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CFD ANALYSIS FOR ANAEROBIC DIGESTION INSIDE A BATCH DIGESTER AUGMENTED WITH EXTENDED SURFACES

Ammar Hassan Soheela,*,†, Johain J. Farajb, Fawizea M. Hussienb

a Technical Engineering College/Mosul, Northern Technical University, Mosul, 41001, Iraq
b Technical Engineering College/Baghdad, Middle Technical University, Baghdad, 41001, Iraq
* Currently in PhD study at Middle Technical University, Baghdad, 41001, Iraq
† Corresponding author. Email: ammarsuhail@ntu.edu.iq & abc0023@mtu.edu.iq

Frontiers in Heat and Mass Transfer 2023, 20, 1-11. https://doi.org/10.5098/hmt.20.3

Abstract

The household batch reactor using cow manure as the substrate generates methane gas used as fuel. This paper presents two-dimensional (3D) axisymmetric using commercial COMSOL 5.5 Multiphysics software. This is a computational fluid dynamics (CFD) model based on conservation equations with the chemical reaction model of anaerobic digestion (AD) processes to investigate the influence of different horizontal circular extended surfaces augmented to the inside digesters on the performance of the anaerobic digestion. Using four batch digesters, D1 with no extended surfaces and D2, D3, and D4 have augmented with four horizontal circular extended surfaces of width 2,4 and 6 cm, respectively. The numerical results showed that the cow manure's velocity distribution depends on the chemical reaction's heat, which produces natural convection currents. Furthermore, the temperature and species profiles of the anaerobic digestion process depended on the extended surface area. The D4 has a maximum methane molar concentration, augmented with a higher extended surface area than other digesters. Simulation results agreed with the experimental literature results of various anaerobic digestion processes: for all cases, the mean absolute present error (MAPE) was less than 10%, which is acceptable.

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APA Style
Soheel, A.H., Faraj, J.J., Hussien, F.M. (2023). CFD ANALYSIS FOR ANAEROBIC DIGESTION INSIDE A BATCH DIGESTER AUGMENTED WITH EXTENDED SURFACES. Frontiers in Heat and Mass Transfer, 20(1), 1-11. https://doi.org/10.5098/hmt.20.3
Vancouver Style
Soheel AH, Faraj JJ, Hussien FM. CFD ANALYSIS FOR ANAEROBIC DIGESTION INSIDE A BATCH DIGESTER AUGMENTED WITH EXTENDED SURFACES. Front Heat Mass Transf. 2023;20(1):1-11 https://doi.org/10.5098/hmt.20.3
IEEE Style
A.H. Soheel, J.J. Faraj, and F.M. Hussien "CFD ANALYSIS FOR ANAEROBIC DIGESTION INSIDE A BATCH DIGESTER AUGMENTED WITH EXTENDED SURFACES," Front. Heat Mass Transf., vol. 20, no. 1, pp. 1-11. 2023. https://doi.org/10.5098/hmt.20.3



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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