Table 3.

Comparison of three iterative methods using $P_2-P_1-P_2-P_2$ ($h=\frac{1}{64}$ and $\nu =1.0\times {10}^{-2}$).

Scheme	$\frac{{∥\mathit{\nabla }(\mathit{u}-{\mathit{u}}_{\mathit{h}}^{\mathit{n}})∥}_0}{{∥\mathit{\nabla }\mathit{u}∥}_0}$	$\frac{{∥\mathit{p}-{\mathit{p}}_{\mathit{h}}^{\mathit{n}}∥}_0}{{∥\mathit{p}∥}_0}$	$\frac{{∥\mathit{\nabla }(\mathit{T}-{\mathit{T}}_{\mathit{h}}^{\mathit{n}})∥}_0}{{∥\mathit{\nabla }\mathit{T}∥}_0}$	$\frac{{∥\mathit{\nabla }(\mathit{C}-{\mathit{C}}_{\mathit{h}}^{\mathit{n}})∥}_0}{{∥\mathit{\nabla }\mathit{C}∥}_0}$
I	0.000738137	0.000200965	0.000359132	0.00094964
II	0.000738136	0.00020096	0.000359132	0.00094964
III	—	—	—	—