@Article{hmt.20.3,
AUTHOR = {Ammar Hassan Soheel, Johain J. Faraj, Fawizea M. Hussien},
TITLE = {CFD ANALYSIS FOR ANAEROBIC DIGESTION INSIDE A BATCH  DIGESTER AUGMENTED WITH EXTENDED SURFACES},
JOURNAL = {Frontiers in Heat and Mass Transfer},
VOLUME = {20},
YEAR = {2023},
NUMBER = {1},
PAGES = {1--11},
URL = {http://www.techscience.com/fhmt/v20n1/52365},
ISSN = {2151-8629},
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.},
DOI = {10.5098/hmt.20.3}
}