Multiphase modelling of core shooting process

Abstract

A multiphase model was applied to simulate a core shooting process numerically. At the beginning of the research programme, simulations of the core shooting process with simple core box geometry (e.g. cylindrical core box) were carried out to examine the general applicability of the model used. In the next stage, simulations of core box geometry with complex flow behaviour of the sand-air motion were carried out to test the possibility of application of the model to industrial core box geometries. All the simulations were done in two and three dimensions. Experiments were carried out to validate the simulation results. Good agreement between simulation and experimental results indicates that the implemented multiphase model is suitable for modelling the core shooting process. Finally, the results of the simulation of core shooting of industrial core (wheel hub) are presented.IJCMR/538

Influence of core sand properties on flow dynamics of core shooting process based on experiment and multiphase simulation

“…According to Benyahia et al [15] , the specularity coefficient φ was set to be 0.002, which was a nearly-free slip boundary condition. The angle of internal friction,φ, was set to be 0.3 according to Winartomo et al [5] .…”

“…Besides experimentation, numerical simulation was also applied to study the flow dynamics of the core shooting process. Wu et al [3][4] and Winartomo et al [5] modeled the core shooting process with the kinetic theory of granular flow (KTGF) [8][9][10] and the sand flow behaviors were predicted well at dilute regions. Ni et al [6][7] applied a two-fluid model (TFM) with a kineticfrictional constitutive correlation to simulate the core shooting process.…”

“…High speed photography has been applied in the core shooting process by few researchers [3][4][5] . However, their experiments lacked systematization and were only used to qualitatively validate simulation results.…”

Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method

“…The blowing process [1][2][3][4][5][6][7][8] of molding sand compaction and its hardening (during which, a sand-air flux is introduced into a mold cavity and followed by successive flows of air and a hardening factor -one after another -into venting holes) is burdened with at least two disadvantages. The first one constitutes the diversification of the molding sand compaction within the core volume, especially visible when the sand is shot through individual shooting holes, since it leads to a significantly higher apparent density in the shooting hole axis.…”

GPU based numerical simulation of core shooting process

“…High speed photography has been applied in the core shooting by a few researchers [5] . Wu et al [6] and Winartmo et al [7] applied a high-speed camera to photograph sand flow behavior, and their results provided qualitative validation. Systematic experiments were carried out by Ni et al and practical conclusions were drawn based on quantitive results [2,3] .…”