Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 55 8 2023 10 23 Numerical modeling of rock cutting with abrasive waterjet to determine the optimal parameters affecting cutting depth and volume Numerical modeling of rock cutting with abrasive waterjet to determine the optimal parameters affecting cutting depth and volume 971 994 5312 10.22060/mej.2023.22439.7619 FA Satar Mahdevari Department of Mining Engineering, Amirkabir University of Technology, Tehran, Iran 0000-0002-2934-9500 Pedram Bakhtiari HaftLang Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan, Iran Habib Sayehvand Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan, Iran 0000-0003-1554-1128 Journal Article 2023 06 03 In this research, the optimal parameters have been investigated with the aim of increasing the efficiency and improving the quality of rock cutting using an Abrasive Water Jet (AWJ) through the modeling of high-velocity two-phase flow (water and abrasive). The rock-cutting process by AWJ has been simulated using the combined finite element method-smoothed particle hydrodynamics in LS-DYNA software. For this purpose, the effect of parameters of jet velocity, dwell time, changes in volumetric concentration, and changes in the diameter of abrasive particles on the cutting depth and cutting volume of siltstone and shale rock specimens have been investigated. Numerical modeling results showed that with increasing velocity, the cutting depth and cutting volume increased. As the dwell time increases, the energy used by the AWJ to cut the rock increases, which would lead to an increase in the depth and volume of the cut. By increasing the volumetric concentration of abrasive particles up to 3%, the depth and volume of the cut increased with a gentle slope, and after that, no significant improvement was observed. Also, by increasing the diameter of the abrasive particles up to 1.25 mm for siltstone and 1 mm for shale, the depth and volume of the cut increased at first, and after that, they remained constant or decreased. In this research, the optimal parameters have been investigated with the aim of increasing the efficiency and improving the quality of rock cutting using an Abrasive Water Jet (AWJ) through the modeling of high-velocity two-phase flow (water and abrasive). The rock-cutting process by AWJ has been simulated using the combined finite element method-smoothed particle hydrodynamics in LS-DYNA software. For this purpose, the effect of parameters of jet velocity, dwell time, changes in volumetric concentration, and changes in the diameter of abrasive particles on the cutting depth and cutting volume of siltstone and shale rock specimens have been investigated. Numerical modeling results showed that with increasing velocity, the cutting depth and cutting volume increased. As the dwell time increases, the energy used by the AWJ to cut the rock increases, which would lead to an increase in the depth and volume of the cut. By increasing the volumetric concentration of abrasive particles up to 3%, the depth and volume of the cut increased with a gentle slope, and after that, no significant improvement was observed. Also, by increasing the diameter of the abrasive particles up to 1.25 mm for siltstone and 1 mm for shale, the depth and volume of the cut increased at first, and after that, they remained constant or decreased. https://mej.aut.ac.ir/article_5312_5e0f17d9e09d1881692cf84a3b869f75.pdf