CFD Simulation of Local and Global Mixing Time in an Agitated Tank
The Issue of mixing efficiency in agitated tanks has drawn serious concern in many industrial processes. The turbulence model is very critical to predicting mixing process in agitated tanks. On the basis of computational fluid dynamics（CFD） software package Fluent 6.2, the mixing characteristics in...
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| Veröffentlicht in: | Chinese journal of mechanical engineering 2017, Vol.30 (1), p.118-126 |
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| description | The Issue of mixing efficiency in agitated tanks has drawn serious concern in many industrial processes. The turbulence model is very critical to predicting mixing process in agitated tanks. On the basis of computational fluid dynamics（CFD） software package Fluent 6.2, the mixing characteristics in a tank agitated by dual six-blade-Rushton-turbines（6-DT） are predicted using the detached eddy simulation（DES） method. A sliding mesh（SM） approach is adopted to solve the rotation of the impeller. The simulated flow patterns and liquid velocities in the agitated tank are verified by experimental data in the literature. The simulation results indicate that the DES method can obtain more flow details than Reynolds-averaged Navier-Stokes（RANS） model. Local and global mixing time in the agitated tank is predicted by solving a tracer concentration scalar transport equation. The simulated results show that feeding points have great influence on mixing process and mixing time. Mixing efficiency is the highest for the feeding point at location of midway of the two impellers. Two methods are used to determine global mixing time and get close result. Dimensionless global mixing time remains unchanged with increasing of impeller speed. Parallel, merging and diverging flow pattern form in the agitated tank, respectively, by changing the impeller spacing and clearance of lower impeller from the bottom of the tank. The global mixing time is the shortest for the merging flow, followed by diverging flow, and the longest for parallel flow. The research presents helpful references for design, optimization and scale-up of agitated tanks with multi-impeller. |
| doi_str_mv | 10.3901/CJME.2016.1107.129 |
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The turbulence model is very critical to predicting mixing process in agitated tanks. On the basis of computational fluid dynamics（CFD） software package Fluent 6.2, the mixing characteristics in a tank agitated by dual six-blade-Rushton-turbines（6-DT） are predicted using the detached eddy simulation（DES） method. A sliding mesh（SM） approach is adopted to solve the rotation of the impeller. The simulated flow patterns and liquid velocities in the agitated tank are verified by experimental data in the literature. The simulation results indicate that the DES method can obtain more flow details than Reynolds-averaged Navier-Stokes（RANS） model. Local and global mixing time in the agitated tank is predicted by solving a tracer concentration scalar transport equation. The simulated results show that feeding points have great influence on mixing process and mixing time. Mixing efficiency is the highest for the feeding point at location of midway of the two impellers. Two methods are used to determine global mixing time and get close result. Dimensionless global mixing time remains unchanged with increasing of impeller speed. Parallel, merging and diverging flow pattern form in the agitated tank, respectively, by changing the impeller spacing and clearance of lower impeller from the bottom of the tank. The global mixing time is the shortest for the merging flow, followed by diverging flow, and the longest for parallel flow. The research presents helpful references for design, optimization and scale-up of agitated tanks with multi-impeller.</description><edition>English ed.</edition><identifier>ISSN: 1000-9345</identifier><identifier>EISSN: 2192-8258</identifier><identifier>DOI: 10.3901/CJME.2016.1107.129</identifier><language>eng</language><publisher>Beijing: Chinese Mechanical Engineering Society</publisher><subject>Agitation ; CFD模拟 ; Computational fluid dynamics ; Computer simulation ; Design optimization ; Detached eddy simulation ; Electrical Machines and Networks ; Electronics and Microelectronics ; Engineering ; Engineering Thermodynamics ; Feeding ; Finite element method ; Flow simulation ; FLUENT ; Fluid flow ; Heat and Mass Transfer ; Impellers ; Instrumentation ; Machines ; Manufacturing ; Mechanical Engineering ; Parallel flow ; Power Electronics ; Processes ; Product design ; Reynolds averaged Navier-Stokes method ; Simulation ; Stokes ; Tanks ; Theoretical and Applied Mechanics ; Turbines ; Turbulence models ; 叶轮转速 ; 工业生产过程 ; 搅拌槽 ; 混合时间 ; 计算流体动力学</subject><ispartof>Chinese journal of mechanical engineering, 2017, Vol.30 (1), p.118-126</ispartof><rights>Chinese Mechanical Engineering Society and Springer-Verlag Berlin Heidelberg 2017</rights><rights>Chinese Journal of Mechanical Engineering is a copyright of Springer, (2017). All Rights Reserved.</rights><rights>Copyright © Wanfang Data Co. Ltd. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c380t-e7c6fa5c7416b117c515db754de661ca324a7d11107b696cf524431ef2e5febf3</citedby><cites>FETCH-LOGICAL-c380t-e7c6fa5c7416b117c515db754de661ca324a7d11107b696cf524431ef2e5febf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://image.cqvip.com/vip1000/qk/85891X/85891X.jpg</thumbnail><link.rule.ids>314,776,780,4009,27902,27903,27904</link.rule.ids></links><search><creatorcontrib>Li, Liangchao</creatorcontrib><creatorcontrib>Xu, Bin</creatorcontrib><title>CFD Simulation of Local and Global Mixing Time in an Agitated Tank</title><title>Chinese journal of mechanical engineering</title><addtitle>Chin. J. Mech. Eng</addtitle><addtitle>Chinese Journal of Mechanical Engineering</addtitle><description>The Issue of mixing efficiency in agitated tanks has drawn serious concern in many industrial processes. The turbulence model is very critical to predicting mixing process in agitated tanks. On the basis of computational fluid dynamics（CFD） software package Fluent 6.2, the mixing characteristics in a tank agitated by dual six-blade-Rushton-turbines（6-DT） are predicted using the detached eddy simulation（DES） method. A sliding mesh（SM） approach is adopted to solve the rotation of the impeller. The simulated flow patterns and liquid velocities in the agitated tank are verified by experimental data in the literature. The simulation results indicate that the DES method can obtain more flow details than Reynolds-averaged Navier-Stokes（RANS） model. Local and global mixing time in the agitated tank is predicted by solving a tracer concentration scalar transport equation. The simulated results show that feeding points have great influence on mixing process and mixing time. Mixing efficiency is the highest for the feeding point at location of midway of the two impellers. Two methods are used to determine global mixing time and get close result. Dimensionless global mixing time remains unchanged with increasing of impeller speed. Parallel, merging and diverging flow pattern form in the agitated tank, respectively, by changing the impeller spacing and clearance of lower impeller from the bottom of the tank. The global mixing time is the shortest for the merging flow, followed by diverging flow, and the longest for parallel flow. The research presents helpful references for design, optimization and scale-up of agitated tanks with multi-impeller.</description><subject>Agitation</subject><subject>CFD模拟</subject><subject>Computational fluid dynamics</subject><subject>Computer simulation</subject><subject>Design optimization</subject><subject>Detached eddy simulation</subject><subject>Electrical Machines and Networks</subject><subject>Electronics and Microelectronics</subject><subject>Engineering</subject><subject>Engineering Thermodynamics</subject><subject>Feeding</subject><subject>Finite element method</subject><subject>Flow simulation</subject><subject>FLUENT</subject><subject>Fluid flow</subject><subject>Heat and Mass Transfer</subject><subject>Impellers</subject><subject>Instrumentation</subject><subject>Machines</subject><subject>Manufacturing</subject><subject>Mechanical Engineering</subject><subject>Parallel flow</subject><subject>Power Electronics</subject><subject>Processes</subject><subject>Product design</subject><subject>Reynolds averaged Navier-Stokes method</subject><subject>Simulation</subject><subject>Stokes</subject><subject>Tanks</subject><subject>Theoretical and Applied Mechanics</subject><subject>Turbines</subject><subject>Turbulence models</subject><subject>叶轮转速</subject><subject>工业生产过程</subject><subject>搅拌槽</subject><subject>混合时间</subject><subject>计算流体动力学</subject><issn>1000-9345</issn><issn>2192-8258</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kEFPwjAYhhujiYj-AU-NnjwM-7Vrtx1xAmogHsRz03XtHI4OtxHx39sFIjdPbdPn_d4vD0LXQEYsIXCfviwmI0pAjABINAKanKABhYQGMeXxKRoAISRIWMjP0UXbrvxLAMQD9JBOH_Fbud5Wqitrh2uL57VWFVYux7Oqzvx1Ue5KV-BluTa4dP4Hj4uyU53J8VK5z0t0ZlXVmqvDOUTv08kyfQrmr7PndDwPNItJF5hIC6u4jkIQGUCkOfA8i3iYGyFAK0ZDFeXQ75-JRGjLaRgyMJYabk1m2RDd7ed-K2eVK-Sq3jbON8rVrtC7TBovICJAgHn2ds9umvpra9ruCFPKExZT4MRTdE_ppm7bxli5acq1an4kENl7lb1X2XuV_V7Se_Uhtg-1HnaFaY6j_03dHKo-ald8-eBfl4g8xBnn7BcanYN9</recordid><startdate>2017</startdate><enddate>2017</enddate><creator>Li, Liangchao</creator><creator>Xu, Bin</creator><general>Chinese Mechanical Engineering Society</general><general>Springer Nature B.V</general><general>Key Laboratory of Testing Technology for Manufacturing Process of Ministry of Education,Southwest University of Science and Technology, Mianyang 621010, China</general><scope>2RA</scope><scope>92L</scope><scope>CQIGP</scope><scope>W92</scope><scope>~WA</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>L6V</scope><scope>M7S</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>2017</creationdate><title>CFD Simulation of Local and Global Mixing Time in an Agitated Tank</title><author>Li, Liangchao ; Xu, Bin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c380t-e7c6fa5c7416b117c515db754de661ca324a7d11107b696cf524431ef2e5febf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Agitation</topic><topic>CFD模拟</topic><topic>Computational fluid dynamics</topic><topic>Computer simulation</topic><topic>Design optimization</topic><topic>Detached eddy simulation</topic><topic>Electrical Machines and Networks</topic><topic>Electronics and Microelectronics</topic><topic>Engineering</topic><topic>Engineering Thermodynamics</topic><topic>Feeding</topic><topic>Finite element method</topic><topic>Flow simulation</topic><topic>FLUENT</topic><topic>Fluid flow</topic><topic>Heat and Mass Transfer</topic><topic>Impellers</topic><topic>Instrumentation</topic><topic>Machines</topic><topic>Manufacturing</topic><topic>Mechanical Engineering</topic><topic>Parallel flow</topic><topic>Power Electronics</topic><topic>Processes</topic><topic>Product design</topic><topic>Reynolds averaged Navier-Stokes method</topic><topic>Simulation</topic><topic>Stokes</topic><topic>Tanks</topic><topic>Theoretical and Applied Mechanics</topic><topic>Turbines</topic><topic>Turbulence models</topic><topic>叶轮转速</topic><topic>工业生产过程</topic><topic>搅拌槽</topic><topic>混合时间</topic><topic>计算流体动力学</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Liangchao</creatorcontrib><creatorcontrib>Xu, Bin</creatorcontrib><collection>中文科技期刊数据库</collection><collection>中文科技期刊数据库-CALIS站点</collection><collection>中文科技期刊数据库-7.0平台</collection><collection>中文科技期刊数据库-工程技术</collection><collection>中文科技期刊数据库- 镜像站点</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>Chinese journal of mechanical engineering</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Liangchao</au><au>Xu, Bin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>CFD Simulation of Local and Global Mixing Time in an Agitated Tank</atitle><jtitle>Chinese journal of mechanical engineering</jtitle><stitle>Chin. J. Mech. Eng</stitle><addtitle>Chinese Journal of Mechanical Engineering</addtitle><date>2017</date><risdate>2017</risdate><volume>30</volume><issue>1</issue><spage>118</spage><epage>126</epage><pages>118-126</pages><issn>1000-9345</issn><eissn>2192-8258</eissn><abstract>The Issue of mixing efficiency in agitated tanks has drawn serious concern in many industrial processes. The turbulence model is very critical to predicting mixing process in agitated tanks. On the basis of computational fluid dynamics（CFD） software package Fluent 6.2, the mixing characteristics in a tank agitated by dual six-blade-Rushton-turbines（6-DT） are predicted using the detached eddy simulation（DES） method. A sliding mesh（SM） approach is adopted to solve the rotation of the impeller. The simulated flow patterns and liquid velocities in the agitated tank are verified by experimental data in the literature. The simulation results indicate that the DES method can obtain more flow details than Reynolds-averaged Navier-Stokes（RANS） model. Local and global mixing time in the agitated tank is predicted by solving a tracer concentration scalar transport equation. The simulated results show that feeding points have great influence on mixing process and mixing time. Mixing efficiency is the highest for the feeding point at location of midway of the two impellers. Two methods are used to determine global mixing time and get close result. Dimensionless global mixing time remains unchanged with increasing of impeller speed. Parallel, merging and diverging flow pattern form in the agitated tank, respectively, by changing the impeller spacing and clearance of lower impeller from the bottom of the tank. The global mixing time is the shortest for the merging flow, followed by diverging flow, and the longest for parallel flow. The research presents helpful references for design, optimization and scale-up of agitated tanks with multi-impeller.</abstract><cop>Beijing</cop><pub>Chinese Mechanical Engineering Society</pub><doi>10.3901/CJME.2016.1107.129</doi><tpages>9</tpages><edition>English ed.</edition><oa>free_for_read</oa></addata></record> |
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| ispartof | Chinese journal of mechanical engineering, 2017, Vol.30 (1), p.118-126 |
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| source | EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Agitation CFD模拟 Computational fluid dynamics Computer simulation Design optimization Detached eddy simulation Electrical Machines and Networks Electronics and Microelectronics Engineering Engineering Thermodynamics Feeding Finite element method Flow simulation FLUENT Fluid flow Heat and Mass Transfer Impellers Instrumentation Machines Manufacturing Mechanical Engineering Parallel flow Power Electronics Processes Product design Reynolds averaged Navier-Stokes method Simulation Stokes Tanks Theoretical and Applied Mechanics Turbines Turbulence models 叶轮转速 工业生产过程 搅拌槽 混合时间 计算流体动力学 |
| title | CFD Simulation of Local and Global Mixing Time in an Agitated Tank |
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