The results show that the simulation results fit the theoretic results(by separate variable method)very well when the heat capacity matrix is lumped with appropriate time step.
However, if the heat capacity matrix is not lumped, the numerical oscillation problem can not to be resolved even though by refining the local mesh or by decreasing the time step.
如果不进行集中热容矩阵,无论是细化网格还是减小时间步长,其解决数值振荡问题的效果都不好。
3
The methods of local mesh refined, dynamic time step and lumped heat capacity matrix were introduced to resolve the numerical oscillation problem.