Truncated method of characteristics for quasi-two-dimensional water hammer model

Korbar, Radoslav and Virag, Zdravko and Šavar, Mario (2014) Truncated method of characteristics for quasi-two-dimensional water hammer model. = Truncated method of characteristics for quasi-two-dimensional water hammer model. Journal of Hydraulic Engineering, 140 (6). ISSN 0733-9429. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. Kvartili JCR: Q1 (2014). Točan broj autora: 3.

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A new and efficient variant of the method of characteristics for solving the quasi-two-dimensional water hammer model is proposed. The method requires the fully implicit discretization scheme for radial velocity, to eliminate this velocity from the equations for axial velocity and piezometric head. As the radial velocity is typically outside the scope of interest, the computation time is reduced by omitting its calculation. The proposed method is compared with an existing method by means of two water hammer benchmark tests. The results of the two methods practically match, but the proposed method requires approximately 50 less CPU time for the laminar flow test, and 30 for the turbulent one. In addition, the numerical accuracy of four implicit interpolation schemes is compared for the case of laminar flow. The obtained results suggest that the required fully implicit discretization is not a significant limitation of the proposed method. The new method offers high numerical efficiency, while retaining all merits of the existing method. © 2014 American Society of Civil Engineers.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): Benchmarking; Laminar flow; Pipe flow; Velocity; Water hammer; Discretization scheme; Interpolation schemes; Method of characteristics; Numerical efficiency; Pie- zometric Head; Transient flow; Two-dimensional (2-D) model; Water-hammer model; Numerical methods
Subjects: TECHNICAL SCIENCE > Civil engineering
TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 1400 Department of fluid mechanics > 1410 Chair of computer fluid mechanics
Indexed in Web of Science: Yes
Indexed in Current Contents: Yes
Quartiles: Q1 (2014)
Date Deposited: 01 Jun 2015 09:01
Last Modified: 29 May 2017 12:29

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