Conserved variables W=掘t=oj(x)X Conservation of the collision operator 蝌WX=jU·/X=0 A property: for any linear combination of f and feq, i.e fe=(1-b)f+ bfeg The conservation variables can be calculated by w=oj()fax( )fd 轾犏 = = X 犏犏犏犏臌 W u ò E r r j x r Conserved variables 1 2 2 1 ( ) 轾犏 = 犏犏犏犏臌 j x x x [ ] 1 0 eq 蝌j j W X = - X = fd f f fd t Conservation of the collision operator A property: for any linear combination of f and f eq , i.e., = X ( )f d¢ W ò j x (1 ) eq f f f ¢= - + b b The conservation variables can be calculated by