DiffusionPDETerm

DiffusionPDETerm[vars] represents a diffusion term ∇{x1,…,xn}·(-∇{x1,…,xn}u) with model variables vars.

DiffusionPDETerm[vars,c] represents a diffusion term ∇{x1,…,xn}·(-c∇{x1,…,xn}u) with diffusion coefficient c.

DiffusionPDETerm[vars,c,pars] uses model parameters pars.

Examples

Create a diffusion term for a 2D problem:

DiffusionPDETerm[{u[x, y], {x, y}}]

Please visit the official Wolfram Language Reference for more details.