Numerical investigation on dissolved oxygen destratification under the coexistence of planar water jet and regular wave

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Abstract
The dissolved oxygen concentration (DOC) and its vertical distribution are essential to ensuring seawater quality and fish growth. In this study, a two-dimensional (2D) numerical model consisting of a numerical water tank and dissolved oxygen (DO) transport is conducted to investigate the DO destratification process under the coexistence of a planar water jet and regular waves. The effects of the wave and jet parameters are analyzed using the destratification ratio (DR) of the DOC, as well as the stratification index at the initial time (SI0) and sampling time (SI1). It was found that SI1 decreases and DR increases as the wave height increases and the DOC of the injected water decreases. As the wave period increases, SI1 first decreases and then increases, and DR exhibits the opposite trend. Both SI1 and DR increase with increasing SI0. A symbolic regression algorithm is used to obtain an empirical equation for predicting DR with relatively high accuracy.
Funding Information
  • National Natural Science Foundation of China (52271295)
  • National Natural Science Foundation of China (51879251)

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