Effective Thermal Conductivity of Open Cell Polyurethane Foam Based on the Fractal Theory
Joint Authors
Source
Advances in Materials Science and Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-12-09
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Based on the fractal theory, the geometric structure inside an open cell polyurethane foam, which is widely used as adiabatic material, is illustrated.
A simplified cell fractal model is created.
In the model, the method of calculating the equivalent thermal conductivity of the porous foam is described and the fractal dimension is calculated.
The mathematical formulas for the fractal equivalent thermal conductivity combined with gas and solid phase, for heat radiation equivalent thermal conductivity and for the total thermal conductivity, are deduced.
However, the total effective heat flux is the summation of the heat conduction by the solid phase and the gas in pores, the radiation, and the convection between gas and solid phase.
Fractal mathematical equation of effective thermal conductivity is derived with fractal dimension and vacancy porosity in the cell body.
The calculated results have good agreement with the experimental data, and the difference is less than 5%.
The main influencing factors are summarized.
The research work is useful for the enhancement of adiabatic performance of foam materials and development of new materials.
American Psychological Association (APA)
Ankang, Kan& Houde, Han. 2013. Effective Thermal Conductivity of Open Cell Polyurethane Foam Based on the Fractal Theory. Advances in Materials Science and Engineering،Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-447586
Modern Language Association (MLA)
Ankang, Kan& Houde, Han. Effective Thermal Conductivity of Open Cell Polyurethane Foam Based on the Fractal Theory. Advances in Materials Science and Engineering No. 2013 (2013), pp.1-7.
https://search.emarefa.net/detail/BIM-447586
American Medical Association (AMA)
Ankang, Kan& Houde, Han. Effective Thermal Conductivity of Open Cell Polyurethane Foam Based on the Fractal Theory. Advances in Materials Science and Engineering. 2013. Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-447586
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-447586