∂u/∂t • Advection • Affect • Amount • Away • Behavior • Change • Changes • Coefficient • Color • Conserved • D∇u • Describes • Determines • Diffusion • Equation • Factors • Field • Flow • Gravitational • Heat • Infection • Interpretation • Main • Mean • Modeled • Momentum • Motion • Moving • Physical • Predator • Pressure • Quantity • Random • Rate • Role • Same • Spread • Spreading • System • Temperature • Term • Texture • Time • Towards • Transport • Two • V∇u • Velocity • Words