access icon openaccess Numerical simulation analysis of four-stage variable diameter pipe for solid–liquid two-phase abrasive flow

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 05/02/2020, Accepted 22/05/2020, Published 11/08/2020

By exploring the effects of energy and velocity under different inlet speeds and abrasive concentrations, different inlet boundary conditions were selected for numerical analysis, and the intrinsic properties of the solid–liquid two-phase abrasive flow research and development calibre pipes were explored. The influence of law and process characteristics of solid–liquid two-phase abrasive flow is discussed. The fourth-order variable diameter pipe is taken as the research object. It is concluded that the inlet velocity is increased, the total energy and kinetic energy of the abrasive grains are also increased, and the total energy and kinetic energy are increased. The more intensely the abrasive grains collide with the workpiece wall, the more favourable is the effect of the abrasive flow on the wall surface finishing, and the increase of the abrasive concentration. The number of collisions of the disordered abrasive grains on the wall surface is increased, which is more conducive to the wall surface. The finishing process provides theoretical reference and technical support for the engineering application of solid–liquid two-phase abrasive flow.

Inspec keywords: two-phase flow; flow simulation; pipes; abrasion; computational fluid dynamics; surface roughness; quality control; abrasives; numerical analysis; polishing; surface finishing; pipe flow

Other keywords: different inlet speeds; solid–liquid two-phase abrasive flow research; abrasive grains collide; abrasive concentration; fourth-order variable diameter pipe; four-stage variable diameter pipe; different inlet boundary conditions; disordered abrasive grains; kinetic energy; total energy; development calibre pipes; numerical simulation analysis

Subjects: Surface treatment and coating techniques; Applied fluid mechanics; Fluid mechanics and aerodynamics (mechanical engineering); Numerical approximation and analysis; Machining

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