Calibration of Discrete Element Simulation Parameters for Powder Screw Conveying

Table 7

ANOVA of quadratic polynomial model of Box-Behnken experiment.

Source of variation	Mean square	Freedom	Quadratic sum	F value	value
Model	0.0063	9	0.0085	31.83	0.0007
H	0.0070	1	0.0070	26.36	0.0037
J	0.0566	1	0.0566	212.69	<0.0001
K	0.0023	1	0.0023	8.76	0.0315
HJ	8.1 × 10–6	1	8.1 × 10–6	0.0305	0.8682
HK	0.0000	1	0.0000	0.0473	0.8364
JK	8.7 × 10–6	1	8.7 × 10–6	0.0327	0.8637
H^2	0.0012	1	0.0012	4.53	0.0867
J^2	0.0079	1	0.0079	29.50	0.0029
K^2	0.0009	1	0.0009	3.28	0.1299
Residual	0.0013	5	0.0003
Lack of fit	0.0013	3	0.0004	48.64	0.0202
Pure error	0.0000	2	9 × 10–6
Sum	0.0776	14
R^2 = 0.9828. Adjusted R^2 = 0.9520. Predicted R^2 = 0.7287. CV = 0.72%. Adep Precision = 18.42