Sludge Formation Analysis in Hydraulic Oil of Load Haul Dumper 811MK V Machine Running at Elevated Temperatures for Bioenergy Applications

Table 6

Correlation and regression analyses between shear stress and shear rate.

Sample	Correlation coefficient of shear stress and shear rate			Regression coefficient of shear stress and shear rate
	40°C	60°C	80°C	R square			Standard error
				40°C	60°C	80°C	40°C	60°C	80°C
0	0.9869	0.9831	0.9126	0.97	0.96	0.83	2.52	1.12	2.02
250	0.9928	0.9838	0.8636	0.985	0.9678	0.7458	2.5094	1.319	2.7884
500	0.9950	0.9865	0.8664	0.989	0.973	0.7507	1.668	1.1532	3.5600
750	0.9913	0.9553	0.8406	0.982	0.9125	0.7065	2.4258	2.2532	2.896