Flow Behavior of Thixoplastic Semisolid Alloy Slurry in a Channel Coated by Poroelastic Lining
Publish place: 9th International Conference & Exhibition on Materials Science & Metallurgical Engineering (iMat2020)
Publish Year: 1399
نوع سند: مقاله کنفرانسی
زبان: English
View: 442
This Paper With 14 Page And PDF Format Ready To Download
- Certificate
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
IMES14_110
تاریخ نمایه سازی: 1 دی 1399
Abstract:
Pressure-driven laminar flow of a thixo-viscoplastic semi-solid slurry obeying Houska model is theoretically investigated under steady (fully-developed) condition in a two-dimensional channel coated by a thick poroelastic lining. Treating the poroelastic layer as a two-phase solid/liquid material, bi-phasic mixture theory is used to determine the velocity of the Newtonian fluid (e.g., air) trapped in the pores of this linearly-elastic layer. The main objective of the work is to investigate the effect of semi-solid’s properties (viscosity ratio, decay ratio, and yield stress) on the velocity profile and/or flow rate for a given pressure gradient. We are as well interested in the effect of porosity and permeability of the layer for given elastic modulus on the velocity profile of the slurry. A highly nonlinear ODE is derived for the velocity gradient which is solved numerically using finite-difference method subject to appropriate interfacial boundary conditions. The results show that an increase in the ratio of zero-shear-viscosity to infinite-shear-viscosity has a retarding effect on the flow. On the other hand, an increase in the decay parameter (which means a weakening of thixotropic effect) has an accelerating effect on the flow. As expected, an increase in zero-shear yield stress also has a retarding effect on the flow. In cases where it is not possible to have any control on the thixo-viscoplastic behavior of the semi-solid slurry, it is suggested that the flow rate can be increased using more porous and/or more permeable layers.
Keywords:
Authors
Mohammad Pouriafar Chelikdani
Assistant Professor, Dept. of Mech. Engineering, University of Tehran, Rezvanshar, ۴۳۸۴۱-۱۱۹, Gilan, Iran
Morteza Safarifard
PhD Student, School of Mechanical Engineering, University of Tehran, Tehran, Iran
Nikoo Pilehroudi
BSc Student, Materials Science and Engineering, Islamic Azad University, Tehran, Iran
Kayvan Sadeghy
Professor, School of Mechanical Engineering, University of Tehran, Tehran, Iran