Longitudinal Heat Transfer Enhanced by Fluid Oscillation in a Circular Pipe with Conductive Wall

• Published in: Transactions of the Japan Society of Mechanical Engineers Series B Vol. 68; no. 676; pp. 3439 - 3444
• Main Authors: INABA, Takehiko, MORITA, Goushi, SAITOH, Ken-ichi
• Format: Journal Article
• Language: Japanese
• Published: The Japan Society of Mechanical Engineers 2002
• Subjects: Analytical Solution
• ISSN: 0387-5016; 1884-8346
• DOI: 10.1299/kikaib.68.3439

The longitudinal heat transfer in capillary pipes is enhanced by fluid oscillation. The analytical solution to this phenomenon is obtained considering the wall thermal conductivities. Based on this solution, the effects of wall conductivity and thickness are investigated for the case of large amplitude of fluid motion. The longitudinal heat transfer through the fluid part is more enhanced with highly conductive thick pipes. This is because the radial region where the heat is transferred backward is smaller with these pipes. The direction of longitudinal heat transfer depends on the phase difference of temporal change between the velocity and temperature; whether it exceeds π/2, or not. From this point of view, the most effective wall to this problem is presented, where the wall temperature does not change preserving the mean temperature of the location during the oscillation.