شبيه سازي عددي حركت نرمال بلور يخ در بارورسازي ابر همرفتي ابرسرد با استفاده از دي اكسيدكربن مايع

Numerical Modeling for Motion of Ice-crystal Thermal in Liquid Carbon Dioxide Seeding of a Supercooled Convective Cloud

In order to modify weather with the following goals: (precipitation enhancement, control of weather hazards and fog dissipation. Prof. Norihiko fukuta from I. tab 1. university designed the new method of cloud seeding with lipid carbon dioxide (l.C) in (Ohl. He has carried out many experiments with successful results in some countries In this paper. numerical model of horizontal seeding of supercooled cloud with If which has been designed tad developed for the first_ lime. is introduced. this modeling has been done in RETHIT process and has been explained briefly. After horizontal penetration of LC at low level of a supercooled convective cloud. ice crystals will he produced due to homogeneous nucleation. The funned ice crystal thermal will he transformed inn) twin ice crystal thermal in Ilse direction of Hight path. they roll-up while expand due to the release of phase change latent heat. This process is called RETHIT. The model is two-dimensional, covering an area of 4 km x 6 km in the x and r. directions with 50 rn grid intervals. The result of the computation in this modeling shows that the ice crystal Thermal reaches the cloud top in 23 ruin. It has a good adaptation in the experimental error range with the results of experimentals which has been carried out in the joint research project of cloud seeding between Kyushu Univ. Japan and Utah Univ. (U.S.A.), in Fukuoka Pref. (Kyushu-Japan).