Influence of Porous Material MR Structure on its Flow Characteristics

• Published in: IOP conference series. Materials Science and Engineering 2018-01, Vol.302 (1), p.12074
• Main Authors: Zhizhkin, A M, Lazutkin, G V, Davydov, D P, Volkova, T D
• Format: Article
• Language: English
• Subjects: Flow characteristics; Fluid dynamics; Hydraulics; Hydrodynamic equations; Liquid flow; Macrostructure; Mathematical analysis; New technology; Nonuniformity; Parameters; Porous materials; Solid phases
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/302/1/012074

Existing presentation of MR (metal rubber) material structure by its hydraulic (average) diameter of inner space for hydrodynamic equations is non-complete for understanding of influence of structure on hydrodynamic characteristics of MR material. Analysis of existing results of MR structure researches for porous structures shows that relative geometrical size of porous structure provides large influence on its average diameter. Therefore, it is proposed in a present research to determine a thick-wall and thin-wall porous details made of MR material. It is shown that placement of elements of solid phase is connected with value of parameter of density of pore distribution by size α, which is typical for gamma-distribution. Thus, it is proposed to use the dimensionless parameter α as characteristics of non-uniformity of MR material macrostructure. It is proved that for hydraulic equations the structure of porous detail made of material MR for direction perpendicular to liquid flow is determined univalent by effective hydraulic diameter proposed in the present paper. This diameter depends not only on average pores diameter but on parameter α too. Generalized dependency is obtained; it is possible to use it for calculation of hydraulic losses both in thick-wall and thin-wall details made of MR material by well-known and new technologies of manufacturing.