Three-dimensional streamline visualization method for groundwater flow field
A groundwater flow, three-dimensional technology, applied in the processing of 3D images, image data processing, instruments, etc., can solve the problems of discontinuous tangential flow velocity weighting at the medium boundary, unbalanced local area, discontinuous vertical flow velocity at the unit boundary, etc.
Inactive Publication Date: 2016-03-02
CHINA UNIV OF MINING & TECH (BEIJING)
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However, there are three problems in the accuracy of the groundwater velocity field calculated based on the finite element method: the discontinuity of the vertical flow velocity at the cell boundary, the discontinuity of the weighted tangential flow velocity at the medium boundary, and the imbalance in the local area, which seriously limits the accuracy of the flow field based on the finite element method. The development of visualization technology
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[0066] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0067] Refer to attached figure 1 , is a schematic flowchart of the three-dimensional streamline visualization method of the groundwater flow field provided by the present invention. As an embodiment of the present invention, the three-dimensional streamline visualization method of the groundwater flow field includes the following steps:
[0068] Step 101: using the triangular prism continuous Galerkin finite element method to solve the groundwater flow numerical model, forming the original triangular prism unit grid and obtaining groundwater head field data.
[0069] The numerical model of groundwater is an approximate mathematical model established by using computer technology to divide the conceptual model of groundwa...
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The invention discloses a three-dimensional streamline visualization method for a groundwater flow field. The method comprises steps: a tri-prism continuous Galerkin finite element method is used for solving a groundwater flow numerical model, an original tri-prism element mesh is formed, and water head field data of the groundwater are acquired; the original tri-prism element mesh is refined to form a local equilibrium domain; the boundary flow value of the local equilibrium domain is calculated; a boundary flow value of a sub tri-prism element is calculated; a velocity field inside the sub tri-prism element is calculated; and particle tracking algorithm is used to acquire the three-dimensional streamline of the groundwater flow field. The method of the invention is obtained based on a high-precision groundwater velocity field and the particle tracking algorithm. As for calculation of the groundwater velocity field, the method not only considers continuity and local equilibrium of element boundary vertical velocity but also considers change rules of medium boundary tangential velocity, thereby ensuring rationality and accuracy of the three-dimensional streamline, and truly depicting movement characteristics such as supplementation, runoff and drainage of groundwater.
Description
technical field [0001] The invention relates to the technical field of groundwater calculation, in particular to a three-dimensional streamline visualization method of a groundwater flow field. Background technique [0002] Because groundwater exists in the stratum voids below the ground, humans cannot directly observe it. Only through hydrogeological exploration and groundwater dynamic monitoring can its occurrence conditions and movement laws be revealed. Affected by exploration funds, the layout density of hydrogeological exploration holes is limited, and there are large errors in the understanding of regional hydrogeological conditions. However, whether it is to study the occurrence law of groundwater, to exploit groundwater sustainably, to study the migration of pollutants in the groundwater system, or to study the safety of water inrush during excavation of underground engineering, it is necessary to analyze the effects of groundwater movement. The flow field has a fu...
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IPC IPC(8): G06T15/10
Inventor 武强赵颖旺徐华
Owner CHINA UNIV OF MINING & TECH (BEIJING)