Some notes on numerical investigation of three cavitation models through a verification and validation procedure

• Published in: Journal of hydrodynamics. Series B Vol. 35; no. 1; pp. 185 - 190
• Main Authors: Deng, Lin-feng, Long, Yun, Cheng, Huai-yu, Ji, Bin
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.02.2023
• Subjects: Engineering; Engineering Fluid Dynamics; Hydrology/Water Resources; Letter; Numerical and Computational Physics; Simulation; error estimate; cavitation model; Cavitating flow; verification and validation (V&V)
• DOI: 10.1007/s42241-023-0001-7
• ISSN: 1001-6058

The present paper investigates the turbulent cavitating flow around the Clark-Y hydrofoil with special emphasis on the influence of cavitation models by verification and validation (V&V) method. RANS solver coupled with the three major cavitation models (i.e., Zwart-Gerber-Belamri, Schnerr and Sauer and full cavitation model, which are abbreviated to ZGB model, SS model and FC model respectively) is employed in this paper. The results indicate that the three cavitation models can properly reproduce the cavitation evolutions. ZGB model and SS model give better prediction in the overall cavitation patterns. FC model exhibits an obvious under-estimation for the sheet cavity, and the predicted volume fraction is closely related to the turbulent flow. The verification and validation procedure is involved to quantitatively assess the accuracy of these three cavitation models. It is indicated that the V&V procedure is suitable for the unsteady cavitating flow. The errors estimate is robust and conservative within the cavitation region, while gets closer to zero in the no-cavitation region. In addition, ZGB model exhibits the highest overall accuracy among the three models, which further verifies its wide applicability.