A block coupled solver development for hydraulic machinery applications

27th IAHR Symposium on Hydraulic Machinery and Systems

Mangani, L.^1 ; Buchmayr, M.^1 ; Darwish, M.^1

Hochschule Luzern, Technik und Architektur, CH-6048 Horw, Switzerland, Andritz AG, Andritzer Reichsstrasse 68B, A-8045 Graz, Austria

Department of Thermal Turbomachinery - TU Graz, Infeldgasse 25a, A-8010 Graz, Austria Department of Mechanical Engineering, American University of Beirut, P.O. Box 11-0236, Riad El Solh, Beirut 1107 2020, Lebanon^1

关键词: Block algorithm;    Continuity equations;    Faster convergence;    High-efficiency;    Incompressible turbulent flow;    Loosely coupled;    Segregated algorithm;    Simultaneous solution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/22/2/022002/pdf
DOI  :  10.1088/1755-1315/22/2/022002

来源: IOP

【 摘 要 】

In this paper, a fully coupled block algorithm for the solution of three-dimensional incompressible turbulent flows for use in hydraulic machinery is presented. Due to the simultaneous solution of momentum and continuity equations, implicit block coupling of pressure and velocity variables leads to faster convergence in respect to classical, loosely coupled, segregated algorithms of the SIMPLE family of algorithms. Special linear solver developments were also performed in order to extend the new fully coupled solver to high efficiency HPC simulations. These modifications allow the coupled solver to retain its improved performance and robustness in addition to mesh size scalability while solving hydraulic machinery type applications.