Numerical Simulation of Squeezed Flow of a Viscoplastic Material by a Three-step Smoothed Particle Hydrodynamics Method

  • سال انتشار: 1392
  • محل انتشار: ماهنامه بین المللی مهندسی، دوره: 26، شماره: 4
  • کد COI اختصاصی: JR_IJE-26-4_007
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 934
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نویسندگان

p Ghalandari

Mechanical Engineering Department, Faculty of Engineering, University of Guilan, P.O. Box ۳۷۵۶, Rasht, Iran

n Amanifard

Mechanical Engineering Department, Faculty of Engineering, University of Guilan, P.O. Box ۳۷۵۶, Rasht, Iran

k Javaherdeh

Mechanical Engineering Department, Faculty of Engineering, University of Guilan, P.O. Box ۳۷۵۶, Rasht, Iran

a darvizeh

Mechanical Engineering Department, Faculty of Engineering, University of Guilan, P.O. Box ۳۷۵۶, Rasht, Iran

چکیده

In the current work, the mesh free Smoothed Particle Hydrodynamics (SPH) method, was employed to numerically investigate the transient flow of a viscoplastic material. Using this method, large deformationof the sample and its free surface boundary were captured without the cumbersome process of the gridgeneration. This three-step SPH scheme employs an explicit predictor-corrector technique and the incompressibility characteristic of the material was guaranteed by solving a pressure Poisson equation. The Papanastasiou constitutive model was also utilized in the simulations to study the compression of thesample under both constant load and constant velocity conditions. The no-slip boundary condition wassatisfied by projecting the velocity of the viscoplastic material on the wall particles. In order to validate the fidelity of this numerical method during the compression of the samples, the resultant load at constant velocity as well as the height change of the sample for a constant load were computed and compared with other published results. The results indicated that this method could be employed as a reliable technique to simulate such highly deformable viscoplastic deformation of the materials

کلیدواژه ها

SPH,Meshless Method,Viscoplastic Materials,Squeeze Flow

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