该文从二维方腔流动的涡流函数方程出发，建立了方腔内热对流的非定常数值计算模型。
The numerical scheme for unsteady thermal convection flow in a square cavity is developed in this paper.
数值模拟同时还发现流动性指标属于一种统计平均值而并非恒定不变的常数值，这将有助于对流动性评价指标的重新思考和定位。
Bi-channel fluidity test modulus simulation suggests that different channel formed different length in a practical experiments, it also proved fluidity indexes should be an average value.
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