The two-phase flows over the sand bed and in the pipe are simulated, the different distributions of volumetric fraction are found and analyzed.
计算了沙层上及直管中的两相流的流动，发现了颗粒浓度两种截然不同的分布，并对此进行了分析。
And the sand ripples on the surface arise obviously with the increasing silt mass fraction and wind speed, but disappear as silt mass fraction exceeds 15%.
实验中沙波纹的高度和波长随风速及粉粒的质量分数的增大而增大，而当粉粒的质量分数超过15%时沙波纹消失。
Further results indicate that the thermal conductivity of sand mold and the high fraction of binder alloying for the low melt point in the block will affect the quality of FGM.
进一步研究表明，砂型材料的导热率及合金粉块内低熔点的熔合剂过多均会影响复合材料的质量。
Further results indicate that the thermal conductivity of sand mold and the high fraction of binder alloying for the low melt point in the block will affect the quality of FGM.
进一步研究表明，砂型材料的导热率及合金粉块内低熔点的熔合剂过多均会影响复合材料的质量。
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