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1·Select Plastic Material with large thermal diffusivity.

选择热扩散系数大的塑料。

2·The thermal diffusivity of steel and graphite is measured.

测量了钢和石墨的热扩散率。

3·The turbulent diffusivity is unfavourable to ascending motion.

湍流扩散作用不利于上升运动形成。

4·The barrier diffusivity of coal effects its combustion greatly.

煤的灰层扩散系数对煤粒的燃烧有较大的影响。

5·Diffusivity is an important parameter of the mass transfer process.

扩散系数是传质过程的一个重要参数。

6·There is a maximum of the surface diffusivity in high surface coverage.

在表面覆盖度比较高时，表面扩散系数有一极大值。

7·In materials marked by low thermal diffusivity, the absorption is good.

热扩散率低的物质吸收性好。

8·Therefore, the method is a simple workable one for calculation of soil water diffusivity.

因此，三次样条函数法是计算土壤水分扩散率的一种简便可行的方法。

9·The results show that the thermal diffusivity decrease with annealing temperature elevating.

结果表明：纳米氧化铝的热扩散率随退火温度的升高而减小。

10·So the turbulent diffusivity in gradient transfer model of scalar should be a second order tensor.

因此，在用梯度准则模拟湍流输运时，其输运系数应是一个二阶张量。

(1)thermal diffusivity热扩散率；热扩散系数