Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders
Nanofluid mixed convection in a triangular shed equipped with rotating cylinders subjected to a heat source is numerically investigated in this study. The shed is heated and cooled respectively from a rectangular heat source at the bottom wall and inclined top walls. Two rotating cylinders are place...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-08-01
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| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202721000434 |
| _version_ | 1818669633529446400 |
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| author | Mohammad Mokaddes Ali Rowsanara Akhter Md.Abdul Alim |
| author_facet | Mohammad Mokaddes Ali Rowsanara Akhter Md.Abdul Alim |
| author_sort | Mohammad Mokaddes Ali |
| collection | DOAJ |
| description | Nanofluid mixed convection in a triangular shed equipped with rotating cylinders subjected to a heat source is numerically investigated in this study. The shed is heated and cooled respectively from a rectangular heat source at the bottom wall and inclined top walls. Two rotating cylinders are placed over the heat source. The shed is permeated by an external magnetic field. The conservation equations are solved using finite element method. The code is verified by comparisons with previously published results. The numerical results of flow and temperature fields are demonstrated via streamlines, isotherms and bar charts for the variation of key parameters: Reynolds number (0≤Re≤100), Hartmann number (0 ≤ Ha ≤ 50), nanoparticle volume fraction (0% ≤ φ ≤ 5%), rotational speed of cylinders (10 ≤ Uc ≤ 100) and different positions of heat source. The strength of flow circulation is found accelerating with increasing Reynolds number and rotational velocity of cylinders but it declines for the effects of magnetic field and nanoparticle volume fraction. The thermal field is significantly influenced due to the variation in Reynolds number, cylinders rotational speed and the position of heat source. Maximum heat transfer is found at the corner positions of heat source, and it is 13.70% more than heat transfer for the case of centered position. Optimum heat transfer performance is taken place at higher rotational speed of the cylinders whereas reverse trend for higher magnetic strength. The best heat transfer rate is achieved in nanofluid with maximum concentration of nanoparticles (5%), which is 94.18% than heat transfer for base fluid water. |
| first_indexed | 2024-12-17T06:55:19Z |
| format | Article |
| id | doaj.art-e21186b904b249298ba185075eef890a |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-12-17T06:55:19Z |
| publishDate | 2021-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-e21186b904b249298ba185075eef890a2022-12-21T21:59:27ZengElsevierInternational Journal of Thermofluids2666-20272021-08-0111100105Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylindersMohammad Mokaddes Ali0Rowsanara Akhter1Md.Abdul Alim2Department of Mathematics, Mawlana Bhashani Science and Technology University, Tangail 1902, Bangladesh; Corresponding author.Department of Electrical and Electronic Engineering, The International University of Scholars, Dhaka 1212, BangladeshDepartment of Mathematics, Bangladesh University of Engineering and Technology, Dhaka 1000, BangladeshNanofluid mixed convection in a triangular shed equipped with rotating cylinders subjected to a heat source is numerically investigated in this study. The shed is heated and cooled respectively from a rectangular heat source at the bottom wall and inclined top walls. Two rotating cylinders are placed over the heat source. The shed is permeated by an external magnetic field. The conservation equations are solved using finite element method. The code is verified by comparisons with previously published results. The numerical results of flow and temperature fields are demonstrated via streamlines, isotherms and bar charts for the variation of key parameters: Reynolds number (0≤Re≤100), Hartmann number (0 ≤ Ha ≤ 50), nanoparticle volume fraction (0% ≤ φ ≤ 5%), rotational speed of cylinders (10 ≤ Uc ≤ 100) and different positions of heat source. The strength of flow circulation is found accelerating with increasing Reynolds number and rotational velocity of cylinders but it declines for the effects of magnetic field and nanoparticle volume fraction. The thermal field is significantly influenced due to the variation in Reynolds number, cylinders rotational speed and the position of heat source. Maximum heat transfer is found at the corner positions of heat source, and it is 13.70% more than heat transfer for the case of centered position. Optimum heat transfer performance is taken place at higher rotational speed of the cylinders whereas reverse trend for higher magnetic strength. The best heat transfer rate is achieved in nanofluid with maximum concentration of nanoparticles (5%), which is 94.18% than heat transfer for base fluid water.http://www.sciencedirect.com/science/article/pii/S2666202721000434Mixed convectionNanofluidsMagnetic fieldRotating cylindersRectangular heat sourceTriangular shed |
| spellingShingle | Mohammad Mokaddes Ali Rowsanara Akhter Md.Abdul Alim Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders International Journal of Thermofluids Mixed convection Nanofluids Magnetic field Rotating cylinders Rectangular heat source Triangular shed |
| title | Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders |
| title_full | Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders |
| title_fullStr | Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders |
| title_full_unstemmed | Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders |
| title_short | Hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders |
| title_sort | hydromagnetic mixed convection in a triangular shed filled by nanofluid and equipped with rectangular heater and rotating cylinders |
| topic | Mixed convection Nanofluids Magnetic field Rotating cylinders Rectangular heat source Triangular shed |
| url | http://www.sciencedirect.com/science/article/pii/S2666202721000434 |
| work_keys_str_mv | AT mohammadmokaddesali hydromagneticmixedconvectioninatriangularshedfilledbynanofluidandequippedwithrectangularheaterandrotatingcylinders AT rowsanaraakhter hydromagneticmixedconvectioninatriangularshedfilledbynanofluidandequippedwithrectangularheaterandrotatingcylinders AT mdabdulalim hydromagneticmixedconvectioninatriangularshedfilledbynanofluidandequippedwithrectangularheaterandrotatingcylinders |