Effect of Grid Geometry on Turbulence Decay

AIP Publishing - Tập 10 Số 6 - Trang 1216-1224 - 1967
Mahinder S. Uberoi1,2, Stanley Wallis1
1Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado
2Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado

Tóm tắt

Longitudinal and lateral turbulence intensities u2¯ and v2¯ are measured behind homogeneous grids of various geometries. For all grids used, the ratio u2¯/v2¯ is essentially constant during decay and lies between 1.2 and 1.35, depending on the grid geometry. The turbulence intensity u2¯∼t−n where n is constant during decay but depends on the grid geometry and varies from 1.22 to 1.48. This implies that the rate of decay depends on the initial energy spectrum and the energy-containing (large) eddies maintain a similarity during decay.

Từ khóa


Tài liệu tham khảo

1966, J. Fluid Mech., 24, 539, 10.1017/S0022112066000806

1956, J. Aerospace Sci., 23, 754

1963, Phys. Fluids, 6, 1048, 10.1063/1.1706861

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AIP Publishing

Tập 10 Số 6

1216-1224

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