Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 31, No. 7 (July 2018) 1454-1462    Article in Press

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  EULERIAN AND LAGRANGIAN SIMULATION OF PARTICLE CAPTURE AND DENDRITE FORMATION ON BINARY FIBERS
 
S. Akbarnezhadnesheli, A. Soltani Goharrizi and M. Salmanzadeh
 
( Received: December 12, 2017 – Accepted: February 08, 2018 )
 
 

Abstract    This study presents an algorithm for 2-D simulation of particle deposition and dendrite formation by developing of Euler-Lagrange solver of OpenFOAM. The effect of the various arrangement and distance between centers of binary fibers with diameter of 2µm and 500nm is investigated on the particle capture process upon diffusion and interception mechanisms. In the instantaneous filtration of a single fiber, the result from extended solver is in good agreement with the exiting model. The adding of nanofiber to microfiber just causes higher capture efficiency at the cross arrangement with fibers distance 2µm upon diffusion mechanism. When the interception mechanism is effective on the particle capture, binary fibers have higher capture efficiency and pressure drop than the single microfiber at all arrangements especially for the fiber distance 1.5 µm. the good fibers arrangement here seems the cross arrangement with the higher capture efficiency and average pressure drop in the fibers distance 2 µm. Also, at the cross and vertical arrangement of binary fibers, the location of the dendrite chains moves from 45o of microfiber surface to middle of it.

 

Keywords    binary fibers, Euler-Lagrange, Dendrite formation, Deposition mechanisms.

 

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