Research of Rheological Properties Elastic-Viscoplastic Liquid in Pipes

Abstract

In paper, a model was proposed that describes the elastic-viscous-plastic properties of liquids, which sequentially connects the elastic and viscous-plastic element. For such a medium, the total stress will be the sum of the stress corresponding to elastic deformation and the stress caused by the viscousplastic resistance. Based on the proposed model, an equation is obtained taking into account the coefficient of volumetric elastic expansion, an equation is obtained for determining the velocity over the cross section of the pipe and the volumetric flow rate for a given liquid. The calculations showed that with an increase in compressibility, the fluid flow partially increases, which in some practical cases has a positive effect.