风沙的危害,人所皆知。防沙治沙一直是国民经济中的重要课题之一。从76年至今,我所应兰州沙漠所要求,已四次用高速摄影手段拍摄风沙两相流运动,研究风沙运动。前三次是微观研究,即是在风洞实验室里,用模拟方法,拍摄模拟砂和天然沙在各种 The hazards of sand, we all know. Desertification and desertification have always been one of the important topics in the national economy. From the 76th to the present, as I demanded by the desert in Lanzhou, four-time high-speed photographic means of filming sandstorm two-phase flow has been used to study wind-sand movement. The first three are microscopic studies, which are conducted in a wind tunnel laboratory using simulated methods of shooting simulated sand and natural sand in various