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https://hdl.handle.net/11147/10194
Title: | Local Heat Transfer Control Using Liquid Dielectrophoresis at Graphene/Water Interfaces | Authors: | Yenigün, Onur Barışık, Murat |
Keywords: | Electro-freezing Electro-wetting Kapitza resistance Nanoscale heat transfer Phonon transport |
Publisher: | Elsevier Ltd. | Abstract: | Graphene-based materials are considered for the solution of the thermal management problem of current and next generation micro/nano-electronics with high heat generation densities. However, the hydrophobic nature of few-layer graphene makes passing heat to a fluid very challenging. We introduced an active and local manipulation of heat transfer between graphene and water using an applied, non-uniform electric field. When water undergoes electric field induced orientation polarization and liquid dielectrophoresis, a substantial increase in heat transfer develops due to a decrease in interfacial thermal resistance and increase in thermal conductivity. By using two locally embedded pin and plate electrodes of different sizes, we demonstrated a two-dimensional heat transfer control between two parallel few-layer graphene slabs. We obtained local heat transfer increase up to nine times at pin electrode region with an ultra-low Kapitza resistance through the studied non-uniform electric field strength range creating highly-ordered compressed water in the experimentally measured density limits. With this technique, heat can be (i) distributed from a smaller location to a larger section and/or (ii) collected to a smaller section from a larger region. Current results are important for hot spot cooling and/or heat focusing applications. © 2020 | URI: | https://doi.org/10.1016/j.ijheatmasstransfer.2020.120801 https://hdl.handle.net/11147/10194 |
ISSN: | 0017-9310 1879-2189 |
Appears in Collections: | Mechanical Engineering / Makina Mühendisliği Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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1-s2.0-S001793102033739X-main.pdf | 11.83 MB | Adobe PDF | View/Open |
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