Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structures
Metallic-based microcellular structures are widely used in heat and mass transfer processes owing to their unique combination of high porosity, high surface area, fixed pore morphology and high Young modulus, enabling their suitability as heat pipes in oil and gas processing equipment, biomedical ma...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-05-01
|
| Series: | International Journal of Thermofluids |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202722000088 |
| _version_ | 1811339896897404928 |
|---|---|
| author | A.J. Otaru M. Abdulkadir A.S. Kovo M.R. Corfield N. Tanko O.A. Odey A. Kenfack U.O. Aroke |
| author_facet | A.J. Otaru M. Abdulkadir A.S. Kovo M.R. Corfield N. Tanko O.A. Odey A. Kenfack U.O. Aroke |
| author_sort | A.J. Otaru |
| collection | DOAJ |
| description | Metallic-based microcellular structures are widely used in heat and mass transfer processes owing to their unique combination of high porosity, high surface area, fixed pore morphology and high Young modulus, enabling their suitability as heat pipes in oil and gas processing equipment, biomedical materials for bone repair and bone substitution, solar collectors, fuel cells, impact loading, soundproofing materials and metallurgical processing. Accurate representation of the effective thermal conductivity of these materials is imperative in understanding their heat transfer mechanisms leading to the design and optimisation of system performance. Due to the limited availability of experimental and predictive data on heat transport phenomena across the interstices of low-porosity microcellular structures - numerically simulated data of effective thermal conductivity for conduction heat transfer in metal foam-fluid systems have been compared for structures typified by near-circular pore walls and openings, i.e. “bottleneck-type” structures and foam porosity ranging between 0.65 and 0.78. A three-dimensional high-resolution image inversion and computational fluid dynamics modelling and simulation of conductive heat transfer for both the fluid and solid domains at pore level is used to estimate effective thermal conductivity for these structures. This approach is extended to structurally-adapted metal foam-fluid systems by broadening the pore volume fraction beyond 0.90 – resulting in the quantification of the fluid phase contribution for heat transfer enhancement and the proposition of empirical constants to support models developed by Calmidi & Mahajan [9]. Findings in this work offer strong support to the supposition that geometrical adaptions of microcellular structures can be used to modulate their effective thermal conductivity and that generalised values of empirical constants may be ambiguous to fully describe conduction heat transfer phenomena in microcellular structures. This approach may prove useful in the design of low-porosity metallic components for applications specific to conduction heat transfer. |
| first_indexed | 2024-04-13T18:34:15Z |
| format | Article |
| id | doaj.art-753530ec8ab446c38b2e83c911dd41e8 |
| institution | Directory Open Access Journal |
| issn | 2666-2027 |
| language | English |
| last_indexed | 2024-04-13T18:34:15Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj.art-753530ec8ab446c38b2e83c911dd41e82022-12-22T02:34:57ZengElsevierInternational Journal of Thermofluids2666-20272022-05-0114100141Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structuresA.J. Otaru0M. Abdulkadir1A.S. Kovo2M.R. Corfield3N. Tanko4O.A. Odey5A. Kenfack6U.O. Aroke7Department of Chemical Engineering, Federal University of Technology, P.M.B. 065, Gidan-Kwanu Campus, Minna, Nigeria; Corresponding author.Department of Chemical Engineering, Federal University of Technology, P.M.B. 065, Gidan-Kwanu Campus, Minna, NigeriaDepartment of Chemical Engineering, Federal University of Technology, P.M.B. 065, Gidan-Kwanu Campus, Minna, NigeriaDepartment of Electrical & Electronic Engineering, The University of Nottingham, Nottingham, NG7 2RD, United KingdomDepartment of Petroleum and Natural Gas Engineering, Baze University, Plot 686, Cadastral Zone C 00, Jabi Airport Road Bypass, F.C.T. Abuja, NigeriaDepartment of Chemical Engineering, University of Calabar, P.M.B. 1115, Etagbor Road, Calabar, NigeriaAfrican University of Science and Technology, Km 10 Airport Road, P.M.B. 681, Galadimawa, F.C.T. Abuja, NigeriaDepartment of Chemical Engineering, Abubakar Tafawa Balewa University, P.M.B. 0248, Bauchi, NigeriaMetallic-based microcellular structures are widely used in heat and mass transfer processes owing to their unique combination of high porosity, high surface area, fixed pore morphology and high Young modulus, enabling their suitability as heat pipes in oil and gas processing equipment, biomedical materials for bone repair and bone substitution, solar collectors, fuel cells, impact loading, soundproofing materials and metallurgical processing. Accurate representation of the effective thermal conductivity of these materials is imperative in understanding their heat transfer mechanisms leading to the design and optimisation of system performance. Due to the limited availability of experimental and predictive data on heat transport phenomena across the interstices of low-porosity microcellular structures - numerically simulated data of effective thermal conductivity for conduction heat transfer in metal foam-fluid systems have been compared for structures typified by near-circular pore walls and openings, i.e. “bottleneck-type” structures and foam porosity ranging between 0.65 and 0.78. A three-dimensional high-resolution image inversion and computational fluid dynamics modelling and simulation of conductive heat transfer for both the fluid and solid domains at pore level is used to estimate effective thermal conductivity for these structures. This approach is extended to structurally-adapted metal foam-fluid systems by broadening the pore volume fraction beyond 0.90 – resulting in the quantification of the fluid phase contribution for heat transfer enhancement and the proposition of empirical constants to support models developed by Calmidi & Mahajan [9]. Findings in this work offer strong support to the supposition that geometrical adaptions of microcellular structures can be used to modulate their effective thermal conductivity and that generalised values of empirical constants may be ambiguous to fully describe conduction heat transfer phenomena in microcellular structures. This approach may prove useful in the design of low-porosity metallic components for applications specific to conduction heat transfer.http://www.sciencedirect.com/science/article/pii/S2666202722000088Microcellular metalsComputational fluid dynamicsEffective thermal conductivity |
| spellingShingle | A.J. Otaru M. Abdulkadir A.S. Kovo M.R. Corfield N. Tanko O.A. Odey A. Kenfack U.O. Aroke Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structures International Journal of Thermofluids Microcellular metals Computational fluid dynamics Effective thermal conductivity |
| title | Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structures |
| title_full | Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structures |
| title_fullStr | Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structures |
| title_full_unstemmed | Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structures |
| title_short | Three-dimensional high-resolution image inversion and pore level CFD characterisation of effective thermal conductivity of replicated microcellular structures |
| title_sort | three dimensional high resolution image inversion and pore level cfd characterisation of effective thermal conductivity of replicated microcellular structures |
| topic | Microcellular metals Computational fluid dynamics Effective thermal conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2666202722000088 |
| work_keys_str_mv | AT ajotaru threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures AT mabdulkadir threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures AT askovo threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures AT mrcorfield threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures AT ntanko threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures AT oaodey threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures AT akenfack threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures AT uoaroke threedimensionalhighresolutionimageinversionandporelevelcfdcharacterisationofeffectivethermalconductivityofreplicatedmicrocellularstructures |