Leakage Evaluation by Virtual Entropy Generation (VEG) Method
AbstractLeakage through microscale or nanoscale cracks is usually hard to observe, difficult to control, and causes significant economic loss. In the present research, the leakage in a pipe was evaluated by the virtual entropy generation (VEG) method. In virtual entropy generation method, the “measured entropy generation” is forced to follow the “experimental second law of thermodynamics”. Taking the leakage as the source virtual entropy generation, a new pipe leakage evaluation criterion was analytically derived, which indicates that the mass leakage rate should be smaller than the pressure drop rate inside a pipe. A numerical study based on computational fluid dynamics showed the existence of an unrealistic virtual entropy generation at a high mass leakage rate. Finally, the new criterion was used in the evaluation of leakage available in the literature. These results could be useful for leakage control or industry criteria design in the future. View Full-Text
Share & Cite This Article
Zhang, Z.; Drapaca, C.; Zhang, Z.; Zhang, S.; Sun, S.; Liu, H. Leakage Evaluation by Virtual Entropy Generation (VEG) Method. Entropy 2018, 20, 14.
Zhang Z, Drapaca C, Zhang Z, Zhang S, Sun S, Liu H. Leakage Evaluation by Virtual Entropy Generation (VEG) Method. Entropy. 2018; 20(1):14.Chicago/Turabian Style
Zhang, Zhichao; Drapaca, Corina; Zhang, Zhifeng; Zhang, Shuaifang; Sun, Shimei; Liu, Hui. 2018. "Leakage Evaluation by Virtual Entropy Generation (VEG) Method." Entropy 20, no. 1: 14.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.