Devised Numerical Criteria For Calculating The
Density Diffusion In A Water Reservoir
Author(s)
M. Kanoh & T. Kuroki
Abstract
In an earlier study to numerically represent the phenomenon described below, we
proposed the density diffusion caused by the liquid density ρ, the gravity
acceleration g, and the time increment Δt. 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(=Δs), the time increment
k(=Δt), the diffusion parameter Γ (= D*k/(h)2), and the Curant number
Cr (= V*k/h), we discuss the order estimate for calculating the density diffusion.
Keywords
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