Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred Vessel
Detailed information on the flow field in the operation of a mixing unit is necessary for the optimal design of the reactor. The flow field characteristic is an essential factor in obtaining an optimal stirred vessel design. The efficiency of the stirred vessel system depends on, for example, the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Universitas Indonesia
2019-05-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | http://ijtech.eng.ui.ac.id/article/view/2926 |
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| author | Suci Madhania Tantular Nurtono Sugeng Winardi Yuswan Muharam Widodo Wahyu Purwanto |
| author_facet | Suci Madhania Tantular Nurtono Sugeng Winardi Yuswan Muharam Widodo Wahyu Purwanto |
| author_sort | Suci Madhania |
| collection | DOAJ |
| description | Detailed information on the flow field in
the operation of a mixing unit is necessary for the optimal design of the
reactor. The flow field characteristic is an essential factor in obtaining an optimal stirred vessel design.
The efficiency of the stirred vessel system depends on, for example, the
stirred vessel geometry, the flow induced by the impeller, the working fluid properties and the operating condition. The aim of this study is to exhibit the time-dependent flow
field of the mixing process inside a stirred vessel for different propeller
rotational speeds using computational fluid dynamics methods. The working fluid in question is molasses and water,
which is a miscible liquid. The stirred vessel is a conical-bottomed
cylindrical vessel (D =
0.28 m and H = 0.395 m) equipped with
a three-blade propeller (d = 0.036
m). The transient calculation was conducted using ANSYS Fluent version 18.2.
The Mixture multiphase flow model coupled with the Reynolds-averaged
Navier-Stokes Standard k-? (SKE) turbulence model was applied to capture the
information on the time-dependent flow fields at various propeller rotational
speeds inside the stirred vessel. The flow generated by the propeller was
compared at 1000 rpm, 1300 rpm and 1500 rpm. The Multiple Reference Frame
method was used to solve the moving domain and stationary domain multiple
frames case. The results revealed the
local velocity, flow pattern, molasses volume fraction value, density gradient distribution, power number and flow number. The profile of all the variables determines the optimal operating
conditions
for the degree of mixing
required. |
| first_indexed | 2024-04-11T03:18:27Z |
| format | Article |
| id | doaj.art-91593cb263b74239a13f6e9c1ea7cb16 |
| institution | Directory Open Access Journal |
| issn | 2086-9614 2087-2100 |
| language | English |
| last_indexed | 2024-04-11T03:18:27Z |
| publishDate | 2019-05-01 |
| publisher | Universitas Indonesia |
| record_format | Article |
| series | International Journal of Technology |
| spelling | doaj.art-91593cb263b74239a13f6e9c1ea7cb162023-01-02T09:49:55ZengUniversitas IndonesiaInternational Journal of Technology2086-96142087-21002019-05-0110356157010.14716/ijtech.v10i3.29262926Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred VesselSuci Madhania0Tantular Nurtono1Sugeng Winardi2Yuswan Muharam3Widodo Wahyu Purwanto4-Department of Chemical Engineering, Faculty of Engineering, Universitas Indonesia -Chemical Engineering Department, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo,Chemical Engineering Department, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, IndonesiaChemical Engineering Department, Institut Teknologi Sepuluh Nopember, Kampus ITS Sukolilo, Surabaya 60111, IndonesiaDepartment of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, IndonesiaDepartment of Chemical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, IndonesiaDetailed information on the flow field in the operation of a mixing unit is necessary for the optimal design of the reactor. The flow field characteristic is an essential factor in obtaining an optimal stirred vessel design. The efficiency of the stirred vessel system depends on, for example, the stirred vessel geometry, the flow induced by the impeller, the working fluid properties and the operating condition. The aim of this study is to exhibit the time-dependent flow field of the mixing process inside a stirred vessel for different propeller rotational speeds using computational fluid dynamics methods. The working fluid in question is molasses and water, which is a miscible liquid. The stirred vessel is a conical-bottomed cylindrical vessel (D = 0.28 m and H = 0.395 m) equipped with a three-blade propeller (d = 0.036 m). The transient calculation was conducted using ANSYS Fluent version 18.2. The Mixture multiphase flow model coupled with the Reynolds-averaged Navier-Stokes Standard k-? (SKE) turbulence model was applied to capture the information on the time-dependent flow fields at various propeller rotational speeds inside the stirred vessel. The flow generated by the propeller was compared at 1000 rpm, 1300 rpm and 1500 rpm. The Multiple Reference Frame method was used to solve the moving domain and stationary domain multiple frames case. The results revealed the local velocity, flow pattern, molasses volume fraction value, density gradient distribution, power number and flow number. The profile of all the variables determines the optimal operating conditions for the degree of mixing required.http://ijtech.eng.ui.ac.id/article/view/2926Computational fluid dynamicsMultiphase flowPropellerStirred vesselTurbulent flow |
| spellingShingle | Suci Madhania Tantular Nurtono Sugeng Winardi Yuswan Muharam Widodo Wahyu Purwanto Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred Vessel International Journal of Technology Computational fluid dynamics Multiphase flow Propeller Stirred vessel Turbulent flow |
| title | Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred Vessel |
| title_full | Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred Vessel |
| title_fullStr | Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred Vessel |
| title_full_unstemmed | Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred Vessel |
| title_short | Computational Study of the Time-dependent Flow Field of a Water-Molasses Mixture Inside a Stirred Vessel |
| title_sort | computational study of the time dependent flow field of a water molasses mixture inside a stirred vessel |
| topic | Computational fluid dynamics Multiphase flow Propeller Stirred vessel Turbulent flow |
| url | http://ijtech.eng.ui.ac.id/article/view/2926 |
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