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گواهی نمایه سازی مقاله Computational Prediction of Stability of Alumina Nanoparticles Dispersed in Aqueous Medium Using Discerete Element Method

عنوان مقاله: Computational Prediction of Stability of Alumina Nanoparticles Dispersed in Aqueous Medium Using Discerete Element Method
شناسه (COI) مقاله: ICHEC07_216
منتشر شده در هفتمین کنگره ملی مهندسی شیمی در سال ۱۳۹۰
مشخصات نویسندگان مقاله:

Reza Riahifar - Department of Ceramics, Materials and Energy Research Center,MeshkinDasht, Karaj, P. O.Box 14155-4777
Touradj Ebadzadeh - Department of Ceramics, Materials and Energy Research Center,MeshkinDasht, Karaj, P. O.Box 14155-4777

خلاصه مقاله:
It is known that stability of ceramic suspensions during forming process can influence strength and porosity content of final products. Theoretical methods are suitable for studying stability of nanoparticles in the suspension. In these methods, the contact between particles and formation ofagglomerates, which has an important role in stability of suspension, can be predicted. In thepresent paper, the behavior of nanoparticles dispersed in liquid medium is investigated withdiscrete element method. In this numerical method, first, forces such as Brownian, Buoyancy, friction, cohesion, contact, van der Waals attraction and electrostatic repulsion acting on each particle are calculated. Next, particle trajectory is determined with integrating from equation ofmotion of particle. The effect of process parameters such as pH and concentration on stability of asuspension containing nano-Alumina powder dispersed in an aqueous medium is investigatedtheoretically and experimentally. Experimental results confirm the results obtained from mathematical model developed in this work.

کلمات کلیدی:
Contact Mechanics, Discrete Element Method (DEM), JKR Theory, DLVO theoty,Alumina Nanoparticle, Stability

صفحه اختصاصی مقاله و دریافت فایل کامل: https://www.civilica.com/Paper-ICHEC07-ICHEC07_216.html