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Thermal Wave in Thermal Properties Measurements and Flow Diagnostics
Englisch
190 b
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Hardcover
127.62
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The thermal wave technique has been explored for the§use of liquid thermal conductivity measurement and§flow property diagnostics in this dissertation. For§liquid thermal conductivity measurements, an§experimental technique based on the thermal wave§approach is developed. An aqueous fluid consisting of§gold nanoparticles was tested and anomalous thermal§conductivity enhancement was observed. Ourmeasurement results also showed a divergence of§thermal transport behavior between nanofluids and§pure liquids. §For the study of flow property diagnostics, a heat§transfer system with a periodic boundary condition in§a steady flow field is examined. Due to linearity and§homogeneity of the heat transfer system under certain§conditions, a thermal wave field generated by a§periodic heating flux at the boundary of the flow§field may be used to detect important flow field§parameters, such as the velocity gradient at the§wall, and therefore, the wall shear stress.
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Englisch
