E3S Web Conf.
Volume 102, 2019Mathematical Models and Methods of the Analysis and Optimal Synthesis of the Developing Pipeline and Hydraulic Systems 2019
|Number of page(s)||7|
|Section||Methods of Analysis of Pipeline Systems|
|Published online||14 June 2019|
Steady flows and unsteady ones in pipes: models link and quasistationarity hypothesis
NB IWEP SB RAS, 2, Morskoy Ave, 2, Novosibirsk, 630090, Russian Federation
* Corresponding author: firstname.lastname@example.org
Models of unsteady flows and stationary ones in pipes and the requirements of their joining are considered. In this view, the problem of the description of a friction at a non-stationary flow is considered. So-called “quasi-stationarity hypothesis” is discussed. The formula for a friction coefficient generalized on a non-stationary case is offered. It is concluded that additional losses at the non-stationary mode are caused by energy consumptions for reorganization of speed chart.
© The Authors, published by EDP Sciences, 2019
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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