A TIME-INDEPENDENT FINITE DIFFERENCE ANALYSIS OF VISCOUS FLOW ACROSS A TRANSLATING CIRCULAR CYLINDER

Authors

Chih-Chun Chu, Department of Marine Environment and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C
Yi-Hsiang Yu, Department of Marine Environment and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.C
Bang-Fuh Chen, Department of Marine Environment and Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, R.O.CFollow
Tin-Kan Hung, Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA.

Abstract

A time-independent finite difference scheme is developed and applied to analyze the viscous flow past a translating circular cylinder. In this scheme, the instantaneous moving cylinder face is mapped to a fixed boundary and the computational domain is, therefore, time independent. Large Reynolds number and high oscillating frequency of moving cylinder are used in the analysis. The finite difference approximation and algorithm were validated by the reported numerical simulation and flow visualization. The vorticity and streamline patterns developments were described and discussed. The surface vorticity distribution and position of separation point versus phases of oscillating stages were discussed. The flow behaviors of various amplitudes of exciting velocity and frequencies of moving cylinder are simulated and compared. The in-line forces on cylinder during cylinder oscillation were calculated and are in good agreement with those predicted by Morison’s equation. The developed scheme can be extended to analyze the viscous flow passing an arbitrary moving cylinder.

Recommended Citation

Chu, Chih-Chun; Yu, Yi-Hsiang; Chen, Bang-Fuh; and Hung, Tin-Kan (2010) "A TIME-INDEPENDENT FINITE DIFFERENCE ANALYSIS OF VISCOUS FLOW ACROSS A TRANSLATING CIRCULAR CYLINDER," Journal of Marine Science and Technology: Vol. 18: Iss. 4, Article 18.
DOI: 10.51400/2709-6998.1928
Available at: https://jmstt.ntou.edu.tw/journal/vol18/iss4/18