溶液对流与温度起伏之间关系的理论模型和实验验证

Theoritical Model and Experimental Evidence of Relation for the Solution Convection and Temperature Fluctuation

建立了二维坐标系下溶液对流与形核之间关系的理论物理模型,结果表明：在周期性边界条件下,只要两个坐标轴方向上液体的流动速度不为零,就能产生周期振荡解。将氯化铵晶体溶于水中,加热到过饱和度温度以上,进行自然冷却,在高于过饱和度温度3.7℃时,进行搅拌,在1-5 s内,液体内大量形核,出现大量晶体,这与理论模型的计算结果相吻合。

The theoretical physics model for relation between the nucleation and the solution convection was established under the two-dimensional coordinate systems.The results indicated that under periodical boundary condition,the cycle oscillation（vibration） solution would appear as long as the fluxion speed of liquid along two coordinate axes isn＇t zero.The ammonium choloride crystal was dissolved in water to obtain the solution of ammonium choloride,and the solution was heated until the temperature was above the supper saturation temperature,then the solution was cooled naturally up to 3.7 ℃ above the supper saturation temperature and stired,a number of nucleation came out and grew to NH4Cl crysal.This was agreed with the results obtained from the theoretical model.