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- Title
具有间断解的PTT型黏弹性流体热对流数值模拟.
- Authors
张栏; 蒋子超; 陈玉惠; 张仪; 杨耿超; 姚清河
- Abstract
The study of the time information and transitional behavior of flow states in the develop‐ ment of intermittent solutions in Rayleigh-Bénard (RB) convection of viscoelastic fluids has great sig‐ nificance in understanding the flow mechanics of Phan-Thien-Tanner (PTT) viscoelastic fluid RB con‐ vection. In this paper, we first use a second-order upwind-type total variation diminishing (TVD) scheme to numerically simulate PTT viscoelastic fluid RB convection, and demonstrate the conver‐ gence and second-order accuracy of the numerical method in spatial discretization based on the compar‐ ison between the numerical and analytical solutions. The numerical results indicate that the numerical method employed in this paper can simulate the evolution of PTT viscoelastic fluid RB thermal convec‐ tion with discontinuity initial field, and provide a fundamental explanation for the transient flow phe‐ nomena of this flow up to the development of steady periodic solutions, which are consistent with the flow phenomena developed from the a priori velocity field.
- Subjects
VISCOELASTIC materials; ANALYTICAL solutions; VECTION; RAYLEIGH-Benard convection
- Publication
Acta Scientiarum Naturalium Universitatis Sunyatseni / Zhongshan Daxue Xuebao, 2023, Vol 62, Issue 5, p136
- ISSN
2097-0137
- Publication type
Article
- DOI
10.13471/j.cnki.acta.snus.2023D008