Study on Flow Field Characteristics in Sandstorm Conditions Using Wind Tunnel Test

To study the sandstorm resistance design of civil structures and transportation infrastructures, flow fields with various grain concentrations were simulated by windblown sand tunnel. The results show that concentration profile presents an exponential decay form before critical wind speed; as test speed increases, decreases initially increases afterwards height, characteristic height moving while creep percentage decreases. Moving grains reduce increase turbulence intensity, whole process is affected concentration. field a mutual feedback mechanism, which affects wind-induced response impact to structures. variation kinetic energy similar total in fields. Specifically, increasing speed, but height. Furthermore, heights are both about 0.2 m, has little on