上游充通大睾 2.1.2 Euler.方法 Shanghai Jiao Tong University 总导数(total derivative)或物质导数，随体导数(material,. substantial derivative ) D)_a)+(vv() Dt Ot a() ()w()wa() +1W Ox dy local rate of change convective rate of change e.g.,local acceleration 8t convective acccleration-(VV avav av +W 02Shanghai Jiao Tong University 2.1.2 Euler方法 ( ) ( ) ( )( ) ( ) { ( ) ( ) ( ) ( ) convective rate of chang e.g., local acceleration = convective acceleration = local rate of chang e e uvw xy z uvw t y t z t x D Dt = + ∂ ∂ ∂ ∂ • ∂∂ ∂ + + ∂∂ ∂ ∂ ∂ ∂ • ++ ∂ ∂ ∂ ∂ ∂ = + V V V V V V V 14444244443 = ∇ ∇ 总导数(total derivative) 或物质导数，随体导数 (material, substantial derivative )：