frequently,the numerical calculation of buildings in the wind-sand field studied in this paper will have important practical significance.In this paper,numerical calculations are carried out on the single high-rise buildings and two symmetric high-rise building.Hybrid grids are made to divide the domain;the Realizable k-εmodel and Eularian Model are utilized to compute wind-sand field of the planar single body and two adjacent tall buildings in atmospheric boundary layer.The surface pressures of buildings are simulated under the conditions of the volume fraction of the sand respectively as 0(wind field),2%, 4%,6%,8%and 10%and then the results are compared.It is shown that with the increase of the volume fraction of the sand phase,the pressure coefficient increases,and the pressure contour of the building surface changes to some extent.