Dispersion coefficient (D0) estimated by slope method is close to fitted Z)0 when Brenner number is smaller, but there is the same conclusion only in mid-former section when Brenner number is larger.

• 利用斜率法得到的弥散系数D_0值在Brenner数较小时与拟合的D_0值很接近，而Brenner数较大时则只在BTC的中前段才有类似的结论。