A 3D unsteady state numerical model of heat transfer in the circumferential laser oxygen cutting of pipes wasdeveloped. In order to minimize the computing time required for solving the finite difference equations as m...A 3D unsteady state numerical model of heat transfer in the circumferential laser oxygen cutting of pipes wasdeveloped. In order to minimize the computing time required for solving the finite difference equations as much aspossible, the alternating direction implicit (ADI) method was adopted. Based on the characteristics of the pipe cuttingprocess, the periodic boundary condition was applied to calculate the temperature distribution in the θ direction andthe self-adaptive grid technology was also used. The mathematical model takes account of the temperature-dependentthermal properties of the pipe. The calculated kerfs width and the heat-affected zone (HAZ) were compared withthe experimental results.展开更多
文摘A 3D unsteady state numerical model of heat transfer in the circumferential laser oxygen cutting of pipes wasdeveloped. In order to minimize the computing time required for solving the finite difference equations as much aspossible, the alternating direction implicit (ADI) method was adopted. Based on the characteristics of the pipe cuttingprocess, the periodic boundary condition was applied to calculate the temperature distribution in the θ direction andthe self-adaptive grid technology was also used. The mathematical model takes account of the temperature-dependentthermal properties of the pipe. The calculated kerfs width and the heat-affected zone (HAZ) were compared withthe experimental results.
