Gudul has been used since it was invented, and will be used continuously. But recently, we used rarely. One of the this reason is unequally floor temperature in Gudle because the distribution of heating air is not constant. So flow field in Gudul must be known for uniform temperature in floor. Recently, many fluid engineer have been performed the numerical analysis for the understanding of thermal and flow field based on the development of CFD(Computational Fluid Dynamics). In this paper, to find out the variation of temporal temperature in floor of traditional Gudle, we have performed numerical analysis. Initial temperature in floor is 20 t:' after 880 seconds later, maximum temperature become 2i.Oi t:'. ihour later, maximum temperature in floor become 34.5 t:' because continuously increase from 880 seconds.

1. Introduction
 2. Governing equation and numerical procedure
 3. Analysis Model and Boundary Condition
  3.1 Analysis Model
  3.2 Boundary Condition
 4. Results and Discussions
 5. Conclusion
 Acknowledgment
 Reference

• Jun Jung PaJk(Department of Mechanical & information Engineering, Graduate School University of Seoul, Seoul, Korea.)
• Shin-Ho Rhee(Department of rural engineering, Chungbuk National University,)
• Gwang Hoon Rhee(Department of Mechanical & information Engineering, University of Seoul., Seoul, Korea,) Corresponding author