Multi-scale hydrodynamic coupling method based on FVCOM model and OpenFOAM model

Abstract

The invention discloses a multi-scale hydrodynamic coupling method based on an FVCOM model and an OpenFOAM model. The method comprises the steps that an FVCOM model relies on a mesoscale coarse-resolution two-dimensional unstructured grid to simulate three-dimensional layered flow information, and an OpenFOAM model relies on a small-scale fine-resolution grid to simulate full-three-dimensional fine flow information; based on the water level initial field and the outer domain tide level boundary instantaneous value, an FVCOM model is used for calculating to obtain an outer domain three-dimensional layered tide flow field, and a three-line interpolation method is combined to obtain tide flow data at the mass center of each grid; by utilizing a nearest neighbor point interpolation method, firstly, three-dimensional layered tide data is transmitted from an unstructured grid centroid to an intermediate structured grid node of a fusion region, and then further the three-dimensional layered tide data is transmitted to an OpenFOAM boundary node of an internal domain model; and the tide data reaching the boundary of the inner domain model is taken as an initial value, an interaction resultof the tide and the marine structure is obtained through calculation, and water splashing and impact phenomena caused by near-zone large-scale marine power of 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 ...

AI Technical Summary

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

Images