Numerical Simulation and Sensitivity Analysis Using RSM on Natural Convective Heat Exchanger Containing Hybrid Nanofluids

Table 6

Levels of input factors and response function.

Run order	Coded values			Real values			Response
	A: Ra	B: Ha	C: ϕ	Ra	Ha	ϕ	Nuav
1	0	0	0	500,500	50	0.03	12.854
2	−1	0	0	1,000	50	0.03	2.9985
3	0	1	0	500,500	100	0.03	12.063
4	−1	1	1	1,000	100	0.06	3.5373
5	0	−1	0	500,500	0	0.03	13.159
6	0	0	1	500,500	50	0.06	13.473
7	0	0	0	500,500	50	0.03	12.854
8	1	1	−1	1,000,000	100	0	8.3363
9	−1	−1	−1	1,000	0	0	2.5269
10	0	0	0	500,500	50	0.03	12.854
11	−1	−1	1	1,000	0	0.06	3.5396
12	0	0	0	500,500	50	0.03	12.854
13	1	−1	1	1,000,000	0	0.06	16.695
14	0	0	−1	500,500	50	0	9.2798
15	−1	1	−1	1,000	100	0	2.5174
16	0	0	0	500,500	50	0.03	12.854
17	1	−1	−1	1,000,000	0	0	14.285
18	1	0	0	1,000,000	50	0.03	15.216
19	0	0	0	500,500	50	0.03	12.854
20	1	1	1	1,000,000	100	0.06	14.689