국내 최대 기계 및 로봇 연구정보

기술보고서

기술보고서 게시판 내용
타이틀	On the Effective Thermal Conductivity of Porous Packed Beds with Uniform Spherical Particles
저자	Kandula, Max
Keyword	INCLUSIONS;; POROSITY;; SOLIDS;; THERMAL CONDUCTIVITY;; WATER
URL	http://hdl.handle.net/2060/20100036467
보고서번호	KSC-2010-007
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	Point contact models for the effective thermal conductivity of porous media with uniform spherical inclusions have been briefly reviewed. The model of Zehner and Schlunder 񢈲) has been further validated with recent experimental data over a broad range of conductivity ratio from 8 to 1200 and over a range of solids fraction up to about 0.8. The comparisons further confirm the validity of Zehner-Schlunder model, known to be applicable for conductivity ratios less than about 2000, above which area contact between the particles becomes significant. This validation of the Zehner-Schlunder model has implications for its use in the prediction of the effective thermal conductivity of water frost (with conductivity ratio around 100) which arises in many important areas of technology.