Devised numerical criteria for calculating the density diffusion in a water reservoir

Autor: T. Kuroki, M. Kanoh
Rok vydání: 2011
Předmět:
Zdroj: Boundary Elements and Other Mesh Reduction Methods XXXIII.
ISSN: 1743-355X
1746-4064
DOI: 10.2495/be110061
Popis: In an earlier study to numerically represent the phenomenon described below, we proposed the density diffusion caused by the liquid density , the gravity acceleration g, and the time increment t. During field studies, an attempt was made to ameliorate the concentration of oxygen in the lower layer of a few water reservoirs by using a machine that supplies dissolved oxygen (DO), which led to reports of a phenomenon in which the distance reached by the DO-rich water was more than 300 metres despite the very low velocity of the water flow In this report, we investigate the numerical criteria for calculating the density diffusion in a water reservoir by using two-dimensional convective-diffusion equations. Using the signs of the space division hs), the time increment kt), the diffusion parameter  (= D*k/(h) 2 ), and the Curant number Cr (= V*k/h), we discuss the order estimate for calculating the density diffusion.
Databáze: OpenAIRE
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