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Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD

The production of energy from biomass and waste material is gaining popularity worldwide due to the expected depletion of fossil fuels shortly. A device commonly used is anaerobic digester in which microorganisms react with biomass/biodegradable in a vessel and produce useful gases. The performance...

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Main Authors: Muhammad Shakaib,, Najib, Antash, ul Haque, M. Ehtesham
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2019
Online Access:http://journalarticle.ukm.my/14812/1/03.pdf
http://journalarticle.ukm.my/14812/
http://www.ukm.my/jkukm/volume-312-2019/
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spelling my-ukm.journal.148122020-07-10T01:57:09Z http://journalarticle.ukm.my/14812/ Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD Muhammad Shakaib, Najib, Antash ul Haque, M. Ehtesham The production of energy from biomass and waste material is gaining popularity worldwide due to the expected depletion of fossil fuels shortly. A device commonly used is anaerobic digester in which microorganisms react with biomass/biodegradable in a vessel and produce useful gases. The performance of anaerobic digester depends on mixing or proper contact of bio-matter with microorganisms. In this paper, flow behaviour is studied in cylindrical vessels of anaerobic digester using Computational Fluid Dynamics (CFD) technique. The study includes simulations for various cylinder dimensions obtained by changing the height and diameter of the digester vessel and locations for fluid inlet and outlet. The results are shown in qualitative terms using velocity profiles and quantitatively in terms of volume of the stagnant zone. The comparison of several geometries at a constant velocity indicates the considerable effect of cylinder aspect ratio (height to diameter ratio) and positions and numbers of inlet and outlet ports on mixing performance. The influence of inlet velocity/Reynolds number is also examined for a few cases. The digester which has an inlet and two outlets on the curved surface (both on the same side) is found to be most suitable. The volume of the dead zone in this configuration at various Reynolds number is less than 30% (based on 0.5% criterion). Penerbit Universiti Kebangsaan Malaysia 2019-10 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/14812/1/03.pdf Muhammad Shakaib, and Najib, Antash and ul Haque, M. Ehtesham (2019) Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD. Jurnal Kejuruteraan, 31 (2). pp. 201-208. ISSN 0128-0198 http://www.ukm.my/jkukm/volume-312-2019/
institution Universiti Kebangsaan Malaysia
building Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description The production of energy from biomass and waste material is gaining popularity worldwide due to the expected depletion of fossil fuels shortly. A device commonly used is anaerobic digester in which microorganisms react with biomass/biodegradable in a vessel and produce useful gases. The performance of anaerobic digester depends on mixing or proper contact of bio-matter with microorganisms. In this paper, flow behaviour is studied in cylindrical vessels of anaerobic digester using Computational Fluid Dynamics (CFD) technique. The study includes simulations for various cylinder dimensions obtained by changing the height and diameter of the digester vessel and locations for fluid inlet and outlet. The results are shown in qualitative terms using velocity profiles and quantitatively in terms of volume of the stagnant zone. The comparison of several geometries at a constant velocity indicates the considerable effect of cylinder aspect ratio (height to diameter ratio) and positions and numbers of inlet and outlet ports on mixing performance. The influence of inlet velocity/Reynolds number is also examined for a few cases. The digester which has an inlet and two outlets on the curved surface (both on the same side) is found to be most suitable. The volume of the dead zone in this configuration at various Reynolds number is less than 30% (based on 0.5% criterion).
format Article
author Muhammad Shakaib,
Najib, Antash
ul Haque, M. Ehtesham
spellingShingle Muhammad Shakaib,
Najib, Antash
ul Haque, M. Ehtesham
Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD
author_facet Muhammad Shakaib,
Najib, Antash
ul Haque, M. Ehtesham
author_sort Muhammad Shakaib,
title Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD
title_short Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD
title_full Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD
title_fullStr Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD
title_full_unstemmed Analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using CFD
title_sort analysis of fluid flow patterns in cylindrical vessels of anaerobic digester using cfd
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2019
url http://journalarticle.ukm.my/14812/1/03.pdf
http://journalarticle.ukm.my/14812/
http://www.ukm.my/jkukm/volume-312-2019/
_version_ 1672611740234285056
score 13.211869

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