Effective thermal conductivity and inner transfer surface of porous and fibrous materials on the example of foodstuffs

Abstract

Analytical evaluation the effective thermal conductivity of porous and fibrous materials is difficult due to the complexity of the structures, which leads to idealization and simplification of its parameters. Macro-quantum thermodynamic calculation method (MQTM) uses well known fundamental constants and requires no approximate factors. This ensures accuracy of calculations. MQTM also makes it possible to determine the internal (effective) specific surface for heat or mass transfer, which could not be evaluated experimentally. The results of the analysis calculation are given in graphical form. The calculation results confirm the efficiency of the method and demonstrate the basic relationship between physical constants and macroscopic quantum parameters. The presented information opens up a new approach for the evaluation and modeling of heat and mass transfer processes for various purposes.

Keywords

• effective thermal conductivity, capillary-porous materials, fibrous materials, engineering calculation method, macro-quantization