EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Journal of Chemical Engineering |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322018000401333 |
Resumo: | ABSTRACT The process of solid circulation in an internally circulating fluidized bed (ICFB) having two or more chambers can be developed by applying unequal gas velocities in these chambers. Such a process is beneficial to several applications and provides the means for the energy transfer between the chambers in the ICFB. In this paper, a multi-fluid CFD model incorporating the kinetic theory of granular flow is used to simulate the hydrodynamic characteristics of a binary mixture of particles in an ICFB using ANSYS-Fluent software. The mixture is composed of two particles of different sizes but the same densities. The ICFB has two chambers named the reaction chamber (RC) and the heat exchange chamber (HEC), separated by a vertical central baffle. An increase in the RC gas velocity UR at constant HEC gas velocity UH results in an increase in the circulation rate of the binary mixture. The circulation rate of small particles GBs is found to be higher than that of the big particles GBb. Increasing the slot size causes a decrease in the pressure difference between the chambers and consequently decreasing the solid circulation rate in the ICFB. The mixture circulation rate also decreases when the mixture is richer in GBb particles than in GBs. |
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Brazilian Journal of Chemical Engineering |
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EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BEDSimulationsKinetic theory of granular flowCFDSolid circulation ratePressure differenceABSTRACT The process of solid circulation in an internally circulating fluidized bed (ICFB) having two or more chambers can be developed by applying unequal gas velocities in these chambers. Such a process is beneficial to several applications and provides the means for the energy transfer between the chambers in the ICFB. In this paper, a multi-fluid CFD model incorporating the kinetic theory of granular flow is used to simulate the hydrodynamic characteristics of a binary mixture of particles in an ICFB using ANSYS-Fluent software. The mixture is composed of two particles of different sizes but the same densities. The ICFB has two chambers named the reaction chamber (RC) and the heat exchange chamber (HEC), separated by a vertical central baffle. An increase in the RC gas velocity UR at constant HEC gas velocity UH results in an increase in the circulation rate of the binary mixture. The circulation rate of small particles GBs is found to be higher than that of the big particles GBb. Increasing the slot size causes a decrease in the pressure difference between the chambers and consequently decreasing the solid circulation rate in the ICFB. The mixture circulation rate also decreases when the mixture is richer in GBb particles than in GBs.Brazilian Society of Chemical Engineering2018-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322018000401333Brazilian Journal of Chemical Engineering v.35 n.4 2018reponame:Brazilian Journal of Chemical Engineeringinstname:Associação Brasileira de Engenharia Química (ABEQ)instacron:ABEQ10.1590/0104-6632.20180354s20170083info:eu-repo/semantics/openAccessHassan,M.Lu,H.Liu,G.Wang,S.Rafique,M.eng2019-03-26T00:00:00Zoai:scielo:S0104-66322018000401333Revistahttps://www.scielo.br/j/bjce/https://old.scielo.br/oai/scielo-oai.phprgiudici@usp.br||rgiudici@usp.br1678-43830104-6632opendoar:2019-03-26T00:00Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ)false |
dc.title.none.fl_str_mv |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED |
title |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED |
spellingShingle |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED Hassan,M. Simulations Kinetic theory of granular flow CFD Solid circulation rate Pressure difference |
title_short |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED |
title_full |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED |
title_fullStr |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED |
title_full_unstemmed |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED |
title_sort |
EULERIAN-EULERIAN SIMULATIONS OF THE HYDRODYNAMICS OF A BINARY MIXTURE IN AN INTERNALLY CIRCULATING FLUIDIZED BED |
author |
Hassan,M. |
author_facet |
Hassan,M. Lu,H. Liu,G. Wang,S. Rafique,M. |
author_role |
author |
author2 |
Lu,H. Liu,G. Wang,S. Rafique,M. |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Hassan,M. Lu,H. Liu,G. Wang,S. Rafique,M. |
dc.subject.por.fl_str_mv |
Simulations Kinetic theory of granular flow CFD Solid circulation rate Pressure difference |
topic |
Simulations Kinetic theory of granular flow CFD Solid circulation rate Pressure difference |
description |
ABSTRACT The process of solid circulation in an internally circulating fluidized bed (ICFB) having two or more chambers can be developed by applying unequal gas velocities in these chambers. Such a process is beneficial to several applications and provides the means for the energy transfer between the chambers in the ICFB. In this paper, a multi-fluid CFD model incorporating the kinetic theory of granular flow is used to simulate the hydrodynamic characteristics of a binary mixture of particles in an ICFB using ANSYS-Fluent software. The mixture is composed of two particles of different sizes but the same densities. The ICFB has two chambers named the reaction chamber (RC) and the heat exchange chamber (HEC), separated by a vertical central baffle. An increase in the RC gas velocity UR at constant HEC gas velocity UH results in an increase in the circulation rate of the binary mixture. The circulation rate of small particles GBs is found to be higher than that of the big particles GBb. Increasing the slot size causes a decrease in the pressure difference between the chambers and consequently decreasing the solid circulation rate in the ICFB. The mixture circulation rate also decreases when the mixture is richer in GBb particles than in GBs. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322018000401333 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-66322018000401333 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0104-6632.20180354s20170083 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Brazilian Society of Chemical Engineering |
publisher.none.fl_str_mv |
Brazilian Society of Chemical Engineering |
dc.source.none.fl_str_mv |
Brazilian Journal of Chemical Engineering v.35 n.4 2018 reponame:Brazilian Journal of Chemical Engineering instname:Associação Brasileira de Engenharia Química (ABEQ) instacron:ABEQ |
instname_str |
Associação Brasileira de Engenharia Química (ABEQ) |
instacron_str |
ABEQ |
institution |
ABEQ |
reponame_str |
Brazilian Journal of Chemical Engineering |
collection |
Brazilian Journal of Chemical Engineering |
repository.name.fl_str_mv |
Brazilian Journal of Chemical Engineering - Associação Brasileira de Engenharia Química (ABEQ) |
repository.mail.fl_str_mv |
rgiudici@usp.br||rgiudici@usp.br |
_version_ |
1754213176284545024 |