Vol 8, No 3 (2017) > Mechanical Engineering >

Algorithm of Pores Distribution Model for Analysis and Measurement of Thermal Conductivity of Polypropylene Porous Material

Muhammad Zulkarnain, M.A. Fadzil, Rahida Sharudin

 

Abstract: In the current study,
algorithm pore distribution models of porous material are developed for insulator application through
establishing the effects of pore shape, content and size, which acts as an expression of the nature of porous material. The arrangement of pore distribution in the
polypropylene (PP) system is determined by various irregular shape studies. The
model is simulated through representative volume elements (RVEs) with the pore content, which
is set in the range of 5-24 vol.%, while the pore sizes are used around 0.2, 2 and 3 mm of diameter size. A
significant improvement in the optimization of the insulator model is showed by
synergistic effect on decreasing thermal conductivity in increasing the content
of the
pores. The results obtained show that the various irregular shapes of
porous material produce various final results in thermal conductivity. The
thermal conductivity of the porous material that contained 24 vol.% of pores
significantly
improved from 0.22 W/m.K to 0.158 W/m.K. Comparison of the simulation showed
that the data matched well with the Maxwell-Eucken and Hashin–Shtrikman bounds
models.
Keywords: Finite element analysis; Polypropylene; Porous material; Representative volume elements; Thermal conductivity

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