Experimental and theoretical investigation of heat transfer characteristics of cylindrical heat pipe using Al2O3–SiO2/W-EG hybrid nanofluids by RSM modeling approach

Journal of Engineering and Applied Science

Table 2 Model summary of responses

Model	SD	R squared	Adjusted R squared	Predicted R squared	Adequate precision
Thermal resistance
Linear	0.90	0.9252	0.9152	0.8970	19.963
2FI	0.93	0.9254	0.9094	0.8806	16.683
Quadratic	0.077	0.9996	0.9994	0.9988	167.941	Suggested
Cubic	0.058	0.9998	0.9996	0.9990	181.363	Aliased
Heat transfer coefficient
Linear	3.45	0.9618	0.9567	0.9406	33.402
2FI	3.27	0.9679	0.9610	0.9393	30.856
Quadratic	2.56	0.9831	0.9761	0.9556	32.201	Suggested
Cubic	1.97	0.9925	0.9859	0.9570	33.864	Aliased