粒径分布を考慮した浮遊性傾斜サーマルの流動特性

概要

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The experiments on the non-conservative inclined wall thermals using the mixture of water and barium sulfate particles are carried out. The experimental results obtained are compared with the numerical simulations. The new numerical model of an inclined wall thermal is proposed, in which the distribution of grain size is taken into account. The model consists of the continuity equation, the mass conservation equation and the momentum equation. In the model, the dimensionless value a related to the entrainment coefficient E_W, the form drag coefficient C_D, and the grain size D_s are chosen as parameters. Comparing the results of the numerical calculation with experimental results of inclined thermals, the values of α = 0.5, C_D = 0 to 0.5 and D_s = 0.017〜0.029mm are obtained.
長岡技術科学大学の論文
2000-03-29