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DOI: https://doi.org/10.4491/eer.2017.031
Numerical simulation of advection-diffusion mechanisms on flow in waste stabilization ponds (1-D) with finite difference method forward time central space scheme
Gitta Agnes Putri, and Susilo Hariyanto
Department of Mathematics, Faculty of Science and Mathematics, Diponegoro University, Semarang 50275, Indonesia
Corresponding Author: Gitta Agnes Putri ,Tel: +62-8524-7412957 , Email: gitta.agnes@yahoo.com
Received: March 9, 2017;  Accepted: April 20, 2018.
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This paper presents the numerical simulation of advection-diffusion mechanism of BOD concentration which was used as an indicator of waste only in one flow-direction of waste stabilization ponds (1-dimension (1-D)). This model was represented in partial differential equation order 2. The purpose of this paper was to determine the simulation of the model 1-D of wastewater transport phenomena based advection-diffusion mechanism and did validate the model. Numerical methods which was used for the solution of this model is finite difference method with Forward Time Central Space scheme. The simulation results which was obtained would be compared with field observation data as a validation model. Collection of field data was carried out in the Wastewater Treatment Plant Sewon, Bantul, D.I. Yogyakarta. The results of numerical simulations were indicate that the advection-diffusion mechanism takes place continuously over time. Then validation of the model was state that there was a difference between the calculation results with the field data, with a correlation value of 0.998.
Keywords: Advection-diffusion | Finite difference | FTCS | 1-dimension
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