Mohsin, Z., Sulaiman, Z. (2023). Application of the Method of Characteristics with Unsteady Friction Model for Numerical Modeling of Transient Flow Induced by Valve Closure. Alustath, 28(2), 209-225. doi: 10.33899/rengj.2023.140924.1262
Zakariya Zainel Mohsin; Zeyad Ayoob Sulaiman. "Application of the Method of Characteristics with Unsteady Friction Model for Numerical Modeling of Transient Flow Induced by Valve Closure". Alustath, 28, 2, 2023, 209-225. doi: 10.33899/rengj.2023.140924.1262
Mohsin, Z., Sulaiman, Z. (2023). 'Application of the Method of Characteristics with Unsteady Friction Model for Numerical Modeling of Transient Flow Induced by Valve Closure', Alustath, 28(2), pp. 209-225. doi: 10.33899/rengj.2023.140924.1262
Mohsin, Z., Sulaiman, Z. Application of the Method of Characteristics with Unsteady Friction Model for Numerical Modeling of Transient Flow Induced by Valve Closure. Alustath, 2023; 28(2): 209-225. doi: 10.33899/rengj.2023.140924.1262

Application of the Method of Characteristics with Unsteady Friction Model for Numerical Modeling of Transient Flow Induced by Valve Closure

Al-Rafidain Engineering Journal (AREJ)
Volume 28, Issue 2, September 2023, Pages 209-225    PDF (5.56 M)
Document Type: Research Paper
DOI: 10.33899/rengj.2023.140924.1262
Authors
Zakariya Zainel Mohsin* 1; Zeyad Ayoob Sulaiman2
1University Presidency, University of Telafer, Ninveh, Iraq
2Dams and Water Resources Engineering Department, Collage of Engineering, University of Mosul, Mosul, Iraq
Abstract
The paper presents a comprehensive methodology for simulating transient flow in pipeline systems induced by valve closure, using the method of characteristics with an unsteady friction model. The research focuses on the instantaneous acceleration-based (IAB) model, a mathematical model employed to describe water hammer behavior in pipeline systems. The methodology includes the development of a mathematical model based on governing fluid dynamics equations, numerical simulation using the proposed model, and validation against experimental data obtained from laboratory-scale pipelines. The study compares the performance of steady and unsteady friction models, revealing the limitations and strengths of each in simulating water hammer events. The paper also discusses the estimation of the damping coefficient (k) using trial-and-error and Reddy's analytical method, and the influence of numerical parameters on the IAB model performance. The numerical results demonstrate good agreement with experimental data, validating the proposed model's accuracy. The methodology presented in this paper can serve as a valuable tool for analyzing and designing pipeline systems subject to water hammer phenomena. It provides insights into transient flow characteristics induced by valve closure and assists in identifying appropriate mitigation measures to prevent damage to the pipeline system.
Keywords
Method of Characteristic; Water Hammer; Unsteady Friction; Numerical Modeling
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