年間 18 号発行
ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561
Indexed in
ESTIMATION OF THE LOSS COEFFICIENT FOR CONDUIT BENDS WITH CIRCULAR CROSS SECTION BY THE SECOND LAW APPROACH
要約
Energy loss in a flow field occurs due to the dissipation of mechanical energy, and an accurate estimation of the loss coefficient is important for both energy conservation and engineering design. In the current study, the concept of the head loss coefficient K of a local structure for turbulent flows was extended to a laminar flow. The thermodynamic definition of K is proposed, and the value of K can be simulated by integrating the entropy production of the flow field. The Re dependence of K for a 90° bend with a circular cross section and 90° bend combinations was investigated using the second law approach. In addition, the correlation between K and the bending curvature was also derived.
-
Soto-Francés Víctor-Manuel, Pinazo-Ojer José-Manuel, Sarabia-Escrivá Emilio-José, Martínez-Beltrán Pedro-Juan, On using the minimum energy dissipation to estimate the steady-state of a flow network and discussion about the resulting power-law:application to tree-shaped networks in HVAC systems, Energy, 172, 2019. Crossref
-
Zhang Dong, Zhang Hao-Chun, Li Zeng-En, Wang Qi, Sun Wen-Bo, Investigation on entropy generation and flow characteristics of 7-pin sodium cooled wrapped-wire fuel bundle, International Communications in Heat and Mass Transfer, 137, 2022. Crossref