Heat Transfer and Hydrodynamics of Miscible/Immiscible Systems in Microchannel Devices
| dc.contributor.advisor | Azaiez, Jalel | |
| dc.contributor.advisor | Gates, Ian D. | |
| dc.contributor.author | Soleimani, Rasa | |
| dc.contributor.committeemember | Chen, Zhangxing (John) | |
| dc.contributor.committeemember | Zargartalebi, Mohammad | |
| dc.date | 2022-11 | |
| dc.date.accessioned | 2022-09-14T20:43:31Z | |
| dc.date.available | 2022-09-14T20:43:31Z | |
| dc.date.issued | 2022-09 | |
| dc.description.abstract | Electronic devices have been and still are inseparable parts of our lives, such as computers, TVs, air conditioners and gaming consoles. It is expected that in the near future, the heat flux dissipated from integrated circuits and other electronic devices increase significantly. Hence, efficient solutions need to be proposed to prevent the abovementioned problems and provide efficient cooling. Regarding the geometrical design of the cooling system, amongst various methods to improve the rate of heat transfer, the use of microchannel devices has proven to be the most effective way. On the other hand, and especially with the advent of new technologies and the requirement for big-data analysis and parallel computing, high-computational-power-demanding devices such as GPU (Graphical Processing Unit)-based computers require proper coolants with high thermal conductivities. Furthermore, while it has been proven that multiphase flows can lead to better heat transfer enhancement, most studies in the literature on flow in microchannels are on single-phase flows. In this research, and with a focus on the microchannel devices, the heat transfer enhancement and the associated hydrodynamics for both the single-phase/miscible and multiphase/immiscible systems have been studied. This work starts with the effect of the nanoparticles (NPs) on heat transfer enhancement in microchannel devices. The NPs non-homogeneous distribution and their impact on the heat removal and the friction factor has been studied and analyzed. Furthermore, and with focusing on immiscible systems, the heat transfer and hydrodynamics of the non-isothermal immiscible Rayleigh-Taylor instability (RTI), and immiscible slug flow based microchannels have been investigated in two sub-sections. In the first sub-section, it has been shown that thermocapillary effect can have a significant effect on the evolution of the instability, and results in its suppression. In the second sub-section, the results show that the immiscible slug flow-based systems systematically have higher heat removal performance compared to the similar single-phase/miscible systems. The effect of a modified flow configuration, namely the alternating slug injection on heat transfer enhancement has been studied and analyzed in this sub-section. | en_US |
| dc.identifier.citation | Soleimani, R. (2022). Heat transfer and hydrodynamics of miscible/immiscible systems in microchannel devices (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. | en_US |
| dc.identifier.uri | http://hdl.handle.net/1880/115223 | |
| dc.identifier.uri | https://dx.doi.org/10.11575/PRISM/40242 | |
| dc.language.iso | eng | en_US |
| dc.publisher.faculty | Schulich School of Engineering | en_US |
| dc.publisher.institution | University of Calgary | en |
| dc.rights | University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. | en_US |
| dc.subject | Heat and Mass Transfer | en_US |
| dc.subject | Nanofluid Flow | en_US |
| dc.subject | Microchannel Devices | en_US |
| dc.subject | Hydrodynamic Instability | en_US |
| dc.subject.classification | Fluid and Plasma | en_US |
| dc.subject.classification | Engineering--Chemical | en_US |
| dc.subject.classification | Engineering--Petroleum | en_US |
| dc.title | Heat Transfer and Hydrodynamics of Miscible/Immiscible Systems in Microchannel Devices | en_US |
| dc.type | doctoral thesis | en_US |
| thesis.degree.discipline | Engineering – Chemical & Petroleum | en_US |
| thesis.degree.grantor | University of Calgary | en_US |
| thesis.degree.name | Doctor of Philosophy (PhD) | en_US |
| ucalgary.item.requestcopy | true | en_US |