Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner Cylinder
The generation of entropy and mixed convection in a nanofluid-filled 3D wavy tank containing a rotating cylinder is investigated. The top wavy surface of the tank is heated and all vertical surfaces are assumed to be adiabatic, while the bottom horizontal surface remains isothermally cold. The tank...
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MDPI AG
2022-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/1/244 |
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| author | Ammar I. Alsabery Mohammed J. Alshukri Nasr A. Jabbar Adel A. Eidan Ishak Hashim |
| author_facet | Ammar I. Alsabery Mohammed J. Alshukri Nasr A. Jabbar Adel A. Eidan Ishak Hashim |
| author_sort | Ammar I. Alsabery |
| collection | DOAJ |
| description | The generation of entropy and mixed convection in a nanofluid-filled 3D wavy tank containing a rotating cylinder is investigated. The top wavy surface of the tank is heated and all vertical surfaces are assumed to be adiabatic, while the bottom horizontal surface remains isothermally cold. The tank contains a solid cylinder and is saturated with an Al<sub>2</sub>O<sub>3</sub>–water nanofluid. The numerical simulations using the FEM are performed for the Richardson number (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0.01</mn><mo>≤</mo><mi>R</mi><mi>i</mi><mo>≤</mo><mn>100</mn></mrow></semantics></math></inline-formula>), nanoparticle volume fraction (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>ϕ</mi><mo>≤</mo><mn>0.04</mn></mrow></semantics></math></inline-formula>) and number of oscillations (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>N</mi><mo>≤</mo><mn>4</mn></mrow></semantics></math></inline-formula>). The numerical results of the present work are given in terms of 3D streamlines, isotherms and local entropy generation, as well as average heat transfer and Bejan number. The results show that for low values of the Richardson number and oscillation, heat transfer enhancement can be achieved by increasing the nanoparticle volume fraction. |
| first_indexed | 2024-03-11T10:03:02Z |
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| id | doaj.art-81aba4f929164c80a6ce0e743c2e29c5 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T10:03:02Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-81aba4f929164c80a6ce0e743c2e29c52023-11-16T15:16:33ZengMDPI AGEnergies1996-10732022-12-0116124410.3390/en16010244Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner CylinderAmmar I. Alsabery0Mohammed J. Alshukri1Nasr A. Jabbar2Adel A. Eidan3Ishak Hashim4Refrigeration & Air-Conditioning Technical, Engineering Department, The Islamic University, Najaf 540011, IraqDepartment of Mechanical Engineering, Faculty of Engineering, Kufa University, Najaf 54002, IraqDepartment of Mechanical Engineering, Faculty of Engineering, Kufa University, Najaf 54002, IraqNajaf Technical College, Al-Furat Al-Awsat Technical University, Najaf 540011, IraqDepartment of Mathematical Sciences, Faculty of Science & Technology, Universiti Kebangsaan Malaysia, Bangi 43600, MalaysiaThe generation of entropy and mixed convection in a nanofluid-filled 3D wavy tank containing a rotating cylinder is investigated. The top wavy surface of the tank is heated and all vertical surfaces are assumed to be adiabatic, while the bottom horizontal surface remains isothermally cold. The tank contains a solid cylinder and is saturated with an Al<sub>2</sub>O<sub>3</sub>–water nanofluid. The numerical simulations using the FEM are performed for the Richardson number (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0.01</mn><mo>≤</mo><mi>R</mi><mi>i</mi><mo>≤</mo><mn>100</mn></mrow></semantics></math></inline-formula>), nanoparticle volume fraction (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>ϕ</mi><mo>≤</mo><mn>0.04</mn></mrow></semantics></math></inline-formula>) and number of oscillations (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>0</mn><mo>≤</mo><mi>N</mi><mo>≤</mo><mn>4</mn></mrow></semantics></math></inline-formula>). The numerical results of the present work are given in terms of 3D streamlines, isotherms and local entropy generation, as well as average heat transfer and Bejan number. The results show that for low values of the Richardson number and oscillation, heat transfer enhancement can be achieved by increasing the nanoparticle volume fraction.https://www.mdpi.com/1996-1073/16/1/244combined convectionentropy generationrotating inner cylinder3D wave tanknanofluid |
| spellingShingle | Ammar I. Alsabery Mohammed J. Alshukri Nasr A. Jabbar Adel A. Eidan Ishak Hashim Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner Cylinder Energies combined convection entropy generation rotating inner cylinder 3D wave tank nanofluid |
| title | Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner Cylinder |
| title_full | Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner Cylinder |
| title_fullStr | Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner Cylinder |
| title_full_unstemmed | Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner Cylinder |
| title_short | Entropy Generation and Mixed Convection of a Nanofluid in a 3D Wave Tank with Rotating Inner Cylinder |
| title_sort | entropy generation and mixed convection of a nanofluid in a 3d wave tank with rotating inner cylinder |
| topic | combined convection entropy generation rotating inner cylinder 3D wave tank nanofluid |
| url | https://www.mdpi.com/1996-1073/16/1/244 |
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