Multiscale hydrodynamic coupling method based on fvcom and openfoam models

Abstract

The invention discloses a multi-scale hydrodynamic coupling method based on FVCOM and OpenFOAM models, including the FVCOM model relying on medium-scale coarse resolution two-dimensional unstructured grids to simulate three-dimensional layered flow information, and the OpenFOAM model relying on small-scale fine resolution The grid simulates the full three-dimensional fine flow information; based on the initial water level field and the instantaneous value of the tidal boundary in the outer domain, the FVCOM model is used to calculate the three-dimensional layered tidal current field in the outer domain, and the tidal current data at the centroid of each grid is obtained by combining the three-line interpolation method; The adjacent point interpolation method first transfers the three-dimensional layered power flow data from the unstructured grid centroid to the structured grid node in the middle of the fusion area, and then further transfers it to the OpenFOAM boundary node of the inner domain model; to reach the inner domain model The tidal current data at the boundary is used as the initial value, and the result of the interaction between the tidal current and the marine structure is obtained through calculation, and the splashing and impact of the water body caused by the large-scale marine dynamics near the structure are analyzed.

Description

technical field [0001] The invention relates to the technical field of multi-scale calculation of the interaction between tidal currents and marine structures, specifically a multi-scale hydrodynamic coupling method based on FVCOM and OpenFOAM models. Background technique [0002] In recent years, marine disasters have occurred frequently, and the loss of life and property in coastal areas has been serious. As an evaluation and prediction tool, numerical simulation technology can effectively simulate the occurrence process and results of marine disasters. However, ocean tidal wave motion belongs to large / mesoscale or mesoscale motion, which becomes small-scale or micro-scale motion when it acts on marine structures. The scale is 0.1~10m. At present, single-scale numerical simulation technology cannot analyze in detail the water movement caused by the local large-scale ocean dynamics of the structure, and describe physical phenomena such as water splashing and impact on the ...

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Problems solved by technology

At present, single-scale numerical simulation technology cannot analyze in detail the water movement caused by the local large-scale ocean dynamics of the structure, and describe physical phenomena such as water splashing and impact on the surface of the structure.

For example, the single use of FVCOM model numerical simulation technology can simulate and calculate large / mesoscale or mesoscale ocean current movement, and has good results, but it cannot accurately simulate the small-scale or micro-scale ocean currents when they act on marine structures. Eddy current motion; single use of OpenFOAM model numerical simulation technology can simulate local eddy current motion of marine structures, and has high calculation accuracy, but cannot quickly simulate large / mesoscale or mesoscale ocean current motion

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