Numerical Investigation of unsteady flow around a circular cylinderat different Reynolds number
سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 400
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شناسه ملی سند علمی:
ISME26_694
تاریخ نمایه سازی: 6 دی 1399
چکیده مقاله:
In the present study, unsteady flow around a circular cylinder is simulated by ANSYS-Fluent ۱۴.۰ in laminarand turbulent flow regimes. The Finite Volume Methodwith second-order equations were applied. The couplingof pressure and velocity equations solved by PISOalgorithm. The PISO algorithm is more accurate intransient flows, also it shows vortices behind of cylinderclearer than other methods. Due to the applicability of thek-ε turbulent model, it is used in this study. In thesimulation, the effects of Reynolds number’s changes onthe formation and destruction period time of vortices anddrag and lift coefficient have investigated. The resultsshowed that by increasing the Reynolds number, the timeof formation and destruction of vortices, as well as liftcoefficient has experienced a decrease. The dragcoefficient fluctuated and the overall trend wasdecreasing. It is crystal clear that the simulation resultsare in good agreement with previous results which thenumerical error of the lift and drag coefficients were lessthan ۱۰%.
کلیدواژه ها:
نویسندگان
Seyed Mahmood kia
bachelor of science student, Semnan University, Department of Mechanical Engineering;
Farhad Talebi
Asistant Professor, Semnan University, Department of Mechanical Engineering;