Riparian subsurface flow zone hydrothermal coupling modeling method based on COMSOL mathematical module

Abstract

The invention discloses a riparian subsurface flow zone hydrothermal coupling modeling method based on a COMSOL mathematical module, and the method comprises the following steps: constructing a riparian subsurface flow zone hydrothermal coupling model in COMSOL software, and the riparian subsurface flow zone hydrothermal coupling model comprising a water flow motion equation, a heat migration equation, and a heat conduction coefficient empirical model; using a coefficient type partial differential equation in the COMSOL mathematical module for carrying out equivalence on a heat migration equation; importing the river bank underflow zone geometric model, and performing mesh generation on the river bank underflow zone geometric model; and calculating to obtain a riparian subsurface flow zonetemperature field. According to the riparian subsurface flow zone hydrothermal coupling modeling method based on a COMSOL mathematical module, multiple heat conductivity coefficient empirical modelscan be coupled into the hydrothermal coupling model, so that an optimal scheme is obtained, and the simulation precision of the riparian subsurface flow zone hydrothermal coupling model can be improved to a certain extent.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a water-heat coupling modeling method and system for a river bank subsurface flow zone based on a COMSOL mathematical module. Background technique [0002] The riparian hyporheic zone refers to the transition zone between surface water and groundwater in the riparian zone. It is an important place for material energy circulation and animal and plant habitat in the river, known as the "liver" of the river. At present, the riparian underflow zone has become a research hotspot in many disciplines. [0003] The exchange process between the riparian subsurface zone and the surface water of the river is always accompanied by the transfer and exchange of energy. Therefore, temperature, as an intuitive carrier of energy, is a characterization factor that can reflect the temporal and spatial changes of the exchange process. It is easy to observe and non-p...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and proposes a water-heat coupling modeling method based on the COMSOL mathematical module in the river bank subsurface flow zone, which solves the problem of using COMSOL software to transfer water and heat in the river bank subsurface flow zone in the prior art. Technical problem in not being able to take the thermal conductivity empirical model into account in the hydrothermal coupled model when simulating the process

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