Simulation of Water Jet Cutting for Granite by Using Smoothed Particle Hydrodynamics

Document Type : Research Article

Authors

Dept. of Mechanical Engineering, Yazd University, Yazd, Iran

10.29252/anm.2020.11204.1372

Abstract

Summary
In this paper, the rock cutting with a water jet is simulated using a Smoothed Particle Hydrodynamics method. The proposed model shows that the Smoothed Particle Hydrodynamics method is a suitable method for analysis of rock cutting with water jets.
 
Introduction
One of the most advanced methods of cutting materials is water jet cutting. Due to its advantages over other cutting methods, it has been widely used in recent years. Cutting with a water jet is a subset of fluid and structure interaction issues in which water flows into the boundaries of the rock, and this changes the shape of the rock in the impact area. In order to examine this issue accurately, the boundary conditions of water and rock must be coupled in order to obtain the correct behavior of the collision area, which is the most important and complex part of simulation by theoretical, experimental, and numerical methods.
 
Methodology and Approaches
In this paper, the rock cutting with a water jet is simulated using a smoothed particle hydrodynamics method, which is a Lagrangian numerical and meshfree method. For this purpose, firstly, the governing equations for fluid and solid are discretized with the help of the predictive-correct algorithm. Then, using the algorithm based on these equations, a two-dimensional collision of water jet and rock and breaking behavior of rock are simulated.
 
Results and Conclusions
With this method, the depth and width of the cut can be determined at different speeds of the water jet and the optimal cutting speed of the stone is obtained. The results of the simulation have acceptable accuracy compared to the experimental results and show that the smoothed particle hydrodynamics method is a suitable method for the analysis of rock cutting with water jets.

Keywords

Main Subjects

Full Text

اندرکنش سیال و سازه، اثر متقابل سازه متحرک یا تغییر شکل‌پذیر با جریان سیال است. این موضوع یکی از مباحث جذاب و کاربردی در علوم مهندسی است. به دلیل پیچیدگی حل مسئله به صورت تئوری، رویکرد محققان در برابر این پدیده، روش‌های تجربی، آزمایشگاهی و عددی است. در بیشتر این گونه مسائل، نیرو‌ها توسط جریان سیال به مرز­‌های جامد اعمال شده و هندسه مرز‌­ها را تغییر می‌دهد. در این حالت سیال با حرکت خود، به مرز‌‌های جامد نیرو وارد می‌کند، بنابراین برای تحلیل دقیق، شرایط مرزی دینامیکی دو محیط باید با هم کوپل شوند. یکی از پیشرفته‌ترین روش‌های برش مواد، روش برش با جت آب است که از سال 1970 میلادی وارد عرصه صنعت شد[1] و به علت مزایای متفاوت نسبت به سایر فناوری‌های برش (ماشین‌های تراش معمولی، برش پلاسما و لیزر) از جمله عدم ایجاد تنش‌های حرارتی در ماده هدف، انعطاف‌پذیری، نیرو‌‌های برش کوچک، سروصدای بسیار کم، ظرفیت تولید بالا و ضایعات کم در سال‌های اخیر پیشرفت شگرفی داشته است.

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Journal of Analytical and Numerical Methods in Mining Engineering
Volume 10, Issue 23
August 2020
Pages 53-63

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History

  • Receive Date: 26 December 2018
  • Revise Date: 05 August 2020
  • Accept Date: 11 August 2020

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