Numerical Simulation of Free Convection in a Partially Heated Three-Dimensional Enclosure Filled with Ionanofluid ([C₄mim][NTf₂]-Cu)

Table 3

Grid refinement and numerical accuracy study.

	Ra = 10^5			Ra = 10^6
	M1	M2	M3	M1	M2	M3
	40^3	60^3	90^3	40^3	60^3	90^3
	3.1	3.158	3.161	6.108	6.174	6.179
		3.1634			6.183
Error %	2.004	0.171	0.076	1.213	0.146	0.065