Da Da = 1 Da = 0.1 Da = 0.01 Da = 0.001 $\begin{array}{l}\eta =1/3\\ \xi =2/3\end{array}$ $\frac{\text{d}{u}_{1}}{\text{d}y}\left(\eta \right)=\frac{\text{d}{u}_{2}}{\text{d}y}\left(\eta \right)$ 0.1538176 0.07977407 −0.04941739 −0.1152168 $\frac{\text{d}{u}_{2}}{\text{d}y}\left(\xi \right)=\frac{\text{d}{u}_{3}}{\text{d}y}\left(\xi \right)$ −0.1604999 −0.1231173 −0.0399533 −0.00225 $\begin{array}{l}\eta =1/4\\ \xi =3/4\end{array}$ $\frac{\text{d}{u}_{1}}{\text{d}y}\left(\eta \right)=\frac{\text{d}{u}_{2}}{\text{d}y}\left(\eta \right)$ 0.2365115 0.1575664 0.01321413 −0.06447045 $\frac{\text{d}{u}_{2}}{\text{d}y}\left(\xi \right)=\frac{\text{d}{u}_{3}}{\text{d}y}\left(\xi \right)$ −0.2363372 −0.1570521 −0.027384 −0.003 $\begin{array}{l}\eta =0.49\\ \xi =0.51\end{array}$ $\frac{\text{d}{u}_{1}}{\text{d}y}\left(\eta \right)=\frac{\text{d}{u}_{2}}{\text{d}y}\left(\eta \right)$ −0.002286399 −0.071583 −0.1820249 −0.2237071 $\frac{\text{d}{u}_{2}}{\text{d}y}\left(\xi \right)=\frac{\text{d}{u}_{3}}{\text{d}y}\left(\xi \right)$ −0.02109832 −0.08318887 −0.1736158 −0.167906