شماره ركورد كنفرانس :
4518
عنوان مقاله :
Computational Prediction of Stability of Alumina Nanoparticles Dispersed in Aqueous Medium Using Discerete Element Method
Author/Authors :
Reza Riahifar Materials and Energy Research Center,MeshkinDasht, Karaj , Touradj Ebadzadeh
كليدواژه :
Contact Mechanics , Discrete Element Method (DEM) , JKR Theory , DLVO theoty , Alumina Nanoparticle , Stability
سال انتشار :
2011
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
زبان مدرك :
انگليسي
چكيده لاتين :
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 of agglomerates, which has an important role in stability of suspension, can be predicted. In the present paper, the behavior of nanoparticles dispersed in liquid medium is investigated with discrete 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 of motion of particle. The effect of process parameters such as pH and concentration on stability of a suspension containing nano-Alumina powder dispersed in an aqueous medium is investigated theoretically and experimentally. Experimental results confirm the results obtained from mathematical model developed in this work.
كشور :
ايران
تعداد صفحه 2 :
8
از صفحه :
1
تا صفحه :
8
لينک به اين مدرک :
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