2.2 The Continuity Equation - PolymerProcessing.com: Information and Education on Polymer Pr

Transport Phenomena 11 Rectangular coordinates: ∂ρ ∂t + ∂ ∂x (ρv x)+ ∂ ∂ (ρv y)+ ∂ ∂z (ρv z)=0 Cylindrical coordinates: ∂ρ ∂t + 1 r ∂ ∂r (ρrv r)+ 1 r ∂ ∂θ (ρv θ)+ ∂ ∂z (ρv z)=0 Spherical coordinates: ∂ρ ∂t + 1 r2 ∂ ∂r (ρr2v r)+ 1 rsinθ ∂ ∂θ (ρv θ sinθ)+ 1

www.polymerprocessing.com