Misc

Misc

Simulator defaults

Starting a new simulation

Starting a new simulation will start a Grey-Scott simulation with two species, $u$ and $v$.

Changing the default variable names

When changing “# species” to a higher number previously set, new species will be named by default to SPECIES2, SPECIES3 and SPECIES4, for 2, 3, 4 species, respectively.

You are advised to change them to $v$, $w$, $q$ for simplicity, as other parameters are also defined according to them, e.g. $D_{SPECIES2} = D_v$ and so on.

Default timestepping

By default, VisualPDE uses the Forward Euler method with $\Delta t = 0.1$, this is likely to be too big for many problems. We recommend reducing the timestep and/or changing the method in this case.

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