Modelling of Hydraulic Dynamics in Sludge Treatment Reed Beds with Moving Boundary Condition

MATEC Web of Conferences Pub Date : 2023-01-01 DOI:10.1051/matecconf/202337701013

Y. Z. Huong, Y. Tan, F. Tang, Saptoro Agus

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引用次数: 0

Abstract

The conventional method of simulation using fixed mesh method (FMM) of discretization is a well-known and trusted procedure in modelling hydraulic dynamics. However, new ideas of innovation in modelling should be advanced. The moving mesh method (MMM) has been considered as a novel approach in modelling hydraulic dynamics after depending on the existing simulation model for decades. The MMM is capable of describing the moving boundary condition of an actual wetland system due to water ponding. An idealized model should be able to simulate the actual hydraulic flows through the system with the corresponding porosity. Hence, a combination of MMM and FMM (MM-FMM) of discretization for hydraulic dynamics is studied in this project to model the flux with respect to water ponding scenario in a sludge treatment reed bed and unsaturated transient flow within the bed. Such method has evidently proved to simulate the actual hydraulic flows in contrast to conventional method. The application of MMM limits the maximum flux to keep within its saturated conductivity, thus reduces the effect of flow overprediction. Subsequently, the simulated results for hydraulic head and moisture content can be predicted for actual condition of different cases according to their respective fluxes.

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移动边界条件下污泥处理芦苇床水力动力学建模

传统的离散化固定网格法(FMM)是一种众所周知且可靠的水力动力学建模方法。然而，应该提出新的建模创新思路。几十年来，运动网格法一直依赖于现有的仿真模型，被认为是一种新的水力动力学建模方法。MMM能够描述实际湿地系统由于积水而产生的移动边界条件。理想的模型应该能够模拟具有相应孔隙率的系统的实际水力流动。因此，本项目研究了水力动力学离散化的MMM和FMM (MM-FMM)的结合，以模拟污泥处理芦苇床中积水情景和床内不饱和瞬态流动的通量。与传统方法相比，该方法能较好地模拟实际水力流动。MMM的应用限制了最大通量，使其保持在饱和电导率范围内，从而减少了流量过预测的影响。根据水头和含水率各自的通量，可以预测不同情况下实际情况的水头和含水率模拟结果。

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来源期刊

MATEC Web of Conferences

自引率

0.00%

发文量

342

审稿时长

6 weeks

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