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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

THERMAL RESISTANCE OF NANOPARTICLE LAYER DEPOSITED SOLID-LIQUID INTERFACE

Get access (open in a dialog) DOI: 10.1615/IHTC16.tpm.022135
pages 8621-8628

摘要

Solid-liquid interfacial thermal resistance is one of key phenomena in the microscopic system where the interface plays a role in thermal transport. Interface structure and wettability influence the interfacial thermal resistance (ITR). A nanoparticle layer deposited on the solid-liquid interface may influence the ITR. In the present study, we experimentally evaluated a thermal resistance of the solid-liquid interface, as well as the interface with the nanoparticle layer deposited. Our experimental apparatus consisted of a stainless container filled with a target fluid, equipped with thermocouples to monitor temperatures profiles of the target fluid as well as interface substrate temperatures. By means of temperature gradient method, we evaluated the ITR of a base fluid, which is Heat Transfer Salt (HTS), and the thermal resistance of HTS with a zirconia nanoparticle layer deposited on the stainless steel substrate. In the present study, we investigated a change in the thermal resistance with the nanoparticle layer deposition, and with change in an interface temperature. It turned out that the nanoparticle deposition decreased the overall thermal resistance at the interface, which included the interface and the deposited nanoparticle layer. In addition, the overall thermal resistance became less dependent on the interface temperature. On the other hand, the ITR without the nanoparticle layer deposition decreased as the interface temperature increased. The present experimental results indicated the possibility that the nanoparticle layer deposition might have changed a state of the solid-liquid interface, and thus influenced the ITR and its characteristics.