What is this $\frac{u\tau^d}{h}$ ?

@pavelkang: It's the CFL condition; for a linear PDE, it is the condition that ensures a first-order linear ODE will remain stable when using an explicit integrator.

What is this $\frac{u\tau^d}{h}$ ?

@pavelkang: It's the CFL condition; for a linear PDE, it is the condition that ensures a first-order linear ODE will remain stable when using an explicit integrator.