通过通用微分方程逼近Maxey-Riley-Gatignol方程中的Basset力 / Approximation of the Basset force in the Maxey-Riley-Gatignol equations via universal differential equations
1️⃣ 一句话总结
这篇论文提出了一种新方法,使用神经网络来近似模拟流体中粒子运动方程里一个复杂的历史作用力,从而将原本难以计算的模型简化为可以用常规数学工具求解的普通微分方程组。
The Maxey-Riley-Gatignol equations (MaRGE) model the motion of spherical inertial particles in a fluid. They contain the Basset force, an integral term which models history effects due to the formation of wakes and boundary layer effects. This causes the force that acts on a particle to depend on its past trajectory and complicates the numerical solution of MaRGE. Therefore, the Basset force is often neglected, despite substantial evidence that it has both quantitative and qualitative impact on the movement patterns of modelled particles. Using the concept of universal differential equations, we propose an approximation of the history term via neural networks which approximates MaRGE by a system of ordinary differential equations that can be solved with standard numerical solvers like Runge-Kutta methods.
通过通用微分方程逼近Maxey-Riley-Gatignol方程中的Basset力 / Approximation of the Basset force in the Maxey-Riley-Gatignol equations via universal differential equations
这篇论文提出了一种新方法,使用神经网络来近似模拟流体中粒子运动方程里一个复杂的历史作用力,从而将原本难以计算的模型简化为可以用常规数学工具求解的普通微分方程组。
源自 arXiv: 2604.08194