# An Analytical Model for Predicting the Effective Thermal Conductivity of Woven Wire Wick Structure

• Lee, Jin-Sung (Computational Science ＆ Engineering(CSE) Center, Sansung Advanced Institute of Technology) ;
• Kim, Chul-Ju (School of Mechanical Engineering, Sungkyunkwan University)
• Published : 2002.06.01

#### Abstract

Woven wire wick is a very effective structure because of its easiness to insert inside of pipe for a miniature heat pipe. The present study was conducted to predict the porosity and the effective thermal conductivity of liquid-saturated woven wire wick. The porosity and the effective thermal conductivity of the evaporator region indicate different values from those of the condenser region due to the existence of non-flow region. The minimum value of the effective thermal conductivity indicates on condition of the $\theta$=$45^{Wcirc}$ and the values of the effective thermal conductivity increases symmetrically centering around the minimum value. The values of the effective thermal conductivity in the evaporator region at the angle of $45^{Wcirc}$ indicate about 60~80% higher than those in the condenser region for various combinations of copper, and stainless with water and ethanol.

#### References

1. Noda, H. and Kumagai, M., 1999, Effect of mesh shape on maximum capillary pressure of plain weave screen, Proceedings of the 11th International Heat Pipe Conference, pp. 85-98
2. Sauciuc, I., Mochizuki, M., Mashiko, K., Saito, Y. and Nguyen, T., 1999, The design and testing of an improved wick structure to be used in heat pipes for electronic cooling application, Proceedings of the 11th International Heat Pipe Conference, pp. 61-65
3. Bazzo, E., Reimbrecht, E. G. and Fernandes, C. P., 1999, Manufacturing procedure and porous structure characterization of tubular wicks, Proceedings of the 11th International Heat Pipe Conference, pp. 264-268
4. Akihiro, S., 1999, A flexible heat pipe with carbon fiber arterial wick, Proceedings of the 11th International Heat Pipe Conference, pp. 119-123
5. Zuo, Z. J. and North, M. T., 1999, Improved heat pipe performance using graded wick structures, Proceedings of the 11th International Heat Pipe Conference, pp. 80-84
6. Faghri, A., 1995, Heat Pipe Science and Technology, Taylor & Francis
7. Chi, S. W., 1976, Heat Pipe Theory and Practice, Hemisphere Publishing Corporation
8. Dunn, P. D. and Reay, D. A., 1994, Heat Pipes. Pergamon Press, 4th edition