CFD calculations of flow pattern maps and LES of multiphase flows
•Definition of a multifield approach: small bubbles are modelled through a dispersed approach within the two-fluid model, and large bubbles are simulated with an interface locating method.•Calculation of a flow pattern map including dispersed bubbly, plug and slug flows.•LES study of the two-fluid e...
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| Veröffentlicht in: | Nuclear engineering and design 2017-09, Vol.321, p.118-131 |
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| creator | Mimouni, Stephane Fleau, Solene Vincent, Stephane |
| description | •Definition of a multifield approach: small bubbles are modelled through a dispersed approach within the two-fluid model, and large bubbles are simulated with an interface locating method.•Calculation of a flow pattern map including dispersed bubbly, plug and slug flows.•LES study of the two-fluid equations.
Boiling crisis and flows occurring in a steam generator or a heat exchanger remain a major limiting phenomenon for the analysis of operation and safety of both nuclear reactors and conventional thermal power systems. Firstly, the choice is made to investigate a hybrid modelling of the flow, considering the gas phase as two separated fields, each one being modelled with different closure laws. In so doing, the small and spherical bubbles are modelled through a dispersed approach within the two-fluid model, and the distorted or large bubbles are simulated with an interface locating method.
This kind of approach is requiring a set of mass transfer terms between the continuous and the dispersed fields of the same physicochemical phase.
The main outcome is the simulation of three field cases with a complete set of coupling terms between the two gas fields. Firstly, validation results are presented in the Castillejos test case where air is injected at the bottom of a cylindrical bubble column. Next, METERO experiments are simulated with this multifield approach. METERO is an experimental rig dedicated to the study of turbulent mixing of air and water in horizontal flows. The different regimes encountered in the METERO experiments, i.e. slug flows, plug flows and stratified dispersed bubbly flows are simulated and presented in the paper. Quantitative results are also presented for the first time in the paper. Finally, MAXI2 experiment (liquid/vapour flow in oblique tubes bundle geometry) is simulated: the three-field approach gives a reasonable agreement with experimental data.
The important topic of turbulence modelling for two-phase flows is also addressed in the paper. The key point is that the ADM model could constitute an interesting improvement in further studies. |
| doi_str_mv | 10.1016/j.nucengdes.2016.12.009 |
| format | Article |
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Boiling crisis and flows occurring in a steam generator or a heat exchanger remain a major limiting phenomenon for the analysis of operation and safety of both nuclear reactors and conventional thermal power systems. Firstly, the choice is made to investigate a hybrid modelling of the flow, considering the gas phase as two separated fields, each one being modelled with different closure laws. In so doing, the small and spherical bubbles are modelled through a dispersed approach within the two-fluid model, and the distorted or large bubbles are simulated with an interface locating method.
This kind of approach is requiring a set of mass transfer terms between the continuous and the dispersed fields of the same physicochemical phase.
The main outcome is the simulation of three field cases with a complete set of coupling terms between the two gas fields. Firstly, validation results are presented in the Castillejos test case where air is injected at the bottom of a cylindrical bubble column. Next, METERO experiments are simulated with this multifield approach. METERO is an experimental rig dedicated to the study of turbulent mixing of air and water in horizontal flows. The different regimes encountered in the METERO experiments, i.e. slug flows, plug flows and stratified dispersed bubbly flows are simulated and presented in the paper. Quantitative results are also presented for the first time in the paper. Finally, MAXI2 experiment (liquid/vapour flow in oblique tubes bundle geometry) is simulated: the three-field approach gives a reasonable agreement with experimental data.
The important topic of turbulence modelling for two-phase flows is also addressed in the paper. The key point is that the ADM model could constitute an interesting improvement in further studies.</description><identifier>ISSN: 0029-5493</identifier><identifier>EISSN: 1872-759X</identifier><identifier>DOI: 10.1016/j.nucengdes.2016.12.009</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Aerodynamics ; Boilers ; Boiling ; Bottom casting ; Bubbles ; Computational fluid dynamics ; Computer simulation ; Dispersion ; Engineering Sciences ; Experiments ; Flow pattern ; Fluid flow ; Fluids mechanics ; Heat exchangers ; Mass transfer ; Mechanics ; Modelling ; Nuclear accidents & safety ; Nuclear electric power generation ; Nuclear engineering ; Nuclear reactors ; Nuclear safety ; Oil and gas fields ; Simulation ; Steam electric power generation ; Thermal energy ; Thermal power ; Tubes ; Turbulence ; Turbulence models ; Turbulent mixing ; Two fluid models ; Two phase flow</subject><ispartof>Nuclear engineering and design, 2017-09, Vol.321, p.118-131</ispartof><rights>2016 Elsevier B.V.</rights><rights>Copyright Elsevier BV Sep 2017</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c426t-1a8ed657177abbbcb78a6ede962d08f1d59d2f9dc9b1c06fdd13f03d5bcb22783</citedby><cites>FETCH-LOGICAL-c426t-1a8ed657177abbbcb78a6ede962d08f1d59d2f9dc9b1c06fdd13f03d5bcb22783</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.nucengdes.2016.12.009$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,780,784,885,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttps://hal.science/hal-01496261$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Mimouni, Stephane</creatorcontrib><creatorcontrib>Fleau, Solene</creatorcontrib><creatorcontrib>Vincent, Stephane</creatorcontrib><title>CFD calculations of flow pattern maps and LES of multiphase flows</title><title>Nuclear engineering and design</title><description>•Definition of a multifield approach: small bubbles are modelled through a dispersed approach within the two-fluid model, and large bubbles are simulated with an interface locating method.•Calculation of a flow pattern map including dispersed bubbly, plug and slug flows.•LES study of the two-fluid equations.
Boiling crisis and flows occurring in a steam generator or a heat exchanger remain a major limiting phenomenon for the analysis of operation and safety of both nuclear reactors and conventional thermal power systems. Firstly, the choice is made to investigate a hybrid modelling of the flow, considering the gas phase as two separated fields, each one being modelled with different closure laws. In so doing, the small and spherical bubbles are modelled through a dispersed approach within the two-fluid model, and the distorted or large bubbles are simulated with an interface locating method.
This kind of approach is requiring a set of mass transfer terms between the continuous and the dispersed fields of the same physicochemical phase.
The main outcome is the simulation of three field cases with a complete set of coupling terms between the two gas fields. Firstly, validation results are presented in the Castillejos test case where air is injected at the bottom of a cylindrical bubble column. Next, METERO experiments are simulated with this multifield approach. METERO is an experimental rig dedicated to the study of turbulent mixing of air and water in horizontal flows. The different regimes encountered in the METERO experiments, i.e. slug flows, plug flows and stratified dispersed bubbly flows are simulated and presented in the paper. Quantitative results are also presented for the first time in the paper. Finally, MAXI2 experiment (liquid/vapour flow in oblique tubes bundle geometry) is simulated: the three-field approach gives a reasonable agreement with experimental data.
The important topic of turbulence modelling for two-phase flows is also addressed in the paper. The key point is that the ADM model could constitute an interesting improvement in further studies.</description><subject>Aerodynamics</subject><subject>Boilers</subject><subject>Boiling</subject><subject>Bottom casting</subject><subject>Bubbles</subject><subject>Computational fluid dynamics</subject><subject>Computer simulation</subject><subject>Dispersion</subject><subject>Engineering Sciences</subject><subject>Experiments</subject><subject>Flow pattern</subject><subject>Fluid flow</subject><subject>Fluids mechanics</subject><subject>Heat exchangers</subject><subject>Mass transfer</subject><subject>Mechanics</subject><subject>Modelling</subject><subject>Nuclear accidents & safety</subject><subject>Nuclear electric power generation</subject><subject>Nuclear engineering</subject><subject>Nuclear reactors</subject><subject>Nuclear safety</subject><subject>Oil and gas fields</subject><subject>Simulation</subject><subject>Steam electric power generation</subject><subject>Thermal energy</subject><subject>Thermal power</subject><subject>Tubes</subject><subject>Turbulence</subject><subject>Turbulence models</subject><subject>Turbulent mixing</subject><subject>Two fluid models</subject><subject>Two phase flow</subject><issn>0029-5493</issn><issn>1872-759X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqFkEFPhDAQhRujievqb5DEkwewU5aWHsm665qQeFATb01piwthAVtY47-3iPHqXCaZ-d7LzEPoGnAEGOhdHbWjMu27Ni4ifhABiTDmJ2gBKSMhS_jbKVpgTHiYrHh8ji6cq_FUnCxQtt7eB0o2amzkUHWtC7oyKJvuM-jlMBjbBgfZu0C2Osg3z9PyMDZD1e-lMz-cu0RnpWycufrtS_S63bysd2H-9PC4zvJQrQgdQpCp0TRhwJgsikIVLJXUaMMp0TgtQSdck5JrxQtQmJZaQ1ziWCceJYSl8RLdzr572YjeVgdpv0QnK7HLcjHNMKy8GYUjePZmZnvbfYzGDaLuRtv68wRwSjGLEyCeYjOlbOecNeWfLWAxZStq8ZetmLIVQITPzSuzWWn8w8fKWOFUZVpldGWNGoTuqn89vgFsHIXf</recordid><startdate>20170901</startdate><enddate>20170901</enddate><creator>Mimouni, Stephane</creator><creator>Fleau, Solene</creator><creator>Vincent, Stephane</creator><general>Elsevier B.V</general><general>Elsevier BV</general><general>Elsevier</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7ST</scope><scope>7TB</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope><scope>SOI</scope><scope>1XC</scope></search><sort><creationdate>20170901</creationdate><title>CFD calculations of flow pattern maps and LES of multiphase flows</title><author>Mimouni, Stephane ; Fleau, Solene ; Vincent, Stephane</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c426t-1a8ed657177abbbcb78a6ede962d08f1d59d2f9dc9b1c06fdd13f03d5bcb22783</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Aerodynamics</topic><topic>Boilers</topic><topic>Boiling</topic><topic>Bottom casting</topic><topic>Bubbles</topic><topic>Computational fluid dynamics</topic><topic>Computer simulation</topic><topic>Dispersion</topic><topic>Engineering Sciences</topic><topic>Experiments</topic><topic>Flow pattern</topic><topic>Fluid flow</topic><topic>Fluids mechanics</topic><topic>Heat exchangers</topic><topic>Mass transfer</topic><topic>Mechanics</topic><topic>Modelling</topic><topic>Nuclear accidents & safety</topic><topic>Nuclear electric power generation</topic><topic>Nuclear engineering</topic><topic>Nuclear reactors</topic><topic>Nuclear safety</topic><topic>Oil and gas fields</topic><topic>Simulation</topic><topic>Steam electric power generation</topic><topic>Thermal energy</topic><topic>Thermal power</topic><topic>Tubes</topic><topic>Turbulence</topic><topic>Turbulence models</topic><topic>Turbulent mixing</topic><topic>Two fluid models</topic><topic>Two phase flow</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mimouni, Stephane</creatorcontrib><creatorcontrib>Fleau, Solene</creatorcontrib><creatorcontrib>Vincent, Stephane</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Environment Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Nuclear engineering and design</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mimouni, Stephane</au><au>Fleau, Solene</au><au>Vincent, Stephane</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>CFD calculations of flow pattern maps and LES of multiphase flows</atitle><jtitle>Nuclear engineering and design</jtitle><date>2017-09-01</date><risdate>2017</risdate><volume>321</volume><spage>118</spage><epage>131</epage><pages>118-131</pages><issn>0029-5493</issn><eissn>1872-759X</eissn><abstract>•Definition of a multifield approach: small bubbles are modelled through a dispersed approach within the two-fluid model, and large bubbles are simulated with an interface locating method.•Calculation of a flow pattern map including dispersed bubbly, plug and slug flows.•LES study of the two-fluid equations.
Boiling crisis and flows occurring in a steam generator or a heat exchanger remain a major limiting phenomenon for the analysis of operation and safety of both nuclear reactors and conventional thermal power systems. Firstly, the choice is made to investigate a hybrid modelling of the flow, considering the gas phase as two separated fields, each one being modelled with different closure laws. In so doing, the small and spherical bubbles are modelled through a dispersed approach within the two-fluid model, and the distorted or large bubbles are simulated with an interface locating method.
This kind of approach is requiring a set of mass transfer terms between the continuous and the dispersed fields of the same physicochemical phase.
The main outcome is the simulation of three field cases with a complete set of coupling terms between the two gas fields. Firstly, validation results are presented in the Castillejos test case where air is injected at the bottom of a cylindrical bubble column. Next, METERO experiments are simulated with this multifield approach. METERO is an experimental rig dedicated to the study of turbulent mixing of air and water in horizontal flows. The different regimes encountered in the METERO experiments, i.e. slug flows, plug flows and stratified dispersed bubbly flows are simulated and presented in the paper. Quantitative results are also presented for the first time in the paper. Finally, MAXI2 experiment (liquid/vapour flow in oblique tubes bundle geometry) is simulated: the three-field approach gives a reasonable agreement with experimental data.
The important topic of turbulence modelling for two-phase flows is also addressed in the paper. The key point is that the ADM model could constitute an interesting improvement in further studies.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.nucengdes.2016.12.009</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Aerodynamics Boilers Boiling Bottom casting Bubbles Computational fluid dynamics Computer simulation Dispersion Engineering Sciences Experiments Flow pattern Fluid flow Fluids mechanics Heat exchangers Mass transfer Mechanics Modelling Nuclear accidents & safety Nuclear electric power generation Nuclear engineering Nuclear reactors Nuclear safety Oil and gas fields Simulation Steam electric power generation Thermal energy Thermal power Tubes Turbulence Turbulence models Turbulent mixing Two fluid models Two phase flow |
| title | CFD calculations of flow pattern maps and LES of multiphase flows |
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