Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace
Radiative heat transfer has an important role in many industrial equipment; i.e. furnaces, boilers and high temperature heat exchangers. In this paper, combination of Weighted Sum of Gray Gas Method (WSSGM) and Discrete Ordinate Method (DOM) are used together in order to numerically study the radiat...
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| Format: | Article |
| Language: | English |
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Islamic Azad University-Isfahan (Khorasgan) Branch
2020-03-01
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| Series: | International Journal of Advanced Design and Manufacturing Technology |
| Subjects: | |
| Online Access: | https://admt.isfahan.iau.ir/article_672111_bc7f014f7b293b124466ced0b3ea57a1.pdf |
| _version_ | 1797657312996884480 |
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| author | Amin Al Taha MohamadMehdi Keshtkar |
| author_facet | Amin Al Taha MohamadMehdi Keshtkar |
| author_sort | Amin Al Taha |
| collection | DOAJ |
| description | Radiative heat transfer has an important role in many industrial equipment; i.e. furnaces, boilers and high temperature heat exchangers. In this paper, combination of Weighted Sum of Gray Gas Method (WSSGM) and Discrete Ordinate Method (DOM) are used together in order to numerically study the radiative heat transfer behavior in a non-gray participating medium. Moreover, the concept of Blocked-off region for irregular geometries is used to simulate the T-shaped furnace. The effect of different radiative parameters, i.e. scattering coefficient and wall emissivity on thermal behavior and wall heat fluxes is investigated and compared for both gray and non-gray media. The results show thatwhen scattering coefficient increases, more radiation is scattered in the medium and therefore less heat flux reaches the walls such that by increasing scattering coefficient from 1.0 to 5.0, the incident radiative heat flux decreases up to 15% in some parts of bottom wall. It is seen that by increasing wall emissivity from 0.5 to 1.0, wall heat flux increases more than 60%. Moreover, results show that, by increasing the temperature, the maximum error strongly increases which indicates that in many engineering problems, the gray medium assumption leads to great error in results. |
| first_indexed | 2024-03-11T17:42:40Z |
| format | Article |
| id | doaj.art-34765ffde19b46649ebc2d072c58c1a8 |
| institution | Directory Open Access Journal |
| issn | 2252-0406 2383-4447 |
| language | English |
| last_indexed | 2024-03-11T17:42:40Z |
| publishDate | 2020-03-01 |
| publisher | Islamic Azad University-Isfahan (Khorasgan) Branch |
| record_format | Article |
| series | International Journal of Advanced Design and Manufacturing Technology |
| spelling | doaj.art-34765ffde19b46649ebc2d072c58c1a82023-10-18T08:59:28ZengIslamic Azad University-Isfahan (Khorasgan) BranchInternational Journal of Advanced Design and Manufacturing Technology2252-04062383-44472020-03-011313949672111Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped FurnaceAmin Al Taha0MohamadMehdi Keshtkar1Department of Mechanical Engineering, Kerman Branch, Islamic Azad University, Kerman, IranDepartment of Mechanical Engineering, Kerman Branch, Islamic Azad University, Kerman, IranRadiative heat transfer has an important role in many industrial equipment; i.e. furnaces, boilers and high temperature heat exchangers. In this paper, combination of Weighted Sum of Gray Gas Method (WSSGM) and Discrete Ordinate Method (DOM) are used together in order to numerically study the radiative heat transfer behavior in a non-gray participating medium. Moreover, the concept of Blocked-off region for irregular geometries is used to simulate the T-shaped furnace. The effect of different radiative parameters, i.e. scattering coefficient and wall emissivity on thermal behavior and wall heat fluxes is investigated and compared for both gray and non-gray media. The results show thatwhen scattering coefficient increases, more radiation is scattered in the medium and therefore less heat flux reaches the walls such that by increasing scattering coefficient from 1.0 to 5.0, the incident radiative heat flux decreases up to 15% in some parts of bottom wall. It is seen that by increasing wall emissivity from 0.5 to 1.0, wall heat flux increases more than 60%. Moreover, results show that, by increasing the temperature, the maximum error strongly increases which indicates that in many engineering problems, the gray medium assumption leads to great error in results.https://admt.isfahan.iau.ir/article_672111_bc7f014f7b293b124466ced0b3ea57a1.pdfblocked-offdiscrete ordinate methodnon-gray mediaradiative heat transferweighted sum of gray gas method |
| spellingShingle | Amin Al Taha MohamadMehdi Keshtkar Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace International Journal of Advanced Design and Manufacturing Technology blocked-off discrete ordinate method non-gray media radiative heat transfer weighted sum of gray gas method |
| title | Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace |
| title_full | Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace |
| title_fullStr | Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace |
| title_full_unstemmed | Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace |
| title_short | Numerical Study of Non-Gray Radiative Heat Transfer in a T-shaped Furnace |
| title_sort | numerical study of non gray radiative heat transfer in a t shaped furnace |
| topic | blocked-off discrete ordinate method non-gray media radiative heat transfer weighted sum of gray gas method |
| url | https://admt.isfahan.iau.ir/article_672111_bc7f014f7b293b124466ced0b3ea57a1.pdf |
| work_keys_str_mv | AT aminaltaha numericalstudyofnongrayradiativeheattransferinatshapedfurnace AT mohamadmehdikeshtkar numericalstudyofnongrayradiativeheattransferinatshapedfurnace |