LAMINAR-TURBULENT TRANSITION IN VIEW OF FLOW SEPARATION FROM ISOTHERMAL AND HEATED CYLINDER

被引：1
|
作者：
Pech, J. [1 ]
机构：
[1] CAS, Inst Thermomech, Dolejskova 1402-5, Prague 18200 8, Czech Republic
来源：
TOPICAL PROBLEMS OF FLUID MECHANICS 2020 | 2020年
关键词：
transition to turbulence; heated flow; cylinder flow; separation angle; Navier-Stokes-Fourier; spectral/hp element method;
D O I：
10.14311/TPFM.2020.022
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This work presents insight to the laminar-turbulent transition in flow around cylinder through a numerical simulation, both in isothermal and heated case. The flow is modelled directly as a solution to the Navier-Stokes and Navier-Stokes-Fourier system. Reynolds numbers are considered in range 100-20000, ratio of cylinder-wall and upstream temperature is up to 1.5. Curves representing evolution of separation positions in time provide novel insight to vortex formation. Various regimes are recognized and some of them can be assigned to phenomenons described formerly in experiment.
引用
收藏
页码：168 / 175
页数：8
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