Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis
Under certain circumstances, flow in microchannels can exhibit compressibility effects even at Reynolds numbers (Re) around (below 2,300) and low Mach numbers (below 0.3). This is particularly true for gases, especially when the flow undergoes significant pressure changes or acceleration within the...
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| مؤلفون آخرون: | , , |
| التنسيق: | article |
| منشور في: |
2024
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://hdl.handle.net/11073/32570 |
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| _version_ | 1864513440671858688 |
|---|---|
| author | Mohammed, E. Elgack |
| author2 | Khaled, Al-Souqi Mohammad, O. Hamdan Mohamed, Abdelgawad |
| author2_role | author author author |
| author_facet | Mohammed, E. Elgack Khaled, Al-Souqi Mohammad, O. Hamdan Mohamed, Abdelgawad |
| author_role | author |
| dc.creator.none.fl_str_mv | Mohammed, E. Elgack Khaled, Al-Souqi Mohammad, O. Hamdan Mohamed, Abdelgawad |
| dc.date.none.fl_str_mv | 2024-11-24 2025-12-23T11:02:20Z 2025-12-23T11:02:20Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | Elgack, M. E., Al-Souqi, K., Hamdan, M. O., & Abdelgawad, M. (2024). Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis. International Journal of Thermofluids, 24, 100921. https://doi.org/10.1016/j.ijft.2024.100921 2666-2027 https://hdl.handle.net/11073/32570 10.1016/j.ijft.2024.100921 |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | Elsevier |
| dc.relation.none.fl_str_mv | https://doi.org/10.1016/j.ijft.2024.100921 |
| dc.rights.none.fl_str_mv | Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| dc.subject.none.fl_str_mv | Low-Mach-Number Compressible Flow Compressibility Effects Low-Reynolds-Number Flow Shallow Microchannel Microfluidics |
| dc.title.none.fl_str_mv | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis |
| dc.type.none.fl_str_mv | Peer-Reviewed Published version info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
| description | Under certain circumstances, flow in microchannels can exhibit compressibility effects even at Reynolds numbers (Re) around (below 2,300) and low Mach numbers (below 0.3). This is particularly true for gases, especially when the flow undergoes significant pressure changes or acceleration within the microchannel. This study investigates the compressibility effects encountered in two-parallel plates microchannels at these low Reynolds and Mach numbers, due to the high-pressure drop associated with the small scale of the microchannels. This uncommon flow is characterized by an exceptionally small channel diameter-to-length aspect ratio (∼10–3), resulting in a friction coefficient that deviates from the typical value for laminar flow between parallel plates (f = 96/Re). Both steady and transient effects on the flow field are examined under low Re subsonic flow, assuming continuum behavior. The ideal gas equation is used to model gas density, while the isothermal Tait-Murnaghan equation models liquid density. For gases, compressibility effects are observed primarily when the inlet pressure ratio exceeds 0.1. The results show that these effects are less pronounced for liquids, even at elevated inlet pressure ratios. Additionally, a flow delay across the channel exhibits a first-order transient response. For liquid flow, this effect depends on the channel resistance, the total fluid volume within the channel, and the liquid's bulk properties, rather than the inlet pressure ratio. |
| format | article |
| id | aus_cfa85b866f209456a8539f1035139fb9 |
| identifier_str_mv | Elgack, M. E., Al-Souqi, K., Hamdan, M. O., & Abdelgawad, M. (2024). Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis. International Journal of Thermofluids, 24, 100921. https://doi.org/10.1016/j.ijft.2024.100921 2666-2027 10.1016/j.ijft.2024.100921 |
| language_invalid_str_mv | en |
| network_acronym_str | aus |
| network_name_str | aus |
| oai_identifier_str | oai:repository.aus.edu:11073/32570 |
| publishDate | 2024 |
| publisher.none.fl_str_mv | Elsevier |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| spelling | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysisMohammed, E. ElgackKhaled, Al-SouqiMohammad, O. HamdanMohamed, AbdelgawadLow-Mach-Number Compressible FlowCompressibility EffectsLow-Reynolds-Number FlowShallow MicrochannelMicrofluidicsUnder certain circumstances, flow in microchannels can exhibit compressibility effects even at Reynolds numbers (Re) around (below 2,300) and low Mach numbers (below 0.3). This is particularly true for gases, especially when the flow undergoes significant pressure changes or acceleration within the microchannel. This study investigates the compressibility effects encountered in two-parallel plates microchannels at these low Reynolds and Mach numbers, due to the high-pressure drop associated with the small scale of the microchannels. This uncommon flow is characterized by an exceptionally small channel diameter-to-length aspect ratio (∼10–3), resulting in a friction coefficient that deviates from the typical value for laminar flow between parallel plates (f = 96/Re). Both steady and transient effects on the flow field are examined under low Re subsonic flow, assuming continuum behavior. The ideal gas equation is used to model gas density, while the isothermal Tait-Murnaghan equation models liquid density. For gases, compressibility effects are observed primarily when the inlet pressure ratio exceeds 0.1. The results show that these effects are less pronounced for liquids, even at elevated inlet pressure ratios. Additionally, a flow delay across the channel exhibits a first-order transient response. For liquid flow, this effect depends on the channel resistance, the total fluid volume within the channel, and the liquid's bulk properties, rather than the inlet pressure ratio.Elsevier2025-12-23T11:02:20Z2025-12-23T11:02:20Z2024-11-24Peer-ReviewedPublished versioninfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfElgack, M. E., Al-Souqi, K., Hamdan, M. O., & Abdelgawad, M. (2024). Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis. International Journal of Thermofluids, 24, 100921. https://doi.org/10.1016/j.ijft.2024.1009212666-2027https://hdl.handle.net/11073/3257010.1016/j.ijft.2024.100921enhttps://doi.org/10.1016/j.ijft.2024.100921Attribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/oai:repository.aus.edu:11073/325702025-12-23T11:19:59Z |
| spellingShingle | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis Mohammed, E. Elgack Low-Mach-Number Compressible Flow Compressibility Effects Low-Reynolds-Number Flow Shallow Microchannel Microfluidics |
| status_str | publishedVersion |
| title | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis |
| title_full | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis |
| title_fullStr | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis |
| title_full_unstemmed | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis |
| title_short | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis |
| title_sort | Compressibility effects in microchannel flows between two-parallel plates at low reynolds and mach numbers: Numerical analysis |
| topic | Low-Mach-Number Compressible Flow Compressibility Effects Low-Reynolds-Number Flow Shallow Microchannel Microfluidics |
| url | https://hdl.handle.net/11073/32570 |