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http://dx.doi.org/10.3795/KSME-B.2006.30.10.966

Numerical Simulation of Developing Turbulent Flow in a Circular Pipe of 180° Bend  

Myong Hyon-Kook (국민대학교 기계자동차공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.10, 2006 , pp. 966-972 More about this Journal
Abstract
A numerical simulation is performed fur developing turbulent flow in a strongly curved 180 deg pipe and its downstream tangent by a new solution code(PowerCFD) which adopts an unstructured cell-centered method. The governing equations are discretized as the full elliptic from of the equations of motion. Three typical two-equation turbulence models of low-Reynolds-number form are used to approximate the turbulent stress field. Solutions fur both streamwise and circumferential velocity components are compared with the experimental data by Azzola et at.(1986). The ${\kappa}-{\omega}$ model by Wilcox(1988) is found to give better prediction performance than the other two. Predicted secondary velocities and streamwise velocity component contours at sequential longitudinal stations are also presented in order to enable a detailed description of the complete flow. It is also found that, in the bend both mean streamwise and secondary velocities never achieve a fully-developed state and the code is capable of producing very well the complex nature of steady flow in a strongly curved pipe.
Keywords
Turbulent Flow; $180^{\circ}$ Bend; Turbulence Model; Numerical Simulation; Unstructured Cell-Centered Method;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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