Yevhen Semenenko, Tetіana Demchenko, Artyom Pavlichenko. Calculation of the maximum velocity of gravity flow in the pond-clarifier with higher aquatic plants

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Parent Category: Geo-Technical Mechanics, 2020

Category: Geo-Technical Mechanics, 2020, Issue 155

Geoteh. meh. 2020, 155, 88-95

https://doi.org/10.1051/e3sconf/202016800061

 

CALCULATION OF THE MAXIMUM VELOCITY OF GRAVITY FLOW IN THE POND-CLARIFIER WITH HIGHER AQUATIC PLANTS

¹Yevhen Semenenko, ¹Tetіana Demchenko, ²Artyom Pavlichenko

¹Institute of Geotechnical Mechanics named by N. Poljakov of National Academy of Sciences of Ukraine, ²National Technical University "Dnipro Polytechnic"

 Language: English

Abstract. The analysis of the possible maximum fluid flow rates when using higher aquatic plants for clarification of recycled water in the pond-clarifier of the tailing pond has carried out. The study has been performed on the basis of a mathematical model of a plane slow stationary gravity flow of a viscous fluid in two parallel layers. The results of the study made it possible to determine the fluid velocity through a layer of higher aquatic plants floating on a free surface. The maximum possible velocity depending on the layer porosity has been determined. This value is necessary to determine the rational parameters of the process of clarifying technical recycled water from particles of the given hydraulic size, taking into account the pond-clarifier geometric dimensions.  It is shown that the velocity in the layer with higher aquatic plants has been determined by the ratio of two parameters of this layer - porosity and dimensionless resistance coefficient. It has been shown that the maximum velocity value coefficient in the layer with plants floating on free surface depends only on porosity of this layer and does not depend on its resistance coefficient.

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