Solve time-dependent problems with explicit time stepping. Note that in the Model Builder, the Time-Dependent Solver node includes all time-explicit settings, and the Time-Explicit Solver is not available since version 6.1. You can use the API for Time instead.

 Operation feature. The TimeExplicit solver is used for solving time-dependent PDEs using the classic Runge–Kutta or the Adams–Bashforth 3 explicit time-stepping schemes

The order of the Runge–Kutta method can be set by the erkorder property. The size of the time step is controlled through the property rktimestep and can be given as a single scalar value, a (strictly monotone) numeric vector, or an expression using variables with global scope, which results in a scalar. For Adams–Bashforth 3, only a scalar constant value of the time step is allowed. Time stepping from expressions tstepping=elemexprs is useful for the Wave Form PDE interface. A local time-stepping version of Adams–Bashforth 3 is available for the Wave Form PDE interface by odesolver = ab3loc.

The TimeExplicit time-explicit solver has been removed from the Model Builder in version 6.1 but can still be used in the API. Instead, use the Time solver with an explicit time stepping. The TimeExplicit solver is still available in the Model Builder if you open models created in versions before 6.1 that include a TimeExplicit solver.