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Title of Journal: Acta Mech Sin

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Abbravation: Acta Mechanica Sinica

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Springer Berlin Heidelberg

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DOI

10.1007/jhep07(2011)122

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1614-3116

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Investigation of scale effect for the computation

Authors: Lin Lin YanYing Wang
Publish Date: 2013/10/26
Volume: 29, Issue: 5, Pages: 641-648
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Abstract

In order to investigate the scale effect of turbulent flow around a circular cylinder two similarity numbers criteria based on turbulent kinetic and dissipation rates associated with the fluctuation characteristics of turbulence wake are deduced by analyzing the Reynolds averaged NavierStokes equations RANS The RNG kɛ models and finite volume method are used to solve the governing equations and the secondorder implicit time and upwind space discretization algorithms are used to discrete the governing equations A numerical computation of flow parameters around a twodimensional circular cylinder with Reynolds numbers ranging from 102 to 107 is accomplished and the result indicates that the fluctuation of turbulence flow along the center line in the wake of circular cylinder can never be changed with increasing Reynolds numbers when Re ⩾ 3 × 106 This conclusion is useful for controlling the scale of numerical calculations and for applying model test data to engineering practice

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