Second Law Analysis of Laminar Flow in a Circular Pipe Immersed in an Isothermal Fluid

Table 4

Comparison of dimensionless entropy generation 𝜓 with PPR for water and ethylene glycol.

Re	Water		Ethylene glycol
	𝜓	PPR	𝜓	PPR
100	2.62𝐸−05	5.63𝐸−10	8.78𝐸−07	7.76𝐸−06
500	8.08𝐸−06	1.15𝐸−08	1.82𝐸−07	0.000193
1000	4.28𝐸−06	4.48𝐸−08	9.8𝐸−08	0.000774
1500	2.91𝐸−06	9.99𝐸−08	7.33𝐸−08	0.00174
2000	2.21𝐸−06	1.77𝐸−07	6.33𝐸−08	0.003094
2500	1.78𝐸−06	2.76𝐸−07	5.91𝐸−08	0.004834
3000	1.49𝐸−06	3.96𝐸−07	5.8𝐸−08	0.00696