ISSN Online: 2377-424X
ISBN Print: 978-1-56700-474-8
ISBN Online: 978-1-56700-473-1
International Heat Transfer Conference 16
THERMAL RESISTANCE OF NANOPARTICLE LAYER DEPOSITED SOLID-LIQUID INTERFACE
要約
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.