Thermal Wave in Thermal Properties Measurements and Flow Diagnostics: With Applications of Nanofluids Thermal Conductivity and Wall Shear Stress Measurements

Wang, Zhefu

ISBN 10: 363914709X / ISBN 13: 9783639147094

Edité par VDM Verlag, 2009

In. N° de réf. du vendeur ria9783639147094_new

Synopsis :

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. Our measurement 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.

Présentation de l'éditeur: 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. Our measurement 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.

Détails bibliographiques

Titre : Thermal Wave in Thermal Properties ...
Éditeur : VDM Verlag
Date d'édition : 2009
Reliure : Couverture souple
Etat : New