Self-similar ansatz
= Self-similar ansatz
A <self-similar ansatz> expresses evolving fields through a dimensionless similarity coordinate such as $x=r/R(t)$, reducing a partial differential equation to ordinary differential equations in $x$.
= Self-similar ansatz
A <self-similar ansatz> expresses evolving fields through a dimensionless similarity coordinate such as $x=r/R(t)$, reducing a partial differential equation to ordinary differential equations in $x$.