An indeterministic method for calculation of soil porosity on the basis of its mechanical composition

• Autorzy: Czachor H.

Warianty tytułu

PL

Niedeterministyczna metoda obliczania porowatości gleby na podstawie składu mechanicznego

RU

Nedeterministicheskijj metod podscheta poroznosti pochvy na osnove mekhanicheskogo sostava

• Języki publikacji: EN

Abstrakty

EN

Investigations of loose grain media, i.e. of media formed of rigid particles of various sizes, often raise the problem of the relationship between the mechanical composition (particle-size composition), and the physical and mechanical parameters of the medium studied. It may be expected that the parameters are related to the geometry of solid phase of the medium, which concept covers the mutual spatial arrangement of the medium particles. The modelling of the solid phase geometry requires the introduction of certain necessary assumptions concerning the shape of the particle and the manner (type) of particle packing. It was assumed, therefore, that: a) the soil is composed of rigid spherical particles, the diameter of which, as well as quantities, are determined by the mechanical composition of the soil; b) space may be filled with tetrahedrons, the peaks of which are the centres nf four mutually tangent particles of the medium. These formed the basis for an approach to the calculation of the number of permissible configurations, and of the probability of occurence of each of them. Calculations were carried out, and the results were compared with those from an experiment concerned with porosity of the medium.

PL

Przedstawiono probabilistyczny model struktury ośrodka granularnego. Model zakłada tetraedryczny sposób upakowania cząstek ośrodka. Celem jego jest określenie porowatości na podstawie składu mechanicznego.

RU

Представлено пробабилистическую модель структуры гранулярного центра. Модель требует тетраэдрического способа упаковки частиц центра. Цель его заключается в определении порозности на основе механического состава.

• Wydawca: -
• Czasopismo: Zeszyty Problemowe Postępów Nauk Rolniczych
• Rocznik: 1989
• Tom: 378
• Opis fizyczny: p.21-28,fig.,ref.

Twórcy

autor

Czachor H.

• Institute of Agrophysics, Polish Academy of Sciences, Lublin, Poland

Bibliografia

• 1. Smith W. O., Foote P. D., Busang P. F. Packing of homogenous spheres. Physical Review. 1929, 34, 1271-1274.
• 2. Наrr M. E., Mecanique des milieux formes des particules. Press Politechnique Romandes, 1981.