Theoretical and experimental studies show that during hail growth the heatand mass transfers play a determinant role in growth rates and different structures. However, manynumerical model researchers made extrapolatio...Theoretical and experimental studies show that during hail growth the heatand mass transfers play a determinant role in growth rates and different structures. However, manynumerical model researchers made extrapolation of the key heat transfer coefficient of the thermalbalance expression from measurements of evaporating water droplets obtained under small Renoldsnumbers (Re ≤ 200) introduced by Ranz and Marshall, leading to great difference from reality. Thispaper is devoted to the parameterization of measured heat transfer coefficients under Renoldsnumbers related to actual hail scales proposed by Zheng, which are then applied, to Hu-He 1D and 3Dmodels for hail growth respectively, indicating that the melting rate of a hailstone is 12%-50%bigger, the evaporation rate is 10%-200% higher and the dry-wet growth rate is 10%-40% larger fromthe present simulations than from the prototype models.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No. 49775255.
文摘Theoretical and experimental studies show that during hail growth the heatand mass transfers play a determinant role in growth rates and different structures. However, manynumerical model researchers made extrapolation of the key heat transfer coefficient of the thermalbalance expression from measurements of evaporating water droplets obtained under small Renoldsnumbers (Re ≤ 200) introduced by Ranz and Marshall, leading to great difference from reality. Thispaper is devoted to the parameterization of measured heat transfer coefficients under Renoldsnumbers related to actual hail scales proposed by Zheng, which are then applied, to Hu-He 1D and 3Dmodels for hail growth respectively, indicating that the melting rate of a hailstone is 12%-50%bigger, the evaporation rate is 10%-200% higher and the dry-wet growth rate is 10%-40% larger fromthe present simulations than from the prototype models.
