Material Properties and Processing
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Abstract
Abstract
The paper presents a comprehensive theoretical analysis of the dewatering processes of wet dispersed materials - including food production waste such as distillery stillage, brewery spent grain, sugar beet pulp, and coffee slurry - under vibratory and vibroimpact loading. The classification of moisture binding forms in colloidal capillary-porous bodies according to Rebinder is discussed in detail, distinguishing free moisture, capillary-bound (physico-mechanical), adsorption-bound (physico-chemical), and chemically-bound moisture fractions by binding energy. Free and physico-mechanically bound moisture accounts for over 65% of the liquid phase volume and is amenable to removal by mechanical methods. The rheological physico-mechanical characteristics of wet dispersed materials - elasticity, plasticity, viscosity, cohesion, adhesion, and inertial properties - are systematically reviewed. Models based on combinations of Hooke, Newton, and Saint-Venant bodies in series and parallel configurations are described, including the Shvedov-Bingham viscoplastic model, the Kelvin and Maxwell viscoelastic models, and the Bingham elastoviscoplastic model. A phenomenological mechano-rheological model for the full elastoviscoplastic-inertial behaviour of the material is presented. The theory of static pressing is analysed, including expressions for capillary pressure, neutral and effective pressure components, and liquid outflow velocity governed by Darcy's law. The fundamentals of vibratory loading are presented, with particular attention to conditions for transition into pseudofluidisation and vibroboiling states, effects of particle size and moisture content on required loading parameters, and the role of static punch pressure in suppressing lower-layer loosening. The governing equations of motion for dispersed systems under two-component harmonic vibration are formulated, and the energy balance method for linearising nonlinear damping is described. The study establishes the complete theoretical basis for systematic optimisation of vibratory and vibroimpact loading parameters to achieve maximum dewatering efficiency for food production waste materials.
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@article{Sevostianov2026RESEARCH,
title = {RESEARCH INTO DEWATERING PROCESSES OF WET DISPERSED MATERIALS UNDER VIBRATORY AND VIBROIMPACT LOADING},
author = {Ivan Sevostianov},
journal = {Vibrations in engineering and technology},
year = {2026},
doi = {10.37128/2306-8744-2026-2-2},
url = {https://doi.org/10.37128/2306-8744-2026-2-2}
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