Based on the combination of computational fluid dynamics (CFD), fluid–solid coupling theory, double-temperature model, C ++ programming and OpenFOAM simulation, this paper investigated the reflection and stratified absorption phenomenon of 10 ps pulsed laser on the surface of materials, calculated the laser reflectivity and stratified absorption coefficient as variables with electron and lattice temperature then innovatively added the calculating module of these variables to the laser processing simulation model. This paper also designed an functional module to simulate the multiple reflection and absorption phenomenon of deep-hole topography to pulsed laser and add it to the simulation model. Furthermore, the energy distribution algorithm in the model which aims at calculating the occupying ratio of energy used in Coulomb explosion and thermal effects has been also modified. The research results combined with experimental verification present that the modified simulation model has a higher accuracy than the original one, which proves that the laser-solid interactions mentioned above have large impacts on the precision of laser processing simulation. It is also proved that the modified energy distribution algorithm is more effective on improving the simulation accuracy than the original one. To sum up, a much more reliable simulation model which has the potential to guide the actual laser processing has been established.

基于计算流体动力学（CFD），流固耦合理论，双温度模型，C ++编程和OpenFOAM仿真的组合，本文研究了10 ps脉冲激光在材料表面的反射和分层吸收现象。 ，用电子和晶格温度计算出激光反射率和分层吸收系数作为变量，然后创新地将这些变量的计算模块添加到激光加工仿真模型中。本文还设计了一个功能模块，模拟深孔形貌对脉冲激光的多次反射和吸收现象，并将其添加到仿真模型中。此外，该模型中旨在计算库仑爆炸和热效应所用能量占比的能量分配算法也进行了修改。研究结果与实验验证相结合，表明改进后的仿真模型比原始仿真模型具有更高的精度，证明了上述的激光-固体相互作用对激光加工仿真的精度影响很大。事实证明，改进的能量分配算法在提高仿真精度上比原始算法更有效。综上所述，已经建立了一个更可靠的仿真模型，该模型具有指导实际激光加工的潜力。结合实验验证的研究结果表明，改进后的仿真模型比原始仿真模型具有更高的精度，证明了上述的激光-固体相互作用对激光加工仿真的精度有很大的影响。事实证明，改进的能量分配算法在提高仿真精度上比原始算法更有效。综上所述，已经建立了更可靠的仿真模型，该模型具有指导实际激光加工的潜力。结合实验验证的研究结果表明，改进后的仿真模型比原始仿真模型具有更高的精度，证明了上述的激光-固体相互作用对激光加工仿真的精度有很大的影响。事实证明，改进的能量分配算法在提高仿真精度上比原始算法更有效。综上所述，已经建立了一个更可靠的仿真模型，该模型具有指导实际激光加工的潜力。事实证明，改进的能量分配算法在提高仿真精度上比原始算法更有效。综上所述，已经建立了一个更可靠的仿真模型，该模型具有指导实际激光加工的潜力。事实证明，改进的能量分配算法在提高仿真精度上比原始算法更有效。综上所述，已经建立了一个更可靠的仿真模型，该模型具有指导实际激光加工的潜力。