A STUDY ON THE EFFECT OF THE VOF SCHEME ON NUMERICAL DIFFUSION IN THE COMPUTATIONAL SIMULATION AROUND A HIGH-SPEED VESSEL

M.G. Sim; M. Lee; S.B. Lee

doi:10.6112/kscfe.2024.29.4.270

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Original Article

A STUDY ON THE EFFECT OF THE VOF SCHEME ON NUMERICAL DIFFUSION IN THE COMPUTATIONAL SIMULATION AROUND A HIGH-SPEED VESSEL 고속선 주위 유동 해석에서 VOF의 차분 기법이 수치 확산에 미치는 영향에 관한 연구

31 December 2024. pp. 270-280

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Abstract

Computational simulations around a mono-hull planing vessel were performed to investigate the effects of time step size and the accuracy of VOF scheme on the numerical diffusion of phase interface. By evaluating the convergence index for the time step size, it was shown that increasing the time step size results in numerical diffusion, which in turn can impact the accuracy of the computational solution. To systematically assess the effects of the numerical diffusion, simulations were conducted across various flow speeds and time step sizes. The results revealed that numerical diffusion at the free surface interface leads to changes in viscosity and density, which subsequently influence the total resistance acting on the hull. The accuracy of the difference schemes for the VOF variable was analyzed based on the interpolation between first-order upwind and higher-order schemes, determined by setting the upper and lower limits for the Courant number(Co), respectively.

Keywords

High-speed vessel

Mono-hull planing vessel

Volume of fluid

Numerical diffusion

키워드

고속선

단동활주선

유체 체적

수치 확산

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Information

Publisher :Korean Society for Computational Fluids Engineering
Publisher(Ko) :한국전산유체공학회
Journal Title :Journal of Computational Fluids Engineering
Journal Title(Ko) :한국전산유체공학회지
Volume : 29
No :4
Pages :270-280
Received Date : 2024-10-17
Revised Date : 2024-11-19
Accepted Date : 2024-11-20
DOI :https://doi.org/10.6112/kscfe.2024.29.4.270

Journal of Computational Fluids Engineering ISSN:1598-6071(Print) 3022-6252(Online) 한국전산유체공학회지

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