V.M.Kushnir, S.V.Fedorov Nonstationary viscous flow around pipeline situated near a bottom surface |
Applied hydromechanics, Vol. 6 (78) ¹ 3, (2004) |
| The boundary values problem of the interaction between field of the surface gravity waves with the underwater pipeline at arbitrary gap between seabed surface and pipeline is considered. The time-dependent viscous flow and linear waves of small amplitudes approach (Airy waves) are used. The numeral calculations for wave velocities, the drag and lifting hydrodynamic forces, acting on the pipeline at different values of the wave perturbation phases and relative gap between pipeline and seabed surface are carried out. The numeral calculations are shown a good coincidence of the calculated hydrodynamic coefficients with laboratory tests [1] at Keulegan-Carpenter numbers, K, corresponded to advanced turbulence (K > 5). |
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| TEXT LANGUAGE: Russian |