Boundary Element Method For The Analysis Of
Flow And Concentration In A Water Reservoir
Author(s)
M. Kanoh, N. Nakamura, T. Kuroki & K. Sakamoto
Abstract
In an earlier study, a boundary element method (BEM) and a weighted finite
difference method (WFDM) were combined to analyse the flow in a water
reservoir. In this paper, the BEM is developed to obtain numerically stable and
convergent results for the water flow and concentration distribution in the water
reservoir. In order to apply the BEM to the problem, three techniques were used.
(1) The first is the penalty method, in which the pressure terms are eliminated in
the Navier-Storks equations for the BEM. (2) The second involves taking the
uniform velocity into the basic solution in both the flow and concentration
distribution analyses of our BEM. (3) The third is to identify the kinetic and
dynamic conditions for pressure against the vertical wall or the bottom and on
the free surface of the reservoir because it is necessary to ascertain the pressure
conditions in case that the penalty method is not used. Referring to the velocity
vectors of the water flow that are calculated by the WFDM and observed in the
model simulation of a water reservoir constructed in our laboratory, the effect
and accuracy of the alternative BEM are estimated.
Keywords: flow and concentration in a water reservoir, weighted finite
difference method, observed velocity in a model simulation of a water reservoir,
kinetic and dynamic conditions for pressure.
1 Introduction
A poor-oxygen layer, which is short of or lacking in dissolved oxygen (DO),
often appears in the lower regions of water reservoirs in summer. The pooroxygen
condition results in the solving of heavy metals and phosphorous from
Keywords
flow and concentration in a water reservoir, weighted finite
difference method, observed velocity in a model simulation of a water reservoir,
kinetic and dynamic conditions for pressure.
Related Book
Other papers in this volume
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