Fig. 4
From: Unified gas-kinetic wave-particle methods IV: multi-species gas mixture and plasma transport
Left figure shows the result of nonlinear Landau damping, Red line shows the time evolution of the electric energy calculated by the UGKWP method, and the black lines show the reference solutions. Right figure shows the result of two stream instability. Red line shows the time evolution of the electric energy calculated by the UGKWP method, and the black line gives the theoretical prediction of the electric energy increase rate